title: Molecular tweezer based on zinc porphyrin-substituted diarylethene.
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.
authors.affiliation: Department of Chemistry, Sunchon National University, Sunchon, Chonnam, Republic of Korea.
authors.forename: Ji Eun
authors.initials: JE
authors.lastname: Park
authors.forename: Eun Ju
authors.initials: EJ
authors.lastname: Shin
mesh_terms: D005030:Ethylenes / Q000737:chemistry*; D007700:Kinetics; D008665:Metalloporphyrins / Q000737:chemistry*; D008752:Methylene Chloride / Q000737:chemistry; D013050:Spectrometry, Fluorescence
chemical_list: D005030:Ethylenes; D008665:Metalloporphyrins; C017802:zinc hematoporphyrin; D008752:Methylene Chloride