Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel (Germany) www.ieap.uni-kiel.de/surface/ag-kipp.
Angew Chem Int Ed Engl. 2014 Mar 10;53(11):3019-23. doi: 10.1002/anie.201307968. Epub 2014 Feb 12.
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.
通过在 Au(111) 上沉积的超薄薄膜中铁(II)自旋交叉配合物[Fe(H2bpz)2(phen)]的紫外光电子能谱(UPS)，确定了其电子结构，该配合物在高自旋态和低自旋态下均能进行测定。这也允许对该系统中的热诱导和光诱导自旋转变进行监测。此外，该配合物通过真空紫外光照射被激发到亚稳态的高自旋态。光激发后的弛豫速率随温度的变化而确定。它们表现出从热激活到隧道行为的转变，并且比体材料中的弛豫速率高两个数量级。
