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1.
Rolle, Clarence J.
Selective aerobic oxidations catalyzed by manganese(III) complexes using redox-active ligands.
Degree: PhD, Chemistry and Biochemistry, 2011, Georgia Tech
URL: http://hdl.handle.net/1853/42827 
► Selective oxidations are important for the functionalization of compounds in organic synthesis and chemical industry. Using O2 as a terminal e- acceptor would be ideal…
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▼ Selective oxidations are important for the functionalization of compounds in organic synthesis and chemical industry. Using O2 as a terminal e- acceptor would be ideal because it is cheap and environmentally friendly, but aerobic oxidations are often prone to unselective free radical autoxidation. Recently developed palladium catalysts use O2 as a selective multi-electron oxidant for various organic transformations. Although these methods are powerful and sophisticated, the lower cost of base metals makes them attractive as potential alternatives. The challenge is to develop methods for effecting multi-electron transformations at metals that typically prefer one electron changes. To this end, the development of manganese(III) complexes containing redox-active ligands as catalysts for selective oxidase-type oxidation of organic substrates was pursued. Bis(tetrabromocatecholato) manganese(III) complexes were shown to aerobically oxidize catechols to form quinones and H2O2. This reactivity was extended to other alcohol and amine substrates. In these reactions, the non-innocent tetrabromocatecholate ligands may impart a multi-electron character to the metal. To directly probe the intermediacy of ligand-centered radicals in catalytic turnover, a series of structurally similar manganese(III) complexes with aminophenol-derived ligands were prepared and characterized. The capacity of these ligands to undergo low-energy redox changes, allowed for isolation of an electron transfer series spanning two redox states without a change in oxidation state at the metal center. The ligand-centered redox events were a key feature in aerobic homocoupling of Grignard reagents.
Advisors/Committee Members: Jake Soper (Committee Chair), Angus Wilkinson (Committee Member), Christoph Fahrni (Committee Member), Christopher Jones (Committee Member), Kent Barefield (Committee Member).
Subjects/Keywords: Oxidation chemistry; Metal catalysts; Metalloenzymes; Manganese; Manganese catalysts; Oxidases; Oxidation
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APA (6th Edition):
Rolle, C. J. (2011). Selective aerobic oxidations catalyzed by manganese(III) complexes using redox-active ligands. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/42827
Chicago Manual of Style (16th Edition):
Rolle, Clarence J. “Selective aerobic oxidations catalyzed by manganese(III) complexes using redox-active ligands.” 2011. Doctoral Dissertation, Georgia Tech. Accessed January 20, 2021.
http://hdl.handle.net/1853/42827.
MLA Handbook (7th Edition):
Rolle, Clarence J. “Selective aerobic oxidations catalyzed by manganese(III) complexes using redox-active ligands.” 2011. Web. 20 Jan 2021.
Vancouver:
Rolle CJ. Selective aerobic oxidations catalyzed by manganese(III) complexes using redox-active ligands. [Internet] [Doctoral dissertation]. Georgia Tech; 2011. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1853/42827.
Council of Science Editors:
Rolle CJ. Selective aerobic oxidations catalyzed by manganese(III) complexes using redox-active ligands. [Doctoral Dissertation]. Georgia Tech; 2011. Available from: http://hdl.handle.net/1853/42827
2.
Flack, Kyle M.
Two approaches to green chemistry in industrially driven processes: aluminum tert-butoxide as a rate enhancing Meerwein-Ponndorf-Verley reduction catalyst applied to the technological transfer from batch to continuous flow and structural modifications of functionalized trialkylsilylamines as energy efficient carbon dioxide capture solvents.
