Probing Pb2+ cation via the iridium based phosphorescent dye

被引：48

作者：

Ho, Mei-Lin ^{[1
]}

Cheng, Yi-Ming ^{[1
]}

Wu, Lai-Chin ^{[1
]}

Chou, Pi-Tai ^{[1
]}

Lee, Gene-Hsiang ^{[1
]}

Hsu, Fang-Chi ^{[2
]}

Chi, Yun ^{[2
]}

机构：

[1] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan

[2] Natl Tsing Hua Univ, Dept Chem, Hsinchu 300, Taiwan

来源：

POLYHEDRON | 2007年 / 26卷 / 17期

关键词：

iridium; phosphorescence; pyridyl pyrazolate; Pb2+; cation sensor;

D O I：

10.1016/j.poly.2007.06.029

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We demonstrate the concept of Pb2+ cation sensing using the emissive Ir(III) complex (1) based on the associated decrease of room-temperature phosphorescence upon forming the 1:1 adduct 1-Pb2+. Complex 1 bears two cyclometalated N-phenyl pyrazoles with pyrazoles residing at the mutual trans dispositions as well as one 3,5-di(pyridyl) pyrazolate chelate. X-ray structural analyses on the adduct 1-Pb2+ confirm the key function of 3,5-di(pyridyl) pyrazolate as it forms chelate interaction with the metal analytes, while quenching of phosphorescent emission is probably due to the Pb2+ induced perturbation, which increases the intersystem crossing to another lower-lying triplet state for the host chromophore via an enhanced spin-orbit coupling. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：4886 / 4892

页数：7

共 51 条

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