Abstract
Porphyrins have received the considerable attention because of their electron-transfer processes, photo-physics, biological processes and catalytic behaviors. This rapid development derives from their strong delocalization of π electron and conjugated macrocycles. The control of orientation of porphyrin chromophores can play a very important role. The functions of materials are related to the molecular alignments as well as the molecular structures. There were a number of reports on tetraphenylporphyrin derivatives, but those bearing the meso-substituted p-formyl-ferrocene group have been studied very little. In this paper, a symmetrical porphyrin with p-formyl-ferrocene group tetra(p-formylester-ferrocene-3-ethoxyphenyl)phenylporphyrin, was de- signed and synthesized through tetra(4-hydroxy-3-ethoxyphenal) porphyrin and formyl-ferrocene in CH_2Cl_2. The structure of tetra(p-formylester-ferrocene-3-ethoxyphenyl) phenylporphyrin was confirmed by UV-Vis, IR and 1H NMR spectra. The UV-Vis absorption and fluorescence spectra indicated weak electronic interaction in ground state and strong electronic interaction in excited state between the ferrocene donors and the porphyrin acceptors. The cyclic voltammetry indicated that ferrocene substituents have a significant effect on the redox potentials.
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