A novel europium coordination polymer based on mixed carboxylic acid ligands: Synthesis,structure and luminescence |
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| Affiliation: | 1. College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China;2. College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471022, China;3. College of Chemistry and Pharmacy Engineering, Nanyang Normal University, Nanyang 473601, China |
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| Abstract: | A novel europium complex, formulated as {[Eu4(H3Pimda)4 (Himba)2·4H2O]·4H2O}n (1) (H3Pimda = 2-propyl-1H-imidazole-4,5-dicarboxy acid, and Himba = 4-(1H-imidazole-1-ly) benzoic acid), has been obtained by the hydrothermal reaction. Single crystal X-ray diffraction analysis shows that complex 1 exhibits one-dimensional (1-D) ribbon-double chain composed of tetranuclear europium clusters, and these chains are further linked by Himba ligands into the 2-D corrugated layer arrays. Complex 1 exhibits efficiently sensitized red luminescence in visible region in N,N-dimethyl formamide (DMF) based on characterization emission of europium(III) ion. When Cd(NO3)2 is dropped in the DMF suspension of 1, the luminescence intensity increases linearly, rapidly, which indicates it may be employed as a fluorescent ratiometric probe for detection pollutant Cd(II) anion. In addition, complex 1 is characterized by elemental analysis, IR spectra, thermogravimetric (TG) analysis and PXRD measurement. |
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