title: High intrinsic barriers against spin-state relaxation in iron(II)-complex solutions.
abstract: Slow relaxation: Exergonic high-spin→low-spin relaxation after photoexcitation has been found to be exceedingly slow in a class of iron(II) complexes with hexadentate imine ligands. The thermal activation barriers that arise between the quintet- and singlet-spin manifolds are the highest ever recorded for spin crossover of isolated molecules in free solution (see figure).
authors.affiliation: Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany.
authors.forename: Philipp
authors.initials: P
authors.lastname: Stock
authors.forename: Tomasz
authors.initials: T
authors.lastname: Pędziński
authors.forename: Nicole
authors.initials: N
authors.lastname: Spintig
authors.forename: Andreas
authors.initials: A
authors.lastname: Grohmann
authors.forename: Gerald
authors.initials: G
authors.lastname: Hörner
mesh_terms: D005296:Ferrous Compounds / Q000737:chemistry*; D015394:Molecular Structure; D055668:Photochemical Processes; D011789:Quantum Theory; D012996:Solutions; D013696:Temperature
chemical_list: D005296:Ferrous Compounds; D012996:Solutions