Abstract
The self-assembly of a viologen ligand, 1, 1′ -bis((3-carboxylatobenzyl)-4,4′-bipyridinium)-dichloride (H2bcbpy·2Cl), cadmium chloride and terephthalic acid (PTA) has successfully afforded a photo- and thermochromic coordination polymer, [Cd(bcbpy)0.5(PTA)(H2O)] (Cd-BCP), which was characterized by single-crystal X-ray diffraction, powder X-ray diffraction and thermogravimetric analysis. The complex Cd-BCP shows high sensitivity to ultraviolet-visible radiation and heat. Cd-BCP exhibits the rare difunctional properties of both electron-transfer (ET) photochromism and ET thermochromism. Interestingly, Cd-BCP exhibits photocontrolled luminescence properties during the coloration–decoloration process.
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