TiO2-coated conducting glass electrodes can be modified by attachment of redox-active molecules to the TiO2 surface. This thesis describes the synthesis and characterization of a polypyridyl Ru(II) complex that can be covalently bound to a TiO2 surface through the carboxylate groups of 2,2'-bipyridine-4,4' -dicarboxylic acid, H2dcbpy. In addition, the bound complex contains a redox-active alloxazine derivative, pptd, which is capable of 2e-/2H+ transfers. Thus the TiO2-coated electrode is modified with a transition metal complex capable of shuttling H-atoms to substrates in solution. Synthesis of the PF6- salt of this complex, [RuII(H2dcbpy)2pptd](PF6)2, proved challenging due to the difficulties in obtaining starting materials of sufficient purity. Details of the efforts to purify these materials are included. UV-Vis, 1H-NMR, and electrochemical characterization of [RuII(H2dcbpy)2pptd](PF6)2, and its adsorption to TiO2 electrodes, are included in the thesis. In addition, several well-known reference compounds have been characterized for comparison purposes.
Date of Award | 2003 |
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Original language | American English |
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Awarding Institution | - Eastern Illinois University
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Supervisor | Mark E. McGuire (Supervisor) |
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Synthesis and Characterization of a Polypyridyl Ru(II)-Alloxazine Complex for Adsorption on TiO2-coated ITO Electrodes
Patel, M. A. (Author). 2003
Student thesis: Master's Thesis › Master of Science (MS)