A photochromic dithiazolylethene was used as bridging ligand to synthesize a series of homometallic binuclear complexes. It was found that the photochromic activity of the bridging ligand was maintained in solution only in the case of the copper binuclear complex. EPR studies revealed not only a weak magnetic coupling between the two copper ions, but also an interesting photo-controlled release and
Two new dithiazolylethenes, 1a 1,2-bis[5′-methyl-2′-(2′′-pyridyl)thiazolyl]perfluorocyclopentene} and 2a 1,2-bis[4′-methyl-2′-(2′′-pyridyl)thiazolyl]perfluorocyclopentene}, have been synthesized. Their photochromic behavior has been fully investigated in solution as well as in the crystalline phase. They display both fatigue-resistant and thermally irreversible photochromic reactions, with more than
Photochromic properties of the tilted compound could be easily tuned by simple oxidation of the peripheral pyridine groups by mCBPA. The mono- and bis-oxidized dithiazolylethenes were found to display both Solution and single crystalline state photochromisms. (C) 2009 Elsevier Ltd. All rights reserved.