Authentic-Blue Phosphorescent Iridium(III) Complexes Bearing Both Hydride and Benzyl Diphenylphosphine; Control of the Emission Efficiency by Ligand Coordination Geometry

被引：52

作者：

Chiu, Yuan-Chieh ^{[1
]}

Lin, Chen-Huey ^{[1
]}

Hung, Jui-Yi ^{[1
]}

Chi, Yun ^{[1
]}

Cheng, Yi-Ming ^{[2
]}

Wang, Kang-Wei ^{[2
]}

Chung, Min-Wen ^{[2
]}

Lee, Gene-Hsiang ^{[2
]}

Chou, Pi-Tai ^{[2
]}

机构：

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

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

来源：

INORGANIC CHEMISTRY | 2009年 / 48卷 / 17期

关键词：

DENSITY-FUNCTIONAL THEORY; CYCLOMETALATED IR(III) COMPLEXES; EFFECTIVE CORE POTENTIALS; LIGHT-EMITTING-DIODES; ANCILLARY LIGANDS; ROOM-TEMPERATURE; ELECTROLUMINESCENT DEVICES; MOLECULAR CALCULATIONS; EXCITATION-ENERGIES; HOST MATERIALS;

D O I：

10.1021/ic900607s

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Sequential treatment of IrCl(3 center dot)nH(2)O with 2 equiv of benzyl diphenylphosphine (bdpH) and then 1 equiv of 3-trifluoromethyl-5-(2-pyridyl) pyrazole (fppzH) in 2-methoxyethanol gave formation to three isomeric complexes with formula [Ir(bdp)(fppz)(bdpH)H] (1-3). Their molecular structures were established by single crystal X-ray diffraction studies, showing existence of one monodentate phosphine bdpH, one terminal hydride, a cyclometalated bdp chelate, and a fppz chelate. Variation of the metal-ligand bond distances showed good agreement with those predicted by the trans effect. Raman spectroscopic analyses and the corresponding photophysical data are also recorded and compared. Among all isomers complex 1 showed the worst emission efficiency, while complexes 2 and 3 exhibited the greatest luminescent efficiency in solid state and in degassed CH2Cl2 solution at room temperature, respectively. This structural relationship could be due to the simultaneously weakened hydride and the monodentate bdpH bonding that are destabilized by the trans-pyrazolate anion and cyclometalated benzyl group, respectively.

引用

页码：8164 / 8172

页数：9

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