Journal
INORGANIC CHEMISTRY COMMUNICATIONS
Volume 9, Issue 11, Pages 1108-1110Publisher
ELSEVIER
DOI: 10.1016/j.inoche.2006.07.018
Keywords
magnetic ionic liquid; azobenzene; iron(III); photofunctional materials; supramolecular chemistry
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New photo-controllable supramolecular system containing magnetic ionic liquid (iron(III) chloride with 1-butyl-3-methylimidazolium chloride) and azobenzene has been prepared. Reversible structural changes due to cis-trans photoisomerization of azobenzene could be observed by means of resonance Raman and electronic spectroscopy. Field dependence of magnetic moment at 298 K exhibited paramagnetic behavior similar to pure iron(III) magnetic ionic liquid. Alternate irradiation of UV and visible light at 298 K resulted in a monotonous increase of magnetic moment. In analogy with previous study, the novel behavior can be explained as irreversible aggregation of paramagnetic iron(III) complexes forming a short-range order in the supramolecular system. (C) 2006 Elsevier B.V. All rights reserved.
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