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Updated: May 13, 2026

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
Published on: October 18, 2019
Phosphorescent Ir(III) complexes with both cyclometalate chromophores and phosphine-silanolate ancillary: concurrent
Fushi Zhang1, Liduo Wang, Shih-Han Chang
1Department of Chemistry, Tsinghua University, Beijing 100084, China. zhangfs@mail.tsinghua.edu.cn
Abstract:
Ir(III) metal complexes with general formula [(C^N)2Ir(P^SiO)], where (C^N)H is 2-phenylisoquinoline (1), 2-phenylpyridine (2) or 2-(2,4-difluorophenyl)pyridine (3), and (P^SiO)H is an organosilanolate ancillary chelate with either diphenylsilyl (a) or dimethylsilyl (b) substituent, were synthesized, among which the structure of 3a was also confirmed using single-crystal X-ray diffraction analyses. These complexes exhibit bright phosphorescence in the region of 489-632 nm in solution at room temperature, showing the first successful example of using organosilanolate as an ancillary chelate. For application, organic light emitting diodes (OLEDs) using phosphors 3a and 3b doped in N,N'-dicarbazolyl-3,5-benzene (mCP) exhibited a maximum brightness of 50,800 cd m(-2) at 800 mA cm(-2) (12 V) with η(ext) of 10.1% and a brightness of 45,900 cd m(-2) at 700 mA cm(-2) (14.5 V) with η(ext) of 10.2%, respectively.
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