Wen-Tong Chen,* Shao-Ming Ying, Ya-Ping Xu, Qiu-Yan Luo and Jiu-Hui Liu

School of Chemistry and Chemical Engineering, Jiangxi Province Key Laboratory of Coordination Chemistry, Jinggangshan University, 343009, Ji’an, Jiangxi, P.R. China
* Corresponding author: E-mail: wtchen_2000@yahoo.cn

Abstract
(4,4’-H₂bipy)[CdI₄]·H₂O (1) has been synthesized via hydrothermal reaction and characterized by single crystal X-ray diffraction. The crystal belongs to monoclinic, space group P2₁/c with a = 8.3935(6), b = 24.304(2), c = 9.9388(7) Å, β = 106.230(1)°, C₁₀H₁₂CdI₄N₂O, Mr = 796.22, V = 1946.6(2) Å3, Z = 4, Dc = 2.717 g/cm3, S = 1.080, μ(MoK α) = 7.458 mm^–1, F(000) = 1416, R = 0.0439 and wR = 0.1455. The crystal structure analysis of 1 reveals that the title compound features an isolated structure, based on discrete 4,4’-H2bipy moieties, lattice water molecules and tetrahedral cadmium atoms terminally coordinated by four iodine atoms. The 4,4’-H₂bipy moieties and lattice water molecules are linked via hydrogen bonds. Luminescent investigation reveals a strong emission in blue region, which may be originating from π → π* charge-transfer interaction of the 4,4-H₂bipy.

Keywords: Cadmium, crystal structure, bipy, photoluminescence