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 CdCl 2 and imidazole (or its derivatives), namely [CdCl 2 (Im) 4 ] ( 1 , Im = imidazole), [CdCl 4 (HAPI) 2 ] ( 2 , API = N-(3-Aminopropyl)-imidazole), [Cd( μ -Cl) 2 (1-Mim) 2 ] ∞ ( 3 , 1-Mim = 1-methyl imidazole) and [CdCl 3 (HAPI)] ∞ ( 4 ). 1 and 2 feature a zero dimensional (0D) 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. [ABSTRACT FROM AUTHOR]