Exceptional Oxygen Sensing Capabilities and Triplet State Properties of Ir(ppy-NPh2)3

被引：113

作者：

Mak, Chris S. K. ^{[1
]}

Pentlehner, Dominik ^{[2
]}

Stich, Mathias ^{[3
]}

Wolfbeis, Otto S. ^{[3
]}

Chan, Wai Kin ^{[1
]}

Yersin, Hartmut ^{[2
]}

机构：

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

[2] Univ Regensburg, Inst Phys & Theoret Chem, D-93040 Regensburg, Germany

[3] Univ Regensburg, Inst Analyt Chem Chemo & Biosensorik, D-93040 Regensburg, Germany

来源：

CHEMISTRY OF MATERIALS | 2009年 / 21卷 / 11期

关键词：

IRIDIUM(III) COMPLEX; EXPONENTIAL DECAYS; SENSORS; EMISSION; DEVICES; FILMS;

D O I：

10.1021/cm9003678

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A study was conducted to investigate the triplet state properties of Ir(ppy-NPh2)3 in comparison to those of Ir(ppy) 3 and demonstrate their technological potential for oxygen sensing. The emission spectra of Ir(ppy-NPh2)3 and Ir(ppy) 3 were compared. The slightly more structured spectra and longer decay times for Ir(ppy-NPh2)3 indicated a smaller metal-to-ligand charge transfer (MLCT) character of the emitting triplet state of the substituted complex as compared with Ir(ppy)3. It was observed that the photoluminescence quantum efficiency φPL was significantly high finding applications in OLEDs and sensors. A solution of 5 wt % Ir(ppy-NPh 2)3 and 5 wt % ethyl cellulose (EC) in THF was used to prepare the oxygen sensor.

引用

页码：2173 / 2175

页数：3

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