Tailoring the Photophysical Properties of a Homoleptic Iron(II) Tetra N-Heterocyclic Carbene Complex by Attaching an Imidazolium Group to the (C^∧N^∧C) Pincer Ligand─A Comparative Study.

ABSTRACT: We here report the synthesis of the homoleptic iron(II) N-heterocyclic carbene (NHC) complex [Fe(miHpbmi)₂](PF₆)₄ (miHpbmi = 4-((3-methyl-1H-imidazolium-1-yl)pyridine-2,6-diyl)bis(3-methylimidazol-2-ylidene)) and its electrochemical and photophysical properties. The introduction of the π-electron-withdrawing 3-methyl-1H-imidazol-3-ium-1-yl group into the NHC ligand framework resulted in stabilization of the metal-to-ligand charge transfer (MLCT) state and destabilization of the metal-centered (MC) states. This resulted in an improved excited-state lifetime of 16 ps compared to the 9 ps for the unsubstituted parent compound [Fe(pbmi)₂](PF₆)₂ (pbmi = (pyridine-2,6-diyl)bis(3-methylimidazol-2-ylidene)) as w

SUBMITTER: Prakash O 

PROVIDER: S-EPMC10865346 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature