Premium
Heteroleptic Pyridyl‐Carbene Iron Complexes with Tuneable Electronic Properties
Author(s) -
Duchanois Thibaut,
Etienne Thibaud,
Beley Marc,
Assfeld Xavier,
Perpète Eric A.,
Monari Antonio,
Gros Philippe C.
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201402356
Subject(s) - carbene , homoleptic , terpyridine , photochemistry , chemistry , chromophore , substituent , ligand (biochemistry) , pyridine , absorption spectroscopy , cyclic voltammetry , protonation , transition metal , excited state , crystallography , metal , materials science , medicinal chemistry , organic chemistry , electrochemistry , physics , ion , biochemistry , receptor , electrode , quantum mechanics , nuclear physics , catalysis
Abstract New heteroleptic iron complexes mixing a terpyridine bearing a protonable pyridyl substituent (pytpy) and a pyridyl carbene ligand (carb) have been prepared and characterised by UV/Vis spectroscopy, cyclic voltammetry and TD‐DFT computations. The absorption spectrum of [Fe(carb)(pytpy)] 2+ showed a notable redshift compared with the homoleptic [Fe(carb) 2 ] 2+ complex. The MLCT transition occurred at even lower energy when the pendant pyridine was protonated, leading to a wide absorption domain in the 450–650 nm range. Calculations revealed the strong propensity of excited electrons to move from the metal to the pytpy ligand in the complex. This new family of complexes is a promising addition to the arsenal of iron‐based chromophores with tuneable electronic properties.