Publication Date

Spring 2024

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Chemistry

Advisor

David Brook; Madalyn Radlauer; Roger Terrill

Abstract

Verdazyls are a class of azine-like free radicals with redox-active properties. The verdazyl used throughout this project was 1-isopropyl-3,5-dipyridyl-6-oxoverdazyl (or dipyvd). This verdazyl was coordinated in a stepwise manner with platinum-group metals ruthenium and rhodium, all done at a 1:2 metal-ligand ratio. These complexes were characterized through spectroscopic methods. Infrared spectroscopy demonstrated the verdazyl carbonyl stretch shifts from 1685 cm-1 to 1697 cm-1 and 1725 cm-1 for rhodium and ruthenium bis-dipyvd complexes respectively upon coordination. Absorbance maxima for rhodium bis-dipyvd had maxima 440 and 714 nm, while ruthenium bis-dipyvd were at 544 and 710 nm. Cyclic voltammetry yielded redox potentials of 0.15 and 0.43 V in rhodium bis-dipyvd, but -0.03 V, 0.36 V, and 0.79 V for ruthenium bis-dipyvd. Spectroscopic results and redox potentials were further compared with similar complexes from literature, and those made from our group. In addition, the crystal structure was assessed on the rhodium complex, while magnetic susceptibility was measured on the ruthenium complex.

Available for download on Friday, August 20, 2027

Included in

Chemistry Commons

Share

COinS