Synthesis, Structure and Luminescent Properties of Rare Earth Coordination Polymers Constructed from Paddle-Wheel Building Blocks

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• 作者：Xiaodan Guo ; Guangshan Zhu ; Qianrong Fang ; Ming Xue ; Ge Tian ; Jinyu Sun ; Xiaotian Li ; and Shilun Qiu
• 刊名：Inorganic Chemistry
• 出版年：2005
• 出版时间：May 30, 2005
• 年：2005
• 卷：44
• 期：11
• 页码：3850 - 3855
• 全文大小：317K
• 年卷期：v.44,no.11(May 30, 2005)
• ISSN：1520-510X

文摘

A series of three-dimensional (3D) novel coordination polymers M(bpdc)_1.5(H₂O)·0.5DMF (M = Tb (1), Ho (2), Er(3), or Y (4)) have been synthesized by reaction of the rare earth ions (M³⁺) with 4,4'-biphenyldicarboxylic acid(H₂bpdc) in a mixed solution of DMF and C₂H₅OH. They possess the same 3D architectures and crystallize inmonoclinic space group C2/c. Two seven-coordinated metal centers and four dimonodentate bpdc groups constructa paddle-wheel building block. These building blocks connect with two carboxyl groups to lead to a one-dimensionalinorganic chain, ---M-O-C-O-M---, along the [001] direction. The inorganic chains are linked with two biphenylgroups to form 25.15 Å × 17.09 Å rhombic channels along the c axis without interpenetration. These complexesexhibit strong fluorescence in the visible region, and complex 3 shows Er³⁺ characteristic emission in the range of1450-1650 nm at room temperature. These complexes could be anticipated as potential fluorescent probes andan IR-emitter, respectively.