Modular cyclometalated platinum(II) complexes as luminescent molecular sensors for pH and hydrophobic binding regions

被引：1

作者：

Wong, KH ^{[1
]}

Chan, MCW ^{[1
]}

Che, CM ^{[1
]}

机构：

[1] Univ Hong Kong, Dept Chem, Pokfulam Rd, Hong Kong, Peoples R China

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 1999年 / 5卷 / 10期

关键词：

electron transfer; luminescence; micelles; platinum; sensors;

D O I：

10.1002/(SICI)1521-3765(19991001)5:10<2845::AID-CHEM2845>3.0.CO;2-G

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The photophysical properties of the ionisable cyclometalated platinum(II) complex [Pt(CNN)L]ClO4, 1-ClO4 (HCNN = 6-phenyl-2,2'-bipyridine, L=Ph2PCH2NHPh) and its analogue [Pt(CNN)PPh2CH3]ClO4, 2-ClO4 are investigated. The quantum yield of the (MLCT)-M-3 emission (MLCT = metal-to-ligand charge transfer) for 1 (lambda(max) 543 nm in acetonitrile at 298 K) is significantly lower than that for 2 due to photoinduced electron transfer (PET) quenching by the amine component. Complex 1 exhibits different emission intensities over a wide pH range in aqueous and micellar solutions based on the mechanism of PET suppression. The photoluminescence of 1 is employed to estimate the critical micelle concentration.

引用

页码：2845 / 2849

页数：5

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