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.
Recommended Citation
Herrera, Alejandro G., "Coordination, Studies of Novel Homoleptic Platinum-Group Metal-Dipyridyl Verdazyl Complexes and Their Bistable Structures" (2024). Master's Theses. 5505.
DOI: https://doi.org/10.31979/etd.n5qj-ebtq
https://scholarworks.sjsu.edu/etd_theses/5505
