by Xin-Shan Ye. / Thesis (Ph.D.)--Chinese University of Hong Kong, 1996. / Includes bibliographical references (p. 136-148). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web.

Thesis (Ph. D.)--University of Oregon, 2008. / Typescript. Includes vita and abstract. Includes bibliographical references (leaves 271-294). Also available online.

Thesis (Ph. D.)--University of Nebraska, 1937. / Bibliography: p. 22.

No description available.

Thesis (M.S.)--Oregon State University, 2008. / Printout. Includes bibliographical references (leaves 79-83). Also available on the World Wide Web.

This document only includes an excerpt of the corresponding thesis or dissertation. To request a digital scan of the full text, please contact the Ruth Lilly Medical Library's Interlibrary Loan Department (rlmlill@iu.edu).

No description available.

No description available.

This work describes several thiophene-based molecular sensors and various modifications aimed to improve and understand the photophysical and supramolecular properties, such as the association constant (Ka) and selectivity, towards the development of a selective mercury(II) sensor. From the first generation of sensors containing pyridine and thiophene groups, it was determined that thiophene can offer good selectivity for mercury(II) against other transition metal ions, and provide a ratiometric absorption and fluorescent response. The projects following this focused on improving the Ka of the first generation of sensors through several different strategies. Substitution of thiophene for dibenzothiophene was shown to improve the Ka however this resulted in less than ideal photophysics of the dibenzothiophene sensors with absorption and emission in the UV-region. In addition to the effect of the chelating group was examined by incorporating imidazole, and thiazole rings, to compare to the original pyridyl chelating group employed. From this it was determined that pyridine offered the greatest Ka and selectivity for mercury(II). Following this electron-donating groups, including alcohol, octaethyleneglycol monomethyl ether, and amine, were added to a sensor, 2,5-bis(2-pyridyl)thiophene, as an alternative strategy to improving the Ka. Initially these functional groups were placed on the pyridine ring which caused a great increase in affinity for transition metal ions such as iron(II) and copper(II), however this translated to a loss in selectivity. In the final project I functionalized the thiophene ring with the same electron-donating groups which resulted in an increased Ka and maintained good selectivity for the mercury(II) ion, though iron(III) was still a competitive binder. In addition to this one of these thiophene functionalized sensors, 2,5-di(pyridin-2-yl)thiophene-3,4-diol, was shown to have a specific response to copper(II), iron(III), lead(II) and mercury(II) suggesting it could be used as a model for the development of a small-molecule multiplex sensor. Herein I will describe this work in greater detail and focus on the effects the modifications discussed had on the Ka and selectivity for the mercury(II) ion.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1993. / Vita. Abstract. Includes bibliographical references (leaves 39-40). Also available via the Internet.