Abstract
In this communication, we report the synthesis of triarylamine-conjugated bis(dipyrrinato)zinc(II) complexes 1 and 2, and disclose their photochemical and electrochemical properties. The structures of 1 and 2 were determined by means of single-crystal X-ray structure analysis. The effect of the triarylamine moieties on the UV-vis spectra of 1 and 2 was not large, although it significantly quenched the fluorescence of 1 and 2. Cyclic voltammetry and differential pulse voltammetry revealed that 1 and 2 underwent oxidation up to four electrons. Since they bear two triarylamine entities and two dipyrrinato ligands, the oxidation is assignable to the one-electron oxidation processes of each of the four moieties. The redox reversibility was much higher in 2 than that in 1. The introduction of ethyl groups on the 2 and 6 positions of dipyrrin moieties contributed to the enhancement of the electrochemical reversibility.
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