An Antiferromagnetic Molecular Metal Based on a New Bent-Donor Molecule

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• 作者：Xunwen Xiao ; Toshiki Hayashi ; Hideki Fujiwara ; Toyonari Sugimoto ; Satoru Noguchi ; Yufeng Weng ; Harukazu Yoshino ; Keizo Murata ; Hiroko Aruga Katori
• 刊名：Journal of the American Chemical Society
• 出版年：2007
• 出版时间：October 24, 2007
• 年：2007
• 卷：129
• 期：42
• 页码：12618 - 12619
• 全文大小：84K
• 年卷期：v.129,no.42(October 24, 2007)
• ISSN：1520-5126

文摘

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 () in the conducting ab-plane suggests stronger interactions between the d spins of the FeBr₄^- ions and the conducting 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 -d interactions.