Highly sensitive luminescent metal-complex receptors for anions through charge-assisted amide hydrogen bonding.
Highly sensitive luminescent metal-complex receptors for anions through charge-assisted amide hydrogen bonding.
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DOI：
10.1021/ic0206589
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发表时间：
2003-05
影响因子：
4.6
通讯作者：
Shih‐Sheng Sun;A. J. Lees;P. Zavalij
中科院分区：
文献类型：
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作者：
Shih‐Sheng Sun;A. J. Lees;P. Zavalij
两种结构简单、易于合成的发光阴离子受体具有酰胺型阴离子结合位点和三羰基吡啶信号单元，它们对多种阴离子物种表现出突出的灵敏度和选择性。这些络合物在溶液中具有高发射性。在阴离子结合后，发射强度显著淬灭。这些配合物的灵敏度是如此之高，以至于即使在仅存在10（-8）M的氰化物或氟化物阴离子的情况下，发射强度也可以有效地猝灭多达10%。酰胺质子和中心吡啶之间形成分子内氢键的能力被认为是所观察到的高选择性的原因。
Two structurally simple and easily synthesized luminescent anion receptors featured with an amide-type anion binding site and rhenium(I) tricarbonyl pyridine signaling units have been developed, and they display outstanding sensitivity and selectivity toward a variety of anionic species. These complexes are highly emissive in solution. Upon anion binding, the emission intensity was significantly quenched. The sensitivities of these complexes are so high that the emission intensity can be effectively quenched by as much as 10% even in the presence of only 10(-8) M cyanide or fluoride anions. The ability of formation of intramolecular hydrogen bonding between the amide protons and central pyridine is believed to be responsible for the observed high selectivity.