An antiferromagnetic molecular metal based on a new bent-donor molecule.

An antiferromagnetic molecular metal based on a new bent-donor molecule.
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DOI:
10.1021/ja074840q
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发表时间:
2007-09
影响因子:
15
通讯作者:
Xunwen Xiao;T. Hayashi;H. Fujiwara;T. Sugimoto;S. Noguchi;Y. Weng;H. Yoshino;K. Murata;H. Katori
Xunwen Xiao;T. Hayashi;H. Fujiwara;T. Sugimoto;S. Noguchi;Y. Weng;H. Yoshino;K. Murata;H. Katori
中科院分区:
化学1区
文献类型:
--
作者:
Xunwen Xiao;T. Hayashi;H. Fujiwara;T. Sugimoto;S. Noguchi;Y. Weng;H. Yoshino;K. Murata;H. Katori

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在含有NBu_4·FeBr_4的DCE溶液中,通过电化学氧化1得到的(亚乙基二氧四硫富瓦醌-1,3-二硒基甲基化物,1)_2FeBr_4·(1,2-二氯乙烷,DCE)_1/2盐的晶体,在低至0.45K的温度下具有金属导电性。在导电ab平面上的电阻(ρ ε)的负磁阻表明FeBr_4 ~-离子的d自旋与导电π电子之间的相互作用比相应的1,3-二硫戊烯甲基化物给体分子的FeCl_4 ~-盐中的强。d自旋在4.5 K时是反铁磁性的,这是迄今为止在具有显著π−d相互作用的反铁磁性分子金属中获得的最高温度。
The crystal of a (ethylenedioxytetrathiafulvalenoquinone-1,3-diselenolemethide, 1)2·FeBr4·(1,2-dichloroethane, DCE)1/2 salt obtained by electrochemical oxidation of 1 in DCE containing a supporting electrolyte, NBu4·FeBr4, exhibits metallic conductivity down to 0.45 K. The negative magnetoresistance of the electrical resistance (ρ∥) in the conducting ab-plane suggests stronger interactions between the d spins of the FeBr4- ions and the conducting π electrons than those in the FeCl4- salt of the corresponding 1,3-dithiolemethide donor molecule. The d spins order antiferromagnetically at 4.5 K, the highest temperature obtained so far in antiferromagnetic molecular metals with significant π−d interactions.