Browsing Chemistry - Ph.D. / Sc.D. by Title
Now showing items 382-401 of 1156
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Galactofuranose in mycobacteria and nematodes
(Massachusetts Institute of Technology, 2020)All cells are covered in a coat of carbohydrates. These sugars participate in many important processes and are often essential for viability. Polysaccharides assembled by both prokaryotic and eukaryotic pathogens contain ... -
The gaseous compressibility of isobutane, the vapor pressures, critical constants, and gaseous compressibility of butene-1
(Massachusetts Institute of Technology, 1943) -
Gene expression-based screening of inhibitors of signal transduction
(Massachusetts Institute of Technology, 2006)Advances in our understanding of cellular function and signal transduction have resulted in ever increasing number of therapeutical targets and, consequently, underscored a demand for simple and universally applicable ... -
Generalized quantum defect methods in quantum chemistry
(Massachusetts Institute of Technology, 2006)The reaction matrix of multichannel quantum defect theory, K, gives a complete picture of the electronic structure and the electron - nuclear dynamics for a molecule. The reaction matrix can be used to examine both bound ... -
Generation and observation of reactive intermediates in the gas phase and condensed media
(Massachusetts Institute of Technology, 2017)A molecular beam mass spectrometer (MBMS) has been constructed and upgraded with a laser desorption system. MBMS has allowed for the detection of reactive small molecules including but not limited to P₂ from P₂A₂ (where A ... -
The generation of high field terahertz radiation and its application in terahertz nonlinear spectroscopy
(Massachusetts Institute of Technology, 2009)In this thesis research, I implemented a terahertz generation scheme that enables high-field near-single-cycle terahertz (THz) pulse generation via optical rectification in a LiNbO3 (LN) crystal. I also developed a method ... -
Generation of ultrahigh frequency acoustic waves for the characterization of complex materials
(Massachusetts Institute of Technology, 2005)A discussion of the anomalous low-temperature thermal properties of amorphous materials is first given as a theoretical framework in which the rest of the thesis is treated. The theory models the form and function of ... -
Genomic consequences of DNA oxidation by peroxynitrite
(Massachusetts Institute of Technology, 2006)The radicals nitric oxide and superoxide are produced endogenously by activated macrophages and neutrophils and combine in a diffusion-limited reaction to form peroxynitrite, a powerful oxidizing and nitrating agent capable ... -
Gold-nickel surface alloy chemistry with oxygen and carbon monoxide
(Massachusetts Institute of Technology, 2015)Key to low temperature carbon monoxide oxidation on gold-nickel random surface alloys is molecularly (rather than atomically) adsorbed oxygen, and weakly bound carbon monoxide. To characterize these adsorbates, saturation ... -
Grafted poly(phenylene-ethynylene) : optical and optoelectronic applications
(Massachusetts Institute of Technology, 2005)Poly(phenylene-ethynylene) (PPE), a fully conjugated polymer system, exhibits high solution state quantum yields, narrow emission profiles, and wide band gaps allowing for blue emission, making them ideal candidates for ... -
Graphite-conjugated catalysts : bridging heterogeneous and homogeneous catalysts
(Massachusetts Institute of Technology, 2019)This interconversion occurs via complex multistep, multielectron reactions, which can be carried out by either metallic heterogeneous or molecular homogeneous electrocatalysts. Metallic heterogeneous catalysts have a ... -
Group 4 complexes containing tridentate diamido donor ligands : organometallic chemistry and catalysis
(Massachusetts Institute of Technology, 1999) -
Halogen-elimination photochemistry and oxygen-activation chemistry of late transition-metal complexes
(Massachusetts Institute of Technology, 2012)Multi-electron reaction chemistry, from both ground- and excited-state species, is at the heart of many topics in renewable energy and catalysis. In this thesis, two classes of reactions central to the themes of energy ... -
Harnessing inorganic coordination chemistry for novel sensing applications
(Massachusetts Institute of Technology, 2016)We explore strategies to exploit the rich chemical reactivity available to inorganic coordination complexes in order to realize chemiresistive detectors, electronic device elements that undergo a change in resistance in ... -
Heavily fluorinated electronic polymers
(Massachusetts Institute of Technology, 2011)Building blocks, containing majority fluorine content by weight, for PPEs and PPVs have been synthesized. Some of the monomers were shown to give exclusively fluorous-phase soluble polymers, the syntheses of which were ... -
High field DNP and cryogenic MAS NMR : novel instrumentation and applications
(Massachusetts Institute of Technology, 2014)Solid State Nuclear Magnetic Resonance (ssNMR) spectroscopy has blossomed over the last two decades. As ssNMR is progressively applied to more challenging systems, the sensitivity remains one of its major limiting factors. ... -
High frequency (139.5 GHz) electron paramagnetic resonance spectroscopy of biomolecules
(Massachusetts Institute of Technology, 1996) -
High oxidation state molybdenum and tungsten imido alkylidene and metallacycle chemistry : catalytic asymmetric olefin metathesis and mechanistic investigation
(Massachusetts Institute of Technology, 2004)Enantiomerically pure molybdenum imido alkylidene complexes of the type Mo(NAr)(CHCMe₂Ph)[Ar'](THF), which contained 3,3'-diaryl (Ar' = Mes (21), Ph (22)) substituted binaphtholate ligands, were prepared and structurally ... -
High resolution NMR in solids.
(Massachusetts Institute of Technology, 1972) -
High-frequency time domain electron paramagnetic resonance : methods and applications
(Massachusetts Institute of Technology, 2004)There are numerous advantages to high frequency (high field) electron paramagnetic resonance (EPR) spectroscopy. Two of the most important are improved sensitivity and the improved resolution of field dependent interactions. ...
