期刊
INORGANICA CHIMICA ACTA
卷 361, 期 12-13, 页码 3570-3576出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2008.03.079
关键词
photochromism; magnetism; spirooxazine; photochromic metal complex; colorability
We have synthesized a series of M(IPSO)(3)(BPh(4))(2) complexes consisting of first row transition metals and a photochromic phenanthroline ligand: (M = Mn(II), Fe(II), Co(II), Ni(II), Zn(II), and Cu(II), IPSO = spiro[indole-phenanthrolinoxazine]). The optical properties associated with photochromic behavior were evaluated by determination of the(i) equilibrium constants (K) for the thermal and photostationary states, (ii) rates of photochemical ring-opening and ring-closure, and (iii) rates of thermal ring-closure. The photocolorability values associated with conversion from the colorless spirooxazine to the colored photomerocyanine isomer are greatly enhanced upon metal coordination. Variable temperature magnetic susceptibility experiments suggest deviations from cubic symmetry associated with desymmetrization induced by a dependence of ligand field strength on the photochromic state of IPSO. Crown Copyright (c) 2008 Published by Elsevier B.V. All rights reserved.
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