Neutral 2-phenylbenzimidazole-based iridium( iii ) complexes with picolinate ancillary ligand: tuning the emission properties by manipulating the substituent on the benzimidazole ring
Résumé
We report the synthesis and characterization of ten neutral bisheteroleptic iridium(III) complexes with 2-phenylbenzimidazole cyclometallating ligand and picolinate as ancillary ligand. The 2-phenylbenzimidazole has been modified by selected substituents introduced on the cyclometallating ring and/or on the benzimidazole moiety. The integrity of the complexes has been assessed by NMR spectroscopy, by high-resolution mass spectrometry and by elemental analysis. The complexes are demonstrated to be highly phosphorescent at room temperature and a luminescence study with comprehensive ab initio calculations allow us to determine the lowest emitting excited state which depends on the substituent nature and its position on the cyclometallating ligand.
Domaines
Chimie de coordination
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Neutral 2-phenylbenzimidazole complexes Dalton-Revised-.pdf (1.31 Mo)
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