Cd(II) Complexes of 2,2':6',2''‐Terpyridine Substituted at 4'‐Position with Thienyl Groups: Synthesis, Structures, Luminescence, and Photocatalytic Activities

Abstract

Four new complexes, namely Cd(II)(4'‐(2‐(5‐R‐thienyl))‐terpyridine)2(ClO4)2 (R = hydrogen (1), bromo (2), methyl (3), and methoxy (4)), were synthesized and characterized by high‐resolution mass spectrometry, infrared (IR) spectroscopy, and elemental analysis. Complexes 2 and 4 were further characterized by single‐crystal X‐ray diffraction analysis, which showed that the Cd(II) ions in complexes 2 and 4 are both six‐coordinated with the N6 coordination sphere, displaying distorted octahedral geometries. The luminescence of complexes 1–4 was studied. Moreover, the photocatalytic properties of complexes 1–4 were investigated and compared with those of their parent complex Cd(II)(terpyridine)2(ClO4)2.