Syntheses and Photochromic Studies of Dithienylethene-Containing Imidazolium Derivatives and Their Reactivity towards Nucleophiles
作者:Gongping Duan、Nianyong Zhu、Vivian Wing-Wah Yam
DOI:10.1002/chem.201001319
日期:2010.11.22
studied, and the closed forms are found to be solvatochromic due to the donor–acceptor interaction with the solvent molecules. The closed form of the imidazolium salt shows a much higher affinity towards nucleophiles over the open form of the salt. A reaction pathway has been proposed to account for this reactivity difference based on the structure–property relationship, and the possible structure
A series of half-sandwich type ruthenium(II) complexes, [(η6-mesitylene)Ru(NHC-L)Cl]PF6 (NHC = N-heterocyclic carbene, L = azole and imine ligand), containing the dithienylethene moiety has been synthesized and characterized by 1H NMR, X-ray crystallography and electronic absorption spectroscopy. These complexes show photochromic properties upon UV photo-irradiation to generate the closed forms of the dithienylethene moiety.