Construction, Photophysical and Electrochemical Studies on Ferrocene-phthalocyanine-fullerene Supramolecular Triads

Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (5): 933.

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Construction, Photophysical and Electrochemical Studies on Ferrocene-phthalocyanine-fullerene Supramolecular Triads

ZHAO Hai-Ying^1,2, CHEN Chen¹, ZHU Yi-Zhou¹, ZHENG Jian-Yu^1*

1. State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China;
2. College of Chemistry and Chemical Engineering, Inner Mongolia University, Huhhot 010021, China

Online:2010-05-10 Published:2010-05-10
Contact: ZHENG Jian-Yu. E-mail: jyzheng@nankai.edu.cn
Supported by:
国家“九七三”计划项目(批准号: 2006CB932900)、国家自然科学基金(批准号: 20802038, 20721062)和天津市科技计划项目(批准号: 07QTPTJC29700)资助.

Abstract

Abstract:

Much attention has been paid recently to the studies on photoinduced electron transfer in donor acceptor systems mainly to develop artificial photosynthetic systems and molecular optoelectronic devices. Several covalent and supramolecular phthalocyanine-fullerene systems have been prepared for this purpose, but only a few triads have been reported to date. In this article, ferrocene-phthalocyanine-fullerene supramolecular triads were constructed with pyridine- or imidazole-appended fulleropyrrolidine and covalently linked zinc phthalocyanine-ferrocene dyad via axial coordination. The stablilities of the triads(K_assoc=8.58×10⁴ L/mol) were studied by optical absorption methods. Steady-state and time-resolved fluorescence measurements suggested that the occurrence of efficient photoinduced electron transfer(k_CS =109 s^-1) from excited phthalocyanine to fullerene entity in the triads with high charge-separation quantum yields(Ф_CS =0.88). The redox potentials were determined by cyclic voltammetric, and the driving forces(ΔG_CS =-0.60 eV) were estimated to be exothermic, which favored the forming of charge-separation state.

Key words: Ferrocene; Phthalocyanine; Fullerene; Supramolecular triad; Photoinduced electron transfer

TrendMD:

ZHAO Hai-Ying, CHEN Chen, ZHU Yi-Zhou, ZHENG Jian-Yu*. Construction, Photophysical and Electrochemical Studies on Ferrocene-phthalocyanine-fullerene Supramolecular Triads[J]. Chem. J. Chinese Universities, 2010, 31(5): 933.

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Construction, Photophysical and Electrochemical Studies on Ferrocene-phthalocyanine-fullerene Supramolecular Triads

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