title: A new record excited state (3)MLCT lifetime for metalorganic iron(ii) complexes.
abstract: Herein we report the synthesis and time-resolved spectroscopic characterization of a homoleptic Fe(ii) complex exhibiting a record (3)MLCT lifetime of 26 ps promoted by benzimidazolylidene-based ligands. Time dependent density functional molecular modeling of the triplet excited state manifold clearly reveals that, at equilibrium geometries, the lowest (3)MC state lies higher in energy than the lowest (3)MLCT one. This unprecedented energetic reversal in a series of iron complexes, with the stabilization of the charge-transfer state, opens up new perspectives towards iron-made excitonic and photonic devices, hampering the deactivation of the excitation via metal centered channels.
authors.affiliation: IPCMS & Labex NIE, Université de Strasbourg & CNRS, Rue du Loess, 67034 Strasbourg Cedex, France. stefan.haacke@ipcms.unistra.fr.
authors.forename: Li
authors.initials: L
authors.lastname: Liu
authors.forename: Thibaut
authors.initials: T
authors.lastname: Duchanois
authors.forename: Thibaud
authors.initials: T
authors.lastname: Etienne
authors.forename: Antonio
authors.initials: A
authors.lastname: Monari
authors.forename: Marc
authors.initials: M
authors.lastname: Beley
authors.forename: Xavier
authors.initials: X
authors.lastname: Assfeld
authors.forename: Stefan
authors.initials: S
authors.lastname: Haacke
authors.forename: Philippe C
authors.initials: PC
authors.lastname: Gros