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2D Lanthanide Coordination Polymers: Synthesis, Structure, Luminescent Properties, and Ratiometric Sensing Application in the Hydrostable PMMA-Doped Hybrid Films
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-03-06 , DOI: 10.1021/acsapm.0c00052 Xue-Qin Song 1 , Huan-Huan Meng , Zeng-Gang Lin , Li Wang 2, 3
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-03-06 , DOI: 10.1021/acsapm.0c00052 Xue-Qin Song 1 , Huan-Huan Meng , Zeng-Gang Lin , Li Wang 2, 3
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Three LnIII coordination polymers [LnL(NO3)3]n·2C4H8O2 (LnL, Ln = Nd, NdL; Eu, EuL; Tb, TbL) based on an asymmetric polymonodentate ligand L, which has abundant branched end groups for chelating LnIII ions and strong light-harvesting ability to sensitize lanthanide luminescence, have been prepared and well characterized. Single-crystal X-ray diffraction studies reveal that they are isomorphic and feature unique undulated two-dimensional (2D) networks where ligand L acted as asymmetric trimonodentate connectors to bind three LnIII ions. Solid-state luminescence determination indicates that TbL emits bright green lights while EuL shows both EuIII-based red emission and L-based blue emission. For EuL, white emission with CIE coordinates of (0.3280, 0.3471) and (0.3441, 0.3236) was obtained upon excitation at 285 and 345 nm, which are close to the NTSC (National Television System(s) Committee) standard value for white emission. In addition, poly(methyl methacrylate) (PMMA) films doped with EuL and TbL (EuL@PMMA and TbL@PMMA) were developed to improve their luminescence performance, thermal stability, and water resistance. With the aid of the PMMA matrix, the emission with the CIE coordinates of (0.3304, 0.3119), which was much closer to the standard white light than that of EuL, resulted when EuL@PMMA was excited at 296 nm. Prominently, both EuL@PMMA and TbL@PMMA exhibited ratiometric emission responses toward Zn2+ selectively in water and could in-site detect Zn2+ to render them as ratio luminescence sensors for Zn2+ in aqueous solution.
中文翻译：
2D镧系配位聚合物：合成，结构，发光性能和比例感测应用在耐水PMMA掺杂的杂化膜中。
三LN III的配位聚合物[LNL（NO 3）3 ] ñ ·2C 4 H ^ 8 ø 2（LNL，Ln为钕，NDL ;铕，EUL Tb时，; TBL）基于不对称polymonodentate配体大号，它具有丰富的支链已经制备并很好地表征了用于螯合Ln III离子的端基和对镧系元素发光敏感的强光捕获能力。单晶X射线衍射研究表明，它们是同构的，具有独特的起伏二维（2D）网络，其中配体L充当不对称三单齿连接器以结合三个Ln III离子。固态发光测定表明，TbL发出亮绿色的光，而EuL则同时显示基于Eu III的红色发射和基于L的蓝色发射。对于EuL，在285和345 nm处激发时，获得了CIE坐标为（0.3280，0.3471）和（0.3441，0.3236）的白色发射，这接近NTSC（国家电视系统委员会）的白色发射标准值。另外，掺杂有EuL和TbL的聚（甲基丙烯酸甲酯）（PMMA）膜（EuL @PMMA和TbL开发用于改善其发光性能，热稳定性和防水性的产品。借助于PMMA矩阵，当EuL @PMMA在296 nm处激发时，CIE坐标为（0.3304，0.3119）的发射比EuL的发射更接近标准白光。突出的是，EuL @PMMA和TbL @PMMA均在水中选择性地表现出对Zn 2+的比率发射响应，并且可以现场检测Zn 2+使其成为水溶液中Zn 2+的比率发光传感器。
更新日期：2020-04-23
中文翻译：
2D镧系配位聚合物：合成，结构，发光性能和比例感测应用在耐水PMMA掺杂的杂化膜中。
三LN III的配位聚合物[LNL（NO 3）3 ] ñ ·2C 4 H ^ 8 ø 2（LNL，Ln为钕，NDL ;铕，EUL Tb时，; TBL）基于不对称polymonodentate配体大号，它具有丰富的支链已经制备并很好地表征了用于螯合Ln III离子的端基和对镧系元素发光敏感的强光捕获能力。单晶X射线衍射研究表明，它们是同构的，具有独特的起伏二维（2D）网络，其中配体L充当不对称三单齿连接器以结合三个Ln III离子。固态发光测定表明，TbL发出亮绿色的光，而EuL则同时显示基于Eu III的红色发射和基于L的蓝色发射。对于EuL，在285和345 nm处激发时，获得了CIE坐标为（0.3280，0.3471）和（0.3441，0.3236）的白色发射，这接近NTSC（国家电视系统委员会）的白色发射标准值。另外，掺杂有EuL和TbL的聚（甲基丙烯酸甲酯）（PMMA）膜（EuL @PMMA和TbL开发用于改善其发光性能，热稳定性和防水性的产品。借助于PMMA矩阵，当EuL @PMMA在296 nm处激发时，CIE坐标为（0.3304，0.3119）的发射比EuL的发射更接近标准白光。突出的是，EuL @PMMA和TbL @PMMA均在水中选择性地表现出对Zn 2+的比率发射响应，并且可以现场检测Zn 2+使其成为水溶液中Zn 2+的比率发光传感器。
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