Phosphonate-Derivatized Porphyrins for Photoelectrochemical Applications

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• 作者：Animesh Nayak ; Subhangi Roy ; Benjamin D. Sherman ; Leila Alibabaei ; Alexander M. Lapides ; M. Kyle Brennaman ; Kyung-Ryang Wee ; Thomas J. Meyer
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：February 17, 2016
• 年：2016
• 卷：8
• 期：6
• 页码：3853-3860
• 全文大小：447K
• ISSN：1944-8252

文摘

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.