Strong π-d interaction based on brominated TTF-type donor EDT-TTFBr2
Strong π-d interaction based on brominated TTF-type donor EDT-TTFBr2
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DOI：
10.1051/jp4:2004114133
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发表时间：
2004-04
期刊：
影响因子：
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通讯作者：
J. Nishijo;A. Miyazaki;T. Enoki;R. Watanabe;Y. Kuwatani;M. Iyoda
中科院分区：
文献类型：
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作者：
J. Nishijo;A. Miyazaki;T. Enoki;R. Watanabe;Y. Kuwatani;M. Iyoda
研究了溴化ttf型给体EDT-TTFBr2（= 4,5-二溴-4,5-乙二硫四噻吩）的新型π-d相互作用体系。磁性（edt - ttfbr2） 2febr4和非磁性（edt - ttfbr2） 2gabr4是同结构盐，它们通过Br-Br原子接触具有强的阴离子给体相互作用，而直接阴离子-阴离子相互作用弱。由于强π-d相互作用，铁盐在T N = 11 K处发生反铁磁跃迁，而π-d相互作用来源于强阴离子给体相互作用。强π-d相互作用在温度和外加磁场变化下的电子输运现象中也起着重要作用。
New π-d interacting system based on brominated TTF-type donor EDT-TTFBr2 (= 4,5-dibromo-4,5-ethylenedithiotetrathiafulvalene) was investigated. Magnetic (EDT-TTFBr 2 ) 2 FeBr 4 and non-magnetic (EDT-TTFBr 2 ) 2 GaBr 4 are isostructural salts, which have strong anion-donor interaction through Br-Br atomic contacts with weak direct anion-anion interaction. The iron salt takes an antiferromagnetic transition at T N = 11 K owing to strong π-d interaction, which originates from the strong anion-donor interaction. The strong π-d interaction also plays an important role in the electron transport phenomenon in the variation of temperature and applied magnetic field.