Synthesis, Structure, White-Light Emission, and Temperature Recognition Properties of Eu/Tb Mixed Coordination Polymers

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• 作者：Ran An ; Hui Zhao ; Huai-Ming Hu ; Xiaofang Wang ; Meng-Lin Yang ; Ganglin Xue
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：January 19, 2016
• 年：2016
• 卷：55
• 期：2
• 页码：871-876
• 全文大小：503K
• ISSN：1520-510X

文摘

Two series of Eu^III/Tb^III coordination polymers, [LnL(glu)]_n·2nH₂O (Ln = Eu (1), Tb (2)) and [LnL(glu)(H₂O)]_n (Ln = Eu (3), Tb (4)) [HL = (2-(2-sulfophenyl)imidazo(4,5-f)(1,10)-phenanthroline, H₂glu = glutaric acid] have been hydrothermally synthesized by controlling the pH values and characterized by elemental analysis, infrared spectra, and single-crystal X-ray diffraction. Isomorphic compounds 1 and 2 exhibit 6-connected 3D network with the pcu topological net, containing left- and right-handed helical chains. Isomorphic compounds 3 and 4 show 3,4-connected 2D new topology with the point symbol of (4²·6³·8)(4²·6). Multicolor luminescence can be tailored from red to green regions by singly varying the mixing molar ratio of Eu^III/Tb^III cations. The mixing component of 1Eu/2Tb = 4:6 not only achieves white-light emission with the CIE coordinate of (0.323, 0.339) upon excitation at 405 nm but also presents a temperature recognition property with the significantly high sensitivity of 0.68% per K in the 50–225 K temperature range upon excitation at 370 nm.