基于锌卟啉取代二芳基乙烯的分子镊子

Molecular tweezer based on zinc porphyrin-substituted diarylethene.

作者信息

Park Ji Eun, Shin Eun Ju

机构信息

Department of Chemistry, Sunchon National University, Sunchon, Chonnam, Republic of Korea.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2007 Nov;68(3):554-60. doi: 10.1016/j.saa.2006.12.027. Epub 2006 Dec 22.

DOI:10.1016/j.saa.2006.12.027

PMID:17329155

Abstract

A molecular tweezer, zinc porphyrin-dithienylethene-zinc porphyrin (ZnP-DTE-ZnP) triad, has been prepared. Triad ZnPor-DTE-ZnPor showed a little electronic communication among the chromophores judged from the comparison of the steady-state absorption and fluorescence spectra for triads and their component compounds. Irradiation of ZnPor-DTE-ZnPor with UV light converts dithienylethene moiety from open form to closed form. The complexation of ZnP-DTE-ZnP with 4,4'-bipyridyl were investigated by absorption and fluorescence spectroscopic measurements. ZnP-DTE-ZnP forms a 1:1 complex with 4,4'-bipyridyl. The stability constants of log K=4.0 and 4.2 mol(-1)dm3 were determined by absorption and fluorescence spectral changes, respectively.

摘要

已制备出一种分子钳，即锌卟啉-二噻吩乙烯-锌卟啉（ZnP-DTE-ZnP）三元组。从三元组及其组成化合物的稳态吸收光谱和荧光光谱的比较判断，三元组ZnPor-DTE-ZnPor在发色团之间显示出微弱的电子通信。用紫外光照射ZnPor-DTE-ZnPor会使二噻吩乙烯部分从开放形式转变为封闭形式。通过吸收光谱和荧光光谱测量研究了ZnP-DTE-ZnP与4,4'-联吡啶的络合作用。ZnP-DTE-ZnP与4,4'-联吡啶形成1:1络合物。分别通过吸收光谱和荧光光谱变化测定的log K = 4.0和4.2 mol(-1)dm3的稳定常数。