Iron(II) spin-crossover complexes in ultrathin films: electronic structure and spin-state switching by visible and vacuum-UV light.

Authors :: Ludwig E
Naggert H
Kalläne M
Rohlf S
Kröger E
Bannwarth A
Quer A
Rossnagel K
Kipp L
Tuczek F
Source :: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2014 Mar 10; Vol. 53 (11), pp. 3019-23. Date of Electronic Publication: 2014 Feb 12.
Publication Year :: 2014
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.<br /> (© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)

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