Syntheses,Crystal Structures,and Photophysical Properties of Heteronuclear Zinc(II)/Cadmium(II)‐Lanthanide(III) Coordination Complexes based on Benzoic Acid |
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| Authors: | Yu‐Xian Chi Yu‐Qian Liu Xiao‐Shuang Hu Xiao‐Yun Tang Yu‐Juan Liu Jing Jin Shu‐Yun Niu Guang‐Ning Zhang |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, 116029, P. R. China;2. Institute of Chemistry for Functionalized Materials, Liaoning Normal University, Dalian, 116029, P. R. China |
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| Abstract: | The heteronuclear d‐f coordination complexes [Er2Zn2(C6H5COO)10(phen)2] (1), [Ho2Zn2(C6H5COO)10(phen)2] ( 2 ), [Pr3Zn6(C6H5COO)21(phen)3] ( 3 ), [ErCd(C6H5COO)5(phen)·H2O] ( 4 ), [Ho2Cd3(C6H5COO)12(phen)2] ( 5 ), [EuCd2(C6H5COO)7(phen)2] ( 6 ) (C6H5COOH = benzoic acid;phen = 1,10‐phenanthroline) were synthesized by hydrothermal methods, and their structures were studied by single‐crystal X‐ray diffraction. Complexes 1 , 2 , 4 , and 5 crystallize in the triclinic space group P$bar{1}$ and complexes 3 and 6 in the monoclinic space group C2/c. The room temperature IR, UV/Vis/NIR absorption, and emission spectra of the six complexes were determined and assigned. In the visible and NIR regions, the emission spectra of complexes show characteristic bands of corresponding LnIII ions, which are attributed to the sensitization from the d block (Zn/Cd‐ligand section) and ligands. In comparison with isolated LnIII ions, the NIR emission bands of complexes 1 – 5 exhibit shifting, broadening and splitting, which are also present in their UV/Vis/NIR absorption spectra. Thus, the two spectra of complexes can evidence each other. |
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| Keywords: | Zn/Cd‐Ln complexes Sensitization Photophysical properties Zinc Cadmium Lanthanides |
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