Degree: PhD, Chemistry and Biochemistry, 2012, Georgia Tech
URL: http://hdl.handle.net/1853/44802
► Green chemistry principles have been applied to the enhancement of two industrial chemistry problems. An industrially used reaction to form alcohols from aldehydes and ketones,…
(more)
▼ Green chemistry principles have been applied to the enhancement of two industrial chemistry problems. An industrially used reaction to form alcohols from aldehydes and ketones, the Meerwein-Ponndorf-Verley reduction, was improved by introducing a new catalyst Al(OtBu)₃. Due to the lower state of aggregation of this catalyst versus the conventional Al(OiPr)₃ catalyst, reduction rates were found to be faster in both pure iPrOH and mixed solvent systems for three model compounds: benzaldehyde, acetophenone, and a complex, chiral ketone, (S)-CMK. This allowed for the successful implementation of two important milestones; lowering the amount of catalyst needed necessary to complete the reactions (an economic benefit and lower waste) and the conversion from traditional batch reactions to continuous flow (a processing benefit) whereby reactions can be scaled-out rather than scaled-up. Another industrially important field of research that was focused on was CO₂ capture. High energy demands from current CO₂ capture methods such as aqueous amine solvents, specifically from coal-fired power plant flue gas, led to the development of non-aqueous reversible ionic liquids based on silylated amines. Structural modifications of the substitution around the silicon atom, the length of the alkyl chain bonding the silicon and amine, branching along the alkyl backbone, and investigating secondary and primary amines within this class of silylated amines were completed. These amines were reacted with CO₂ and the CO₂ capacity, the ionic liquid viscosity, reversal temperature and reaction enthalpy were all considered as a function of structure. In all cases the capacity was found to be not only greater than that of monethanolamine, an industrial standard, but higher than theoretical predictions through the formation of carbamic acid. Viscosity, reversal temperature, and reaction enthalpy were all found to be tunable through structure. These modifications gave significant insight into the necessary direction for optimization of these solvents as energy-efficient replacements of current CO₂ capture technology.
Advisors/Committee Members: Dr. Charles L. Liotta (Committee Chair), Dr. Charles A. Eckert (Committee Co-Chair), Dr. Angelo Bongiorno (Committee Member), Dr. Christopher Jones (Committee Member), Dr. Stefan France (Committee Member).
Subjects/Keywords: Silylated amines; Continuous flow; MPV reduction; Reversible ionic liquids; Carbon capture; Environmental chemistry Industrial applications; Carbon sequestration; Chemistry, Organic
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APA (6th Edition):
Flack, K. M. (2012). Two approaches to green chemistry in industrially driven processes: aluminum tert-butoxide as a rate enhancing Meerwein-Ponndorf-Verley reduction catalyst applied to the technological transfer from batch to continuous flow and structural modifications of functionalized trialkylsilylamines as energy efficient carbon dioxide capture solvents. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/44802
Chicago Manual of Style (16th Edition):
Flack, Kyle M. “Two approaches to green chemistry in industrially driven processes: aluminum tert-butoxide as a rate enhancing Meerwein-Ponndorf-Verley reduction catalyst applied to the technological transfer from batch to continuous flow and structural modifications of functionalized trialkylsilylamines as energy efficient carbon dioxide capture solvents.” 2012. Doctoral Dissertation, Georgia Tech. Accessed January 20, 2021.
http://hdl.handle.net/1853/44802.
MLA Handbook (7th Edition):
Flack, Kyle M. “Two approaches to green chemistry in industrially driven processes: aluminum tert-butoxide as a rate enhancing Meerwein-Ponndorf-Verley reduction catalyst applied to the technological transfer from batch to continuous flow and structural modifications of functionalized trialkylsilylamines as energy efficient carbon dioxide capture solvents.” 2012. Web. 20 Jan 2021.
Vancouver:
Flack KM. Two approaches to green chemistry in industrially driven processes: aluminum tert-butoxide as a rate enhancing Meerwein-Ponndorf-Verley reduction catalyst applied to the technological transfer from batch to continuous flow and structural modifications of functionalized trialkylsilylamines as energy efficient carbon dioxide capture solvents. [Internet] [Doctoral dissertation]. Georgia Tech; 2012. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1853/44802.
Council of Science Editors:
Flack KM. Two approaches to green chemistry in industrially driven processes: aluminum tert-butoxide as a rate enhancing Meerwein-Ponndorf-Verley reduction catalyst applied to the technological transfer from batch to continuous flow and structural modifications of functionalized trialkylsilylamines as energy efficient carbon dioxide capture solvents. [Doctoral Dissertation]. Georgia Tech; 2012. Available from: http://hdl.handle.net/1853/44802
3.
Yen, Chun-Wan.
Plasmonic photochemistry on the nanoscale.
Degree: PhD, Chemistry and Biochemistry, 2011, Georgia Tech
URL: http://hdl.handle.net/1853/41085
► When nanoparticles are small in size compared to the wavelength of incident light, a localized surface plasmon resonance occurs. For certain noble metals, such as…
(more)
▼ When nanoparticles are small in size compared to the wavelength of incident light, a localized surface plasmon resonance occurs. For certain noble metals, such as gold and silver, this frequency occurs in the visible or near IR range, and therefore it can be utilized for many important applications. Only silver and gold nanoparticles were utilized in this thesis work, and they were used in application for three separate files: environment, catalysis, and energy.
