Issue 31, 2012

Synthesis of facial cyclometalated iridium(iii) complexes triggered by tripodal ligands

Abstract

The tripodal ligands composed of the 1,3,5-trisubstituted cyclohexyl moiety as a molecular scaffold and 2-phenylpyridyl moieties as a coordination site were designed. The homoleptic cyclometalated fac-Ir(C^N)3 complexes could be obtained by the reaction of IrCl3·nH2O with the designed tripodal ligands. The single crystal X-ray structure determination confirmed the fac configuration and a distorted octahedral geometry with three intramolecular cyclometalated 2-phenylpyridyl ligands surrounding the iridium metal center. Also, the cyclohexyl scaffold was found to serve as a flexible scaffold to induce the fac configuration. The thus-obtained homoleptic cyclometalated fac-Ir(C^N)3 complexes exhibited a broad emission band in the emission spectra at 298 K.

Graphical abstract: Synthesis of facial cyclometalated iridium(iii) complexes triggered by tripodal ligands

Supplementary files

Article information

Article type
Paper
Submitted
01 Dec 2011
Accepted
30 May 2012
First published
02 Jul 2012

Dalton Trans., 2012,41, 9519-9525

Synthesis of facial cyclometalated iridium(III) complexes triggered by tripodal ligands

T. Moriuchi, L. Mao, H. Wu, S. D. Ohmura, M. Watanabe and T. Hirao, Dalton Trans., 2012, 41, 9519 DOI: 10.1039/C2DT12309F

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