Phosphorescent Iridium(III) Complex with an N∧O Ligand as a Hg2+-Selective Chemodosimeter and Logic Gate
Phosphorescent Iridium(III) Complex with an N∧O Ligand as a Hg2+-Selective Chemodosimeter and Logic Gate
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DOI：
10.1021/ic102481x
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发表时间：
2011-07-04
影响因子：
4.6
通讯作者：
Li, Fuyou
中科院分区：
文献类型：
--
作者：
Liu, Yi;Li, Meiyi;Li, Fuyou
磷酰铱（III）配合物作为发光化学传感器的应用越来越受到人们的关注。然而，迄今为止还没有报道铱（III）络合物用作分子逻辑门的实例。合成了两种铱配合物[Ir（ppy）（2）（PBT）]和[Ir（ppy）（2）（PBO）]（PBT，2-（2-羟基苯基）-苯并噻唑; PBO，2-（2-羟基苯基）-苯并恶唑），并通过单晶X射线衍射对其结构进行了表征。理论计算和对这两种配合物的电子物理和电化学性质的详细研究表明，N布尔和O配体主导了它们的发光性质。此外，[Ir（ppy）（2）（PBT）]，在N布尔AND O配体中含有硫原子，可以作为Hg 2+的高选择性化学剂量计，具有比率和肉眼检测，这与N布尔AND O配体PBT从络合物中的解离有关。此外，配合物[Ir（ppy）（2）（PBT）]已被进一步开发为与和抑制逻辑门，Hg 2+和组氨酸作为输入。
Phosphorescent iridium(III) complexes have been attracting increasing attention in applications as luminescent chemosensors. However, no instance of an iridium(III) complex being used as a molecular logic gate has hitherto been reported. In the present study, two iridium(III) complexes, [Ir(ppy)(2)(PBT)] and [Ir(ppy)(2)(PBO)], have been synthesized (PBT, 2-(2-Hydroxyphenyl)-benzothiazole; PBO, 2-(2-hydroxyphenyl)-benzoxazole), and their chemical structures have been characterized by single-crystal X-ray analysis. Theoretical calculations and detailed studies of the photophysical and electrochemical properties of these two complexes have shown that the N boolean AND O ligands dominate their luminescence emission properties. Moreover, [Ir(ppy)(2)(PBT)], containing a sulfur atom in the N boolean AND O ligand, can serve as a highly selective chemodosimeter for Hg2+ with ratiometric and naked-eye detection, which is associated with the dissociation of the N boolean AND O ligand PBT from the complex. Furthermore, complex [Ir(ppy)(2)(PBT)] has been further developed as an AND and INHIBIT logic gate with Hg2+ and histidine as inputs.