Advisors/Committee Members: Mostafa A. El-Sayed (Committee Chair), Christopher Jones (Committee Member), John Zhang (Committee Member), Lawrence A. Bottomley (Committee Member), Wendy Kelly (Committee Member).
Subjects/Keywords: Photochemistry; Plasmon; Nanomaterial; Photochemistry Research; Nanostructured materials; Nanoparticles; Photocatalysis
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APA (6th Edition):
Yen, C. (2011). Plasmonic photochemistry on the nanoscale. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/41085
Chicago Manual of Style (16th Edition):
Yen, Chun-Wan. “Plasmonic photochemistry on the nanoscale.” 2011. Doctoral Dissertation, Georgia Tech. Accessed January 20, 2021.
http://hdl.handle.net/1853/41085.
MLA Handbook (7th Edition):
Yen, Chun-Wan. “Plasmonic photochemistry on the nanoscale.” 2011. Web. 20 Jan 2021.
Vancouver:
Yen C. Plasmonic photochemistry on the nanoscale. [Internet] [Doctoral dissertation]. Georgia Tech; 2011. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1853/41085.
Council of Science Editors:
Yen C. Plasmonic photochemistry on the nanoscale. [Doctoral Dissertation]. Georgia Tech; 2011. Available from: http://hdl.handle.net/1853/41085
4.
Hoskins, Travis Justin Christopher.
Carbon-carbon bond forming reactions
of biomass derived aldehydes.
Degree: MS, Chemical Engineering, 2008, Georgia Tech
URL: http://hdl.handle.net/1853/29769
► The Knoevenagel reaction was applied to form a carbon-carbon double bond between the aldehydes (HMF, furfual) and an alpha di-carbonyl compound. The alpha di-carbonyl compound…
(more)
▼ The Knoevenagel reaction was applied to form a carbon-carbon double bond between the aldehydes (HMF, furfual) and an alpha di-carbonyl compound. The alpha di-carbonyl compound used was malonic acid, which can be bio-derived from glucose along fermentation routes. The effects of solvents (THF, water, ethanol, isopropanol, ethyl ether, toluene) and catalysts (e.g. homogeneous and heterogeneous amines, solid basic oxides) on the yields of alpha-beta unsaturated acids were investigated. It was found that the homogeneous amines worked well in THF solvent (90-100% conversion, 99% selectivity for furfural and HMF), while the poly(styrene) supported ethylenediamine gave a higher conversion and selectivity for HMF (65± 5%, 99% selectivity) over furfural (58 ± 7%, 99% selectivity). This trend was also present in competition reactions where both HMF and furfural were reacted in the same vessel. á-â Unsaturated mono-acids for both HMF and furfural were identified as minor side products. However, levulinic acid did not work as well under the conditions studied. Lastly, among the solvents studied, several caused precipitation of the Knoevenagel products.
Advisors/Committee Members: Dr. Christopher Jones (Committee Chair), Dr. Pradeep Agrawal (Committee Co-Chair), Dr. Sujit Banerjee (Committee Member), Dr. Tom Fuller (Committee Member).
Subjects/Keywords: HMF; Furfural; Knoevenagel; Biomass; Aldehydes; Biomass energy; Chemical bonds
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APA (6th Edition):
Hoskins, T. J. C. (2008). Carbon-carbon bond forming reactions
of biomass derived aldehydes. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/29769
Chicago Manual of Style (16th Edition):
Hoskins, Travis Justin Christopher. “Carbon-carbon bond forming reactions
of biomass derived aldehydes.” 2008. Masters Thesis, Georgia Tech. Accessed January 20, 2021.
http://hdl.handle.net/1853/29769.
MLA Handbook (7th Edition):
Hoskins, Travis Justin Christopher. “Carbon-carbon bond forming reactions
of biomass derived aldehydes.” 2008. Web. 20 Jan 2021.
Vancouver:
Hoskins TJC. Carbon-carbon bond forming reactions
of biomass derived aldehydes. [Internet] [Masters thesis]. Georgia Tech; 2008. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1853/29769.
Council of Science Editors:
Hoskins TJC. Carbon-carbon bond forming reactions
of biomass derived aldehydes. [Masters Thesis]. Georgia Tech; 2008. Available from: http://hdl.handle.net/1853/29769
Georgia Tech
5.
Heintz, Eva Liang-Huang.
Surface Biological Modification and Cellular Interactions of Magnetic Spinel Ferrite Nanoparticles.
