Abstract

A cuprous compound CuCl(2,2′-bipyridine)2·3.5H2O (1) has been prepared through a hydrothermal reaction and structurally characterized by single crystal X-ray diffraction. The crystal structure analysis revealed that compound 1 is characterized by an isolated structure, based on CuCl(2,2′-bipyridine)2 moieties and lattice water molecules. The Cu+ ion coordinates to four nitrogen ions of two 2,2′-bipyridine molecules and one terminal chloride ion. Photoluminescent study displays that compound 1 has strong and broad emission bands, in combination with the molecular orbital (MO) calculation of 1, lead us to conclude that the emissions originate from ligand-to-ligand charge transfer (LLCT) transition.

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