Cadmium(II) chloride complexes of imidazole-based ligands: Solvothermal syntheses, crystal structures and luminescent properties

Presented are the solvothermal syntheses, structures, characterizations, and luminescent properties of four novel organic-modified cadmium chloride complexes constructed from CdCl2 and imidazole (or its derivatives), namely [CdCl2(Im)(4)] (1, Im = imidazole), [CdCl4(HAPI)(2)] (2, API = N-(3-Aminopropyl)-imidazole), [Cd(mu-Cl)(2)(1-Mim)(2)](infinity) (3, 1-Mim = 1-methyl imidazole) and [CdCl3(HAPI)](infinity) (4). 1 and 2 feature a zero dimensional (OD) mononuclear structure with different mole ratios of Cd: Cl: ligand, while compound 3 and 4 bear infinite chains constructed from different subunits and connection modes. Worthy of note is that 4 represents a new structural type in the family of organic modified cadmium halides. The fluorescence spectra showed that compounds 1-4 exhibited emission peaks around 450 nm with the quantum yields of 23.01%, 5.84%, 27.31%, 5.71%, respectively. (C) 2017 Elsevier B.V. All rights reserved.