Copper(II) complexes based on 4′-R-terpyridine: Synthesis, structures, and photocatalytic properties

Abstract

Complexes Cu(II)(4′-R-terpyridine)2(ClO4)2[R=2-thienyl(1), 2-(5-bromothienyl)(2), 2-(5-methyl-thienyl)(3) and 2-(5-methoxythienyl)(4)] were synthesized, and their structures were determined by single-crystal X-ray diffraction analyses and were further characterized by high resolution mass spectrometry, infrared spectrosco-py(IR), as well as elemental analysis. Single crystal X-ray diffraction analysis shows that Cu(II) ions in the complexes are both six-coordinated with N6 coordination sphere, displaying distorted octahedral geometries. In addition, the UV-Vis absorption spectra show that the four complexes all exhibit absorption components in both UV and visible light regions. Thus, the photocatalytic activities of the four complexes in the degradation of organic dyes were investigated.