Degree: PhD, Chemistry and Biochemistry, 2004, Georgia Tech
URL: http://hdl.handle.net/1853/4944
► Surface Biological Modification and Cellular Interactions of Magnetic Spinel Nanoparticles Eva Liang-Huang Heintz 191 Pages Directed by Dr. Z. John Zhang The interest in magnetic…
(more)
▼ Surface Biological Modification and Cellular Interactions of Magnetic Spinel Nanoparticles
Eva Liang-Huang Heintz
191 Pages
Directed by Dr. Z. John Zhang
The interest in magnetic nanoparticles is multi-dimensional. Fundamentally, it is important to be able to control their magnetic properties and to correlate to specific applications. In biology, magnetic nanoparticles offer promising potential as magnetic carriers or chaperones for magnetic localization and manipulation of therapeutic reagents.
The synthesis of superparamagnetic CoFe2-xSmxO4 nanoparticles and the tunability of their magnetic properties by size and composition variations are discussed. An increase in size of CoSm0.19Fe1.81O4 nanoparticles produced an increase in blocking temperature and saturation magnetization, but a non-linear coercitivity response was observed with change in size. By varying the composition, the saturation magnetization of CoFe2-xSmxO4 decreased dramatically while the coercitivity increased when compared to native cobalt spinel ferrite (CoFe2O4) nanoparticles. These results demonstrate how the magnetic properties of cobalt spinel ferrite nanoparticles can be tailored to specific applications.
Surface modifications of cobalt spinel ferrite nanoparticles facilitated the conjugation of oligonucleotides. Using a transfection reagent, CoFe2O4 ??igonucleotide conjugates were delivered into mammalian cells. Post transfection, synchronized movement of cells in response to an external magnetic field was observed. This demonstrated the possibility of magnetic manipulation and localization of therapeutic reagents coupled to CoFe2O4 magnetic nanoparticles.
Results from this thesis demonstrate the potential role of magnetic spinel nanoparticles in cell biology and will facilitate the progress towards in vivo testing.
Advisors/Committee Members: Dr. Z. John Zhang (Committee Chair), Dr. Christopher Jones (Committee Member), Dr. Jiri Janata (Committee Member), Dr. L. Andrew Lyon (Committee Member), Dr. Laren Tolbert (Committee Member).
Subjects/Keywords: Magnetic nanoparticles; Spinel ferrite; Transfection; Magnetic manipulation; Samarium; Surface modification
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APA (6th Edition):
Heintz, E. L. (2004). Surface Biological Modification and Cellular Interactions of Magnetic Spinel Ferrite Nanoparticles. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/4944
Chicago Manual of Style (16th Edition):
Heintz, Eva Liang-Huang. “Surface Biological Modification and Cellular Interactions of Magnetic Spinel Ferrite Nanoparticles.” 2004. Doctoral Dissertation, Georgia Tech. Accessed January 20, 2021.
http://hdl.handle.net/1853/4944.
MLA Handbook (7th Edition):
Heintz, Eva Liang-Huang. “Surface Biological Modification and Cellular Interactions of Magnetic Spinel Ferrite Nanoparticles.” 2004. Web. 20 Jan 2021.
Vancouver:
Heintz EL. Surface Biological Modification and Cellular Interactions of Magnetic Spinel Ferrite Nanoparticles. [Internet] [Doctoral dissertation]. Georgia Tech; 2004. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1853/4944.
Council of Science Editors:
Heintz EL. Surface Biological Modification and Cellular Interactions of Magnetic Spinel Ferrite Nanoparticles. [Doctoral Dissertation]. Georgia Tech; 2004. Available from: http://hdl.handle.net/1853/4944
Georgia Tech
6.
Chafin, Raymond William, II.
Torlon® and Silicalite Mixed Matrix Membranes for Xylene Isomer Purification.
Degree: PhD, Chemical Engineering, 2007, Georgia Tech
URL: http://hdl.handle.net/1853/14562
► Organic/inorganic materials have a high potential to enable major advances in membrane performance. It has previously been impossible to develop polymeric systems with adequate transport…
(more)
▼ Organic/inorganic materials have a high potential to enable major advances in membrane performance. It has previously been impossible to develop polymeric systems with adequate transport properties for xylene purification. Zeolite membranes have been created with the appropriate selectivities; however low productivity, low mechanical durability, and high capital costs have kept these materials from being utilized. So-called mixed matrix hybrid organic/inorganic membranes combine the mechanical durability and cost effectiveness of polymeric membranes with the enhanced performance of zeolitic structures. This project will focus on investigating polymeric and molecular sieve materials for mixed matrix membrane use in xylene isomer separation as a model system. Torlon polyamide-imide has unique properties that should be potentially useful in a mixed matrix composite. Silicalite will be investigated as the dispersed phased given its proven applicability with xylene isomers.
