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Reversible photomagnetism in a cobalt layered compound coupled with photochromic diarylethene

机译：钴层状化合物与光致变色二芳基乙烯偶联的可逆光磁

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Photomagnetism is one of the most attractive topics in recent research oil Molecular solids. In order to produce a photocontrollable magnet. we have synthesized a novel organic-inorganic hybrid system Coupled with a photochromic diarylethene anion, 2.2'-dimethyl-3.3-(perfluorocyclopentene-1,2-diyl)bis(benzo[b]thiophene-6-sulfonate) (1a) and cobalt LDHs (layered double hydroxides). Based oil the elemental analysis, the title compound, which was synthesized by the anion exchange reaction between Co-2(OH)(3)(CH3COO)center dot H2O (2) and 1a, has the chemical composition, Co-4(OH)(7)(1a)(0.5)center dot 3H(2)O (3). Powder X-ray diffraction analysis revealed the interlayer distance of c=27.8 A. The magnetic Susceptibility measurements elucidated the ferromagnetic intra- and inter-layer interactions and the Curie temperature of T-c = 9 K. By UV irradiation of 313 nm, 3 shows the photo-isomerization of diarylethene anion from the open form to the closed one in solid state, which leads to the decreases in the coercive field and the remnant magnetization. Furthermore, the photo-excited state is returned to the initial state (open form) almost reversibly by visible irradiation of 550 nm. (c) 2005 Elsevier Ltd. All rights reserved.
机译：光磁学是最近研究的油分子固体中最吸引人的主题之一。为了生产光控磁体。我们合成了新颖的有机-无机杂化体系，并与光致变色二芳基乙烯阴离子，2.2'-二甲基-3.3-（全氟环戊烯-1,2-二基）双（苯并[b]噻吩-6-磺酸盐）（1a）和钴耦合LDHs（层状双氢氧化物）。基于元素分析的油，通过Co-2（OH）（3）（CH3COO）中心点H2O（2）和1a之间的阴离子交换反应合成的标题化合物的化学组成为Co-4（OH） ）（7）（1a）（0.5）中心点3H（2）O（3）。粉末X射线衍射分析表明，层间距离为c = 27.8A。磁化率测量结果阐明了铁磁层间和层间的相互作用以及居里温度Tc = 9K。通过313 nm的紫外线照射，图3显示了固态的二芳基乙烯阴离子从开放形式向封闭形式的光异构化，导致矫顽场的减小和剩余磁化强度。此外，通过550nm的可见光照射，光激发态几乎可逆地返回到初始状态（开放形式）。 （c）2005 Elsevier Ltd.保留所有权利。

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