Degree Name

Master of Science (MS)

Semester of Degree Completion

1995

Thesis Director

Mark E. McGuire

Abstract

This thesis describes the synthesis of the transition metal complex [(bpy) 2OsII (pptd)] (PF6)2·2H2O, an analog of [(bpy) 2RuII (pptd)] (PF6)2·2H2O. Spectroscopic and electrochemical data on this complex are reported here. It was found that the electronic communication between the metal center and the pteridinedione portion of pptd did not appear to be enhanced in the Os(II) complex relative to its Ru(II) analog. The increased ability of Os(II) to undergo backbonding appeared to affect only the 1,10-phenanthroline portion of pptd.

A useful starting material cis-RuII (pptd) 2Cl2·2H2O was synthesized and studied. This complex had a MLCT band that was blue shifted by 18 nm relative to the bpy analog. It was also found that this complex was harder to oxidize than the bpy analog.

A third project, the synthesis of a new ligand, "phanq" (by condensation of 1,10-phenanthroline-5,6-dione and 1,2-diaminoanthraquinone) is described in an Appendix.

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