The overarching goal is to establish an approach for creation of mixed matrix materials that can be broadly applied to challenging organic separations. This project has three specific goals: (1) characterization of Torlons inherent properties, processing ability, and important transport potential, (2) characterization of zeolite matching properties and the effect of interfacial engineering on these properties, and (3) development of appropriate approaches to combine the sieve and polymer to obtain a hybrid material with properties that match theoretically predicted separation property enhancements relative to the neat polymer. High temperature pervaporation will be used to evaluate material transport properties, as this experimental setup closely mimics the high activity vapor streams found in many industrial xylene processes. The results of this research will be used to develop a protocol for development of future mixed matrix membranes that may be applied to a variety of organic liquid systems.
Advisors/Committee Members: Dr. William Koros (Committee Chair), Dr. Andrew Lyon (Committee Member), Dr. Carson Mereditch (Committee Member), Dr. Christopher Jones (Committee Member), Dr. Jeff Miller (Committee Member).
Subjects/Keywords: Xylene; Torlon; Pervaporation; Membranes; Organic liquid separation; Polyamideimide
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APA (6th Edition):
Chafin, Raymond William, I. (2007). Torlon® and Silicalite Mixed Matrix Membranes for Xylene Isomer Purification. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/14562
Chicago Manual of Style (16th Edition):
Chafin, Raymond William, II. “Torlon® and Silicalite Mixed Matrix Membranes for Xylene Isomer Purification.” 2007. Doctoral Dissertation, Georgia Tech. Accessed January 20, 2021.
http://hdl.handle.net/1853/14562.
MLA Handbook (7th Edition):
Chafin, Raymond William, II. “Torlon® and Silicalite Mixed Matrix Membranes for Xylene Isomer Purification.” 2007. Web. 20 Jan 2021.
Vancouver:
Chafin, Raymond William I. Torlon® and Silicalite Mixed Matrix Membranes for Xylene Isomer Purification. [Internet] [Doctoral dissertation]. Georgia Tech; 2007. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1853/14562.
Council of Science Editors:
Chafin, Raymond William I. Torlon® and Silicalite Mixed Matrix Membranes for Xylene Isomer Purification. [Doctoral Dissertation]. Georgia Tech; 2007. Available from: http://hdl.handle.net/1853/14562
Georgia Tech
7.
Shiels, Rebecca Anne.
Synthesis, characterization, and evaluation of silica and polymer supported catalysts for the production of fine chemicals.
Degree: PhD, Chemical Engineering, 2008, Georgia Tech
URL: http://hdl.handle.net/1853/29629
► Catalysis is an important field of study in chemical engineering and chemistry due to its application in a vast number of chemical transformations. Traditionally, catalysts…
(more)
▼ Catalysis is an important field of study in chemical engineering and chemistry due to its application in a vast number of chemical transformations. Traditionally, catalysts have been developed as homogeneous molecular species or as heterogeneous insoluble materials. While homogeneous catalysts are typically very active and selective, they are difficult to recover. Conversely, heterogeneous catalysts are easy to recover and reuse, but they generally are less selective. To address these issues, the immobilization of homogeneous catalyst analogs onto solid supports has been a subject of research for the past few decades. Nonetheless, the effects of immobilization are still not completely predictable, and so continued effort is required to develop new immobilized catalysts as well as to develop a better understanding of how different parameters affect catalytic behavior.
This dissertation presents the synthesis, characterization, and evaluation of new immobilized catalysts for different applications. First, a solid base catalyst supported on silica was developed and studied in the synthesis of cyclic carbonates from epoxides and carbon dioxide. Next, polymer and silica supported vanadium Schiff base catalysts were developed and evaluated for use in the oxidative kinetic resolution of alpha-hydroxy esters, an enantioselective reaction. Lastly, salen catalyst analogs with amine reactive functional groups were synthesized and characterized for grafting onto aminosilicas with different degrees of amine group isolation. The grafted catalysts were then tested to determine how catalyst spacing on the surface affects their behavior. Throughout the presentation of these results, comparisons are made amongst the new supported catalysts and relevant existing catalysts to discern general trends which could be applied to a wider range of immobilized catalysts. Finally, research opportunities for further improvements in these areas are suggested.
Advisors/Committee Members: Dr. Christopher Jones (Committee Chair), Dr. Dennis Hess (Committee Member), Dr. Hang Lu (Committee Member), Dr. Marcus Weck (Committee Member), Dr. Pradeep Agrawal (Committee Member).
