ACS Appl Mater Interfaces. 2016 Feb 17;8(6):3853-60. doi: 10.1021/acsami.5b10587. Epub 2016 Feb 03.

Phosphonate-Derivatized Porphyrins for Photoelectrochemical Applications.

ACS applied materials & interfaces

Animesh Nayak, Subhangi Roy, Benjamin D Sherman, Leila Alibabaei, Alexander M Lapides, M Kyle Brennaman, Kyung-Ryang Wee, Thomas J Meyer

PMID: 26788585 DOI: 10.1021/acsami.5b10587

Abstract

A series of phosphonate-derivatized, high redox potential porphyrins with mesityl, pentafluorophenyl, and heptafluoropropyl meso-substituents were synthesized by acid-catalyzed condensation reactions. Ground and excited state redox potentials in the series were varied systematically with the electron-donating or electron-accepting nature of the meso-substitutents. The extent of excitation and injection by porphyrin singlet excited states surface-bound to SnO2/TiO2 core/shell metal oxide nanoparticle films varies with the excited state reduction potential, E°(')(P(+)/P*). With the mesityl-substituted porphyrin, high current density and sustained photocurrents are observed at pH 7 with the addition of the electron transfer donor hydroquinone.

Keywords: chromophore; electron injection; excited state potential; photocurrent; porphyrin

Publication Types

• Journal Article
• Research Support, U.S. Gov't, Non-P.H.S.