title: Iron(II) spin-crossover complexes in ultrathin films: electronic structure and spin-state switching by visible and vacuum-UV light.
abstract: The electronic structure of the iron(II) spin crossover complex [Fe(H2bpz)2(phen)] deposited as an ultrathin film on Au(111) is determined by means of UV-photoelectron spectroscopy (UPS) in the high-spin and in the low-spin state. This also allows monitoring the thermal as well as photoinduced spin transition in this system. Moreover, the complex is excited to the metastable high-spin state by irradiation with vacuum-UV light. Relaxation rates after photoexcitation are determined as a function of temperature. They exhibit a transition from thermally activated to tunneling behavior and are two orders of magnitude higher than in the bulk material.
authors: Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel (Germany) www.ieap.uni-kiel.de/surface/ag-kipp.
authors: E
authors: E
authors: Ludwig
authors: H
authors: H
authors: Naggert
authors: M
authors: M
authors: Kalläne
authors: S
authors: S
authors: Rohlf
authors: E
authors: E
authors: Kröger
authors: A
authors: A
authors: Bannwarth
authors: A
authors: A
authors: Quer
authors: K
authors: K
authors: Rossnagel
authors: L
authors: L
authors: Kipp
authors: F
authors: F
authors: Tuczek
keywords: molecular switches; spin crossover; thin films; ultraviolet photoelectron spectroscopy