The effect of imidazole on the electrochemistry of zinc porphyrins: An electrochemical and computational study

10^TH ANNUAL Chemistry & Mass Spectrometry Congress

OCTOBER 18-19, 2017 OSAKA, JAPAN

Yuhlong Oliver Su

National Chi Nan University, Taiwan

Posters & Accepted Abstracts: Chem Sci J

Abstract :

In this study, the electrochemical behavior of zinc meso-substituted porphyrins in the presence of imidazole is examined by using both Cyclic Voltammetry (CV) and Density Functional Theory (DFT) methods. The results show that the first half-wave oxidation potentials (1st E1/2) of zinc porphyrins complexed with imidazole all move to negative side while the second ones (2nd E1/2) move positive side, resulting in larger half-wave oxidation potential splitting of the two oxidation states (��?E=second E1/2 - first E1/2) comparing with the zinc porphyrins. By employing DFT calculations, we have found that both sterically controlled inter �?-conjugation between porphyrin rings and meso-substituted phenyl groups and deformation of porphyrin rings do play important roles in contributing to the half-wave oxidation potentials. Imidazole exhibits strong effects the deformation of porphyrin rings which determine the 1st E1/2 while inter �?-conjugation between porphyrin rings and mesosubstituted phenyl groups mainly contributes to the 2nd E1/2. Without imidazole, inter �?-conjugation between porphyrin rings and meso-substituted phenyl groups is the only important criterion which effects both 1st E1/2 and 2nd E1/2 of zinc porphyrins.

Biography :

Yuhlong Oliver Su has completed his PhD at The Ohio State University and worked as Research Associate at Princeton University. He is currently the Professor of Chemistry and President of National Chi Nan University. He has published more than 82 papers in reputed journals.
Email:yosu@ncnu.edu.tw