Syntheses,crystal structures and fluorescent properties of imidazole based mixed-ligand nickle and cadmium complexes |
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| Authors: | Xiao Ma Zi-Yue Chen Shu-Yu Li Hua-Lin Chen Quan-Liang Chen |
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| Affiliation: | 1. Key Laboratory of Basic Chemistry of the State Ethnic Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu, 610041, China;2. School of Ocean and Earth Science, Tongji University, Shanghai, 200092, China |
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| Abstract: | Four novel mixed-ligand nickle and cadmium complexes [Cd(tolu)2(imi)3] (1) [CdCl2(imi)2]n (2), [Ni(imi)6](tolu)2 (3) and [Ni(mand)2(imi)2]·H2O (4) (imi = imidazole, Htolu = o-toluic acid, Hmand = mandelic acid) were synthesized and isolated in solid state based on nickle and cadmium salts, imidazole and different carboxylic acids. These complexes were characterized by FT-IR, elemental analyses, thermogravimetric (TG) analyses, UV–vis, X-ray structural analyses and fluorescence spectra. Complexes 1 and 4 are neutral mixed-ligand molecules. Complex 2 exhibits a 2D chain constructed by [CdCl2(imi)2] units. Complex 3 possesses [Ni(imi)6]2- anions with uncoordinated tolulate anions. In complexes 1–4, each imidazole ligand provides one nitrogen atom for coordination. Tolulate and mandelate ligands coordinate to the metal through carboxyl oxygen or hydroxyl oxygen atoms. Plenty of intramolecular hydrogen bonds as N–H?O and O–H?O interactions are observed in these complexes. Fluorescence properties of the complexes have been deeply investigated and the result reveals that Fe3+ ion has the greatest effect on fluorescence intensity of complex 3. The fluorescence intensity decreases with the increase of iron concentration. |
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| Keywords: | Nickle Cadmium Imidazole Crystal structure Fluorescence property |
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