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

Toshiyuki Moriuchi, Lisheng Mao, Hsyueh Liang Wu, Satoshi D. Ohmura, Masami Watanabe, Toshikazu Hirao

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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 IrCl 3·nH 2O 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.

Original languageEnglish
Pages (from-to)9519-9525
Number of pages7
JournalDalton Transactions
Issue number31
Publication statusPublished - 2012 Aug 21


ASJC Scopus subject areas

  • Inorganic Chemistry

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