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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >New ‘aggregation induced emission (AIE)’ active cyclometalated iridium(III) based phosphorescent sensors: high sensitivity for mercury(II) ions
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New ‘aggregation induced emission (AIE)’ active cyclometalated iridium(III) based phosphorescent sensors: high sensitivity for mercury(II) ions

机译：新型的“聚集感应发射（AIE）”有源的基于环金属化铱（III）的磷光传感器：对汞（II）离子的高灵敏度

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摘要

Design and syntheses of ‘aggregation induced emission (AIE)’ active blue-emitting bis- cyclometalated iridium(III) complexes with appended diphosphine ligands [Ir(F_2ppy)_2(L_1/L_2)_2(Cl)] (F_2ppy = 2-(2’,4’-difluoro) phenylpyridine; L_1 = 1,2-bis(diphenylphosphino)ethane; L_2 = bis(diphenylphosphino) propane) have been realized on a suitable route. The free phosphorous donor atom present on the appended diphosphine is shown to provide selective binding to the mercuric ion (Hg~(2+)). The selective binding ability of the probe molecule towards mercuric ions results in a detectable signal due to complete quenching of their AIE properties. The quenching effect of the probe molecule has been explored and found to be the result of the degradation of the probe iridium(III) complex triggered by the presence of mercuric ions due to an interplay of a soft–soft interaction between the free phosphorous atom of the probe molecule and mercuric ions. These complexes were modelled to obtain deeper understanding of excited state properties and the results were tentatively correlated with the experimental data.
机译：设计和合成“聚集诱导发射（AIE）”活性蓝光的双环金属化铱（III）配合物，其具有附加的二膦配体[Ir（F_2ppy）_2（L_1 / L_2）_2（Cl）]（F_2ppy = 2-（ 2'，4'-二氟）苯基吡啶; L_1 = 1,2-双（二苯基膦基）乙烷; L_2 =双（二苯基膦基）丙烷）已经在合适的途径上实现。显示存在于所附二膦上的游离磷供体原子提供与汞离子（Hg〜（2+））的选择性结合。探针分子对汞离子的选择性结合能力由于其AIE特性的完全淬灭而导致可检测的信号。已经探究了探针分子的猝灭作用，并发现其是由于铱离子中磷离子之间的软-软相互作用而导致的汞离子的存在触发了铱（III）配合物降解的结果。探针分子和汞离子。对这些配合物进行建模，以获得对激发态性质的更深入了解，并将结果与​​实验数据初步关联。

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