Higher MLCT lifetime of carbene iron (II) complexes by chelate ring expansion
T Reuter, A Kruse, R Schoch, S Lochbrunner… - Chemical …, 2021 - pubs.rsc.org
Chemical Communications, 2021•pubs.rsc.org
Combining strong σ-donating N-heterocyclic carbene ligands and π-accepting pyridine
ligands with a high octahedricity in rigid iron (II) complexes increases the 3MLCT lifetime
from 0.15 ps in the prototypical [Fe (tpy) 2] 2+ complex to 9.2 ps in [Fe (dpmi) 2] 2+ 12+. The
tripodal CNN ligand dpmi (di (pyridine-2-yl)(3-methylimidazol-2-yl) methane) forms six-
membered chelate rings with the iron (II) centre leading to close to 90° bite angles and
enhanced iron-ligand orbital overlap.
ligands with a high octahedricity in rigid iron (II) complexes increases the 3MLCT lifetime
from 0.15 ps in the prototypical [Fe (tpy) 2] 2+ complex to 9.2 ps in [Fe (dpmi) 2] 2+ 12+. The
tripodal CNN ligand dpmi (di (pyridine-2-yl)(3-methylimidazol-2-yl) methane) forms six-
membered chelate rings with the iron (II) centre leading to close to 90° bite angles and
enhanced iron-ligand orbital overlap.
Combining strong σ-donating N-heterocyclic carbene ligands and π-accepting pyridine ligands with a high octahedricity in rigid iron(II) complexes increases the 3MLCT lifetime from 0.15 ps in the prototypical [Fe(tpy)2]2+ complex to 9.2 ps in [Fe(dpmi)2]2+12+. The tripodal CNN ligand dpmi (di(pyridine-2-yl)(3-methylimidazol-2-yl)methane) forms six-membered chelate rings with the iron(II) centre leading to close to 90° bite angles and enhanced iron-ligand orbital overlap.
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