Subjects/Keywords: Immobilized catalyst; Hydrolytic kinetic resolution; Vanadium; Oxidative kinetic resolution; Cyclic carbonate; SBA-15; Salen; Silica; Catalysts; Catalysis; Schiff bases
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APA (6th Edition):
Shiels, R. A. (2008). Synthesis, characterization, and evaluation of silica and polymer supported catalysts for the production of fine chemicals. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/29629
Chicago Manual of Style (16th Edition):
Shiels, Rebecca Anne. “Synthesis, characterization, and evaluation of silica and polymer supported catalysts for the production of fine chemicals.” 2008. Doctoral Dissertation, Georgia Tech. Accessed January 20, 2021.
http://hdl.handle.net/1853/29629.
MLA Handbook (7th Edition):
Shiels, Rebecca Anne. “Synthesis, characterization, and evaluation of silica and polymer supported catalysts for the production of fine chemicals.” 2008. Web. 20 Jan 2021.
Vancouver:
Shiels RA. Synthesis, characterization, and evaluation of silica and polymer supported catalysts for the production of fine chemicals. [Internet] [Doctoral dissertation]. Georgia Tech; 2008. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1853/29629.
Council of Science Editors:
Shiels RA. Synthesis, characterization, and evaluation of silica and polymer supported catalysts for the production of fine chemicals. [Doctoral Dissertation]. Georgia Tech; 2008. Available from: http://hdl.handle.net/1853/29629
Georgia Tech
8.
Kimyonok, Alpay.
Side-chain functionalized luminescent polymers for organic light-emitting diode applications.
Degree: PhD, Chemistry and Biochemistry, 2008, Georgia Tech
URL: http://hdl.handle.net/1853/29649
► This thesis aims to provide a detailed understanding of side-chain functionalized polymers as emissive materials for OLEDs. The syntheses and photophysical properties of these solution-processable…
(more)
▼ This thesis aims to provide a detailed understanding of side-chain functionalized polymers as emissive materials for OLEDs. The syntheses and photophysical properties of these solution-processable materials as well as the effects of metal types, polymer backbones, chain lengths, spacer types and lengths, host types, and concentrations of the metal complexes on the emission properties and device performance will be dicussed.
The polymers were functionalized with host materials along with the metal complexes to enhance the charge transport and to obtain energy transfer from the host to the complex. The physical and photophysical properties of the polymers were tuned by changing the backbone and the metal complex. Poly(norbornene)s, poly(cyclooctene)s, and poly(styrene)s were studied. The differences in the glass transition temperatures and PDIs of the polymers indicated that device performances might be affected by the polymer type due to the differences in the processability of the polymers. In addition to the backbone, it was found that device performance is dependent on various parameters such as molecular weight, metal loading, spacer type, and spacer length. In each case, it was found that the polymer backbone does not interfere with the basic photopysical properties of the metal complexes.
The two main classes of metal complexes studied in this thesis are metalloquinolates and iridium complexes. It was shown that the emission properties of poly(cyclooctene)s containing 8-hydroxyquinolines in their side-chains could be altered by simply changing the metal. Green- and near IR-emitting polymers were synthesized by employing aluminum and ytterbium, respectively. On the other hand, for the iridium complexes, changes in color were achieved by varying the ligands. Iridium containing polymers with emission spectra that span the entire visible spectrum were synthesized by employing the appropriate ligands. It was demonstrated that OLEDs with high efficiencies can be fabricated by using these polymers as the emissive layer.
Advisors/Committee Members: Weck, Marcus (Committee Chair), Christopher Jones (Committee Member), Jean-Luc Bredas (Committee Member), Joseph Perry (Committee Member), Laren M. Tolbert (Committee Member).
Subjects/Keywords: OLED; Iridium; Fluorescence; Phosphorescence; Polymer; Quinolates; Light emitting diodes; Polymerization
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APA (6th Edition):
Kimyonok, A. (2008). Side-chain functionalized luminescent polymers for organic light-emitting diode applications. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/29649
Chicago Manual of Style (16th Edition):
Kimyonok, Alpay. “Side-chain functionalized luminescent polymers for organic light-emitting diode applications.” 2008. Doctoral Dissertation, Georgia Tech. Accessed January 20, 2021.
http://hdl.handle.net/1853/29649.
MLA Handbook (7th Edition):
Kimyonok, Alpay. “Side-chain functionalized luminescent polymers for organic light-emitting diode applications.” 2008. Web. 20 Jan 2021.
Vancouver:
Kimyonok A. Side-chain functionalized luminescent polymers for organic light-emitting diode applications. [Internet] [Doctoral dissertation]. Georgia Tech; 2008. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1853/29649.
