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Polymers for electronics and chemical sensing applications
(Massachusetts Institute of Technology, 2006)
The incorporation of molecular structures such as shape persistent molecular frameworks, strong hydrogen bond donor groups or perfluoro-alkyl groups can result in considerable gains in the performance of some established ...
Snapshots of radical enzyme catalysis : the crystal structures of biotin synthase and lysine 5,6-aminomutase
(Massachusetts Institute of Technology, 2004)
(cont.) in the same pathway. To further probe the relationship of the adenosylmethionine and adenosylcobalamin-dependent radical enzymes, the crystal structure of lysine 5,6-aminomutase was determined to 2.8 [angstroms] ...
Catalytic enantioselective synthesis of oxindoles and benzofuranones bearing a quaternary stereocenter and reactions of palladium bisphosphine complexes relevant to catalytic C-C bond formation
(Massachusetts Institute of Technology, 2004)
In Part I the development of a new method for the construction of oxindoles and benzofuranones bearing quaternary stereocenters is discussed. A planar-chiral PPY derivative catalyzes the O-to-C acyl group migration (Black ...
Model complexes for active sites of diiron metalloproteins, dioxygen reactivity and water effects
(Massachusetts Institute of Technology, 2004)
(cont.) tetrairon(II) cubane complex was identified and structurally characterized. Chapter 4: Synthesis and Characterization of [Fe₂...CR)]³⁺ and [Fe₂...CR)]³⁺ Complexes with Carboxylate-Rich Metal Coordination Environment ...
Mechanism of the efficient quenching of tryptophan fluorescence in human gamma crystallin
(Massachusetts Institute of Technology, 2008)
Quenching of the fluorescence of buried tryptophans (Trps) is an important reporter of protein conformation. Human [gamma]D-crystallin (H[gamma]D-Crys) and human [gamma]S-crystallin (H[gamma]S-Crys) are both very stable ...
Synthesis, structure, and magnetic properties of spin-1/2 kagomé antiferromagnets
(Massachusetts Institute of Technology, 2008)
Stoichiometrically pure S = 1/2 Cu2+ kagomé materials have been synthesized. Such materials provide an ideal venue for exploration of quantum states on a kagomé because they exhibit strong geometric spin frustration and ...
Novel II-IV semiconductor nanocrystal gain media : from amplified spontaneous emission to lasing
(Massachusetts Institute of Technology, 2002)
This thesis details efforts in using cadmium selenide (CdSe) nanocrystallites (NCs) as a novel lasing media. We begin with the synthesis of polymer/NC composites, in which the NCs are stabilized within a long-chain ...