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首页> 外文期刊>Chemistry: A European journal >Di- and Triphosphate Recognition and Sensing with Mono- and Dinuclear Fluorescent Zinc(II) Complexes: Clues for the Design of Selective Chemosensors for Anions in Aqueous Media
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Di- and Triphosphate Recognition and Sensing with Mono- and Dinuclear Fluorescent Zinc(II) Complexes: Clues for the Design of Selective Chemosensors for Anions in Aqueous Media

机译：单和双核荧光锌（II）配合物对二磷酸酯和三磷酸酯的识别和传感：设计用于水性介质中阴离子的选择性化学传感器的线索

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摘要

The synthesis of a new ligand (L1) containing two 1,4,7-triazacyclononane ([9]aneN(3)) moieties linked by a 4,5-dimethylenacridine unit is reported. The binding and fluorescence sensing properties toward Cu2+, Zn2+, Cd2+, and Pb2+ of L1 and receptor L2, composed of two [9]aneN(3) macrocycles bridged by a 6,6''-dimethylen-2,2': 6', 2''-terpyridine unit, have been studied by coupling potentiometric, UV/Vis absorption, and emission measurements in aqueous media. Both receptors can selectively detect Zn2+ thanks to fluorescence emission enhancement upon metal binding. The analysis of the binding and sensing properties of the Zn2+ complexes toward inorganic anions revealed that the dinuclear Zn2+ complex of L1 selectively binds and senses the triphosphate anion (TP), whereas the mononuclear Zn2+ complex of L2 displays selective recognition of diphosphate (DP). Binding of TP or DP induces emission quenching of the Zn2+ complexes with L1 and L2, respectively. These results are exploited to discuss the role played by pH, number of coordinated metal cations, and binding ability of the bridging units in metal and/or anion coordination and sensing.
机译：报道了一种新的配体（L1）的合成，该配体包含两个通过4,5-二甲基ena啶单元连接的1,4,7-三氮杂环壬烷（[9] aneN（3））部分。对L1和受体L2的Cu2 +，Zn2 +，Cd2 +和Pb2 +的结合和荧光传感特性，它们由两个[6] aneN（3）大环组成，这些大环由6,6''-二甲基-2,2'：6'桥接通过在水性介质中耦合电位计，UV / Vis吸收和发射测量，研究了2''-叔吡啶单元。由于金属结合后荧光发射增强，两种受体都可以选择性检测Zn2 +。 Zn2 +配合物对无机阴离子的结合和传感特性分析表明，L1的双核Zn2 +配合物选择性结合并感测三磷酸根阴离子（TP），而L2的单核Zn2 +配合物显示选择性识别二磷酸（DP）。 TP或DP的结合分别诱导Zn2 +配合物与L1和L2的发射猝灭。利用这些结果来讨论pH，配位金属阳离子的数量以及桥联单元在金属和/或阴离子配位和感测中的结合能力所起的作用。

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