Council of Science Editors:
Kimyonok A. Side-chain functionalized luminescent polymers for organic light-emitting diode applications. [Doctoral Dissertation]. Georgia Tech; 2008. Available from: http://hdl.handle.net/1853/29649
Georgia Tech
9.
Blasucci, Vittoria Madonna.
Organic solvents for catalysis and organic reactions.
Degree: PhD, Chemical Engineering, 2009, Georgia Tech
URL: http://hdl.handle.net/1853/31723
► We develop, characterize, and apply novel solvent systems for enhanced separations. The field of separations has long been explored by chemical engineers. One way to…
(more)
▼ We develop, characterize, and apply novel solvent systems for enhanced separations. The field of separations has long been explored by chemical engineers. One way to optimize separations is through solvent manipulation. Through molecular design, smart solvents can be created which accomplish this task. Smart solvents undergo step or gradual changes in properties when activated by a stimulus. These property changes enable unique chemistry and separations. This thesis explores the application of two different types of smart solvents: switchable and tunable solvents. First we show that a neutral liquid can react with carbon dioxide and be switched into an ionic liquid which can then be thermally reversed back to its molecular form. Each form that the solvent takes has unique properties that can be structurally tuned to span a large range. We also look at a tunable solvent system based on polyethylene glycol/dioxane that is initially homogeneous, but induced to a heterogeneous system through carbon dioxide pressurization. Finally, we look at the advantage of using carbon dioxide as a co-solvent that is easily removed post-reaction for the grafting of silanes onto polyolefin backbones.
Advisors/Committee Members: Charles Eckert (Committee Chair), Charles Liotta (Committee Co-Chair), Amyn Teja (Committee Member), Christopher Jones (Committee Member), William Koros (Committee Member).
Subjects/Keywords: Smart solvents; Reversible ionic liquids; Alternative solvents; Tunable solvents; Polymer grafting; Amines; Solvents; Organic compounds
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APA (6th Edition):
Blasucci, V. M. (2009). Organic solvents for catalysis and organic reactions. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/31723
Chicago Manual of Style (16th Edition):
Blasucci, Vittoria Madonna. “Organic solvents for catalysis and organic reactions.” 2009. Doctoral Dissertation, Georgia Tech. Accessed January 20, 2021.
http://hdl.handle.net/1853/31723.
MLA Handbook (7th Edition):
Blasucci, Vittoria Madonna. “Organic solvents for catalysis and organic reactions.” 2009. Web. 20 Jan 2021.
Vancouver:
Blasucci VM. Organic solvents for catalysis and organic reactions. [Internet] [Doctoral dissertation]. Georgia Tech; 2009. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1853/31723.
Council of Science Editors:
Blasucci VM. Organic solvents for catalysis and organic reactions. [Doctoral Dissertation]. Georgia Tech; 2009. Available from: http://hdl.handle.net/1853/31723
Georgia Tech
10.
Meyers, Amy.
The Design and Synthesis of Metal-Functionalized Poly(norbornenes) for Potential Use in Light-Emitting Diodes.
Degree: PhD, Chemistry and Biochemistry, 2004, Georgia Tech
URL: http://hdl.handle.net/1853/6985
► The use of polymers in electro-optical devices, especially light-emitting diodes (OLEDs), has become very popular in recent years, due to their ease of processability. The…
(more)
▼ The use of polymers in electro-optical devices, especially light-emitting diodes (OLEDs), has become very popular in recent years, due to their ease of processability. The major drawback of using polymers in these systems is their time-consuming synthesis when trying to improve upon their physical properties. For example, each time a new color or better conducting properties are desired, a new monomer must be synthesized. To circumvent these problems, the system described in this work is designed to connect the well-known chromophore aluminum tris(8-hydroxyquinoline) (Alq3) to a norbornene monomer unit, followed by polymerization using ring-opening metathesis polymerization (ROMP), thus allowing for the processability of a polymer while maintaining the fluorescent properties of the metalloquinolate.
The benefit of this system is that the monomers can be easily altered in order to tune color emission or to enhance the polymer properties. Some of the alterations include changing the metal center from aluminum to zinc in order to improve electron injection, adding substituents to the 8-hydroxyquinoline ligand in order to tune the emission color, and copolymerizing the Alq3-monomer with other norbornene monomers containing either a hole- or an electron-transport material side-chain to improve conductivity. These alterations lead to improved device performance and, more importantly, to a new method of designing polymeric systems for use in electronic devices.
