Antiferromagnetic or canted antiferromagnetic orderings of Fe(III) d spins of FeX4- ions in BEDT-TTFVO(S).FeX4 (X = Cl, Br) [BEDT-TTFVO(S) = bis(ethylenedithio)tetrathiafulvalenoquinone(-thioquinone)-1,3-dithiolemethide].
Antiferromagnetic or canted antiferromagnetic orderings of Fe(III) d spins of FeX4- ions in BEDT-TTFVO(S).FeX4 (X = Cl, Br) [BEDT-TTFVO(S) = bis(ethylenedithio)tetrathiafulvalenoquinone(-thioquinone)-1,3-dithiolemethide].
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DOI：
10.1021/ic0617700
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发表时间：
2007-03
影响因子：
4.6
通讯作者：
Mingxing Wang;Xunwen Xiao;H. Fujiwara;T. Sugimoto;S. Noguchi;T. Ishida;Takehiko Mori;H. Katori
中科院分区：
文献类型：
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作者：
Mingxing Wang;Xunwen Xiao;H. Fujiwara;T. Sugimoto;S. Noguchi;T. Ishida;Takehiko Mori;H. Katori
在CS_2/CH_3CN中，通过新给体分子双（亚乙基二硫代）四硫富瓦醌（-硫代醌）-1，3-二硫戊烯甲基化物[BEDT-TTFVO（1）和BEDT-TTFVS（2）]与FeX_3（X = Cl，Br）反应，得到