Neutral 2-phenylbenzimidazole-based iridium( iii ) complexes with picolinate ancillary ligand: tuning the emission properties by manipulating the substituent on the benzimidazole ring - Archive ouverte HAL
Article Dans Une Revue Dalton Transactions Année : 2024

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.
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Dates et versions

hal-04548781 , version 1 (29-07-2024)

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Emiliano Martínez-Vollbert, Christian Philouze, Théo Cavignac, Camille Latouche, Frédérique Loiseau, et al.. Neutral 2-phenylbenzimidazole-based iridium( iii ) complexes with picolinate ancillary ligand: tuning the emission properties by manipulating the substituent on the benzimidazole ring. Dalton Transactions, 2024, 53 (10), pp.4705-4718. ⟨10.1039/D3DT03498D⟩. ⟨hal-04548781⟩
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