Advisors/Committee Members: Marcus Weck (Committee Chair), Charles Liotta (Committee Member), Christopher Jones (Committee Member), David Collard (Committee Member), E. Kent Barefield (Committee Member).
Subjects/Keywords: Metaloquinolates; Fluorescent polymers; Poly(norbornenes); Light emitting diodes; Organic thin films; Fluorescent polymers
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Manager
APA (6th Edition):
Meyers, A. (2004). The Design and Synthesis of Metal-Functionalized Poly(norbornenes) for Potential Use in Light-Emitting Diodes. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/6985
Chicago Manual of Style (16th Edition):
Meyers, Amy. “The Design and Synthesis of Metal-Functionalized Poly(norbornenes) for Potential Use in Light-Emitting Diodes.” 2004. Doctoral Dissertation, Georgia Tech. Accessed January 20, 2021.
http://hdl.handle.net/1853/6985.
MLA Handbook (7th Edition):
Meyers, Amy. “The Design and Synthesis of Metal-Functionalized Poly(norbornenes) for Potential Use in Light-Emitting Diodes.” 2004. Web. 20 Jan 2021.
Vancouver:
Meyers A. The Design and Synthesis of Metal-Functionalized Poly(norbornenes) for Potential Use in Light-Emitting Diodes. [Internet] [Doctoral dissertation]. Georgia Tech; 2004. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1853/6985.
Council of Science Editors:
Meyers A. The Design and Synthesis of Metal-Functionalized Poly(norbornenes) for Potential Use in Light-Emitting Diodes. [Doctoral Dissertation]. Georgia Tech; 2004. Available from: http://hdl.handle.net/1853/6985
Georgia Tech
11.
Bhandari, Dhaval Ajit.
Hollow fiber sorbents for the desulfurization of pipeline natural gas.
Degree: PhD, Chemical Engineering, 2010, Georgia Tech
URL: http://hdl.handle.net/1853/42838
► Pipeline natural gas is the primary fuel of choice for distributed fuel cell-based applications. The concentration of sulfur in odorized natural gas is about 30…
(more)
▼ Pipeline natural gas is the primary fuel of choice for distributed fuel cell-based applications. The concentration of sulfur in odorized natural gas is about 30 ppm, with acceptable levels being <1 ppm for catalyst stability in such applications. Packed bed technology for desulfurization suffers from several disadvantages including high pressure drop and slow regeneration rates that require large unit sizes.
We describe a novel Rapid Temperature Swing Adsorption (RTSA) system utilizing hollow fibers with polymer 'binder', impregnated with high loadings of sulfur selective sorbent 'fillers'. Steam and cooling water can be utilized to thermally swing the sorbent during the regeneration cycles. An impermeable, thin polymer barrier layer on the outside of fiber sorbents allows only thermal interactions with the regeneration media, thereby promoting consistent sorption capacity over repeated cycles. A simplified flow pattern minimizes pressure drop, porous core morphology maximizes sorption efficiencies, while small fiber dimensions allows for rapid thermal cycles.
Advisors/Committee Members: Dr. William J. Koros (Committee Chair), Dr. Christopher Jones (Committee Member), Dr. James Stevens (Committee Member), Dr. Pradeep Agrawal (Committee Member), Dr. Ronald Rousseau (Committee Member), Dr. Satish Kumar (Committee Member).
Subjects/Keywords: Membranes; Natural gas; Separations; Porous media; Zeolites; Desulfurization; Adsorbents; Sorbents; Adsorption; Separation (Technology); Porous materials
Record Details
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Record Details
Similar Records
Cite
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bhandari, D. A. (2010). Hollow fiber sorbents for the desulfurization of pipeline natural gas. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/42838
Chicago Manual of Style (16th Edition):
Bhandari, Dhaval Ajit. “Hollow fiber sorbents for the desulfurization of pipeline natural gas.” 2010. Doctoral Dissertation, Georgia Tech. Accessed January 20, 2021.
http://hdl.handle.net/1853/42838.
MLA Handbook (7th Edition):
Bhandari, Dhaval Ajit. “Hollow fiber sorbents for the desulfurization of pipeline natural gas.” 2010. Web. 20 Jan 2021.
Vancouver:
Bhandari DA. Hollow fiber sorbents for the desulfurization of pipeline natural gas. [Internet] [Doctoral dissertation]. Georgia Tech; 2010. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1853/42838.
Council of Science Editors:
Bhandari DA. Hollow fiber sorbents for the desulfurization of pipeline natural gas. [Doctoral Dissertation]. Georgia Tech; 2010. Available from: http://hdl.handle.net/1853/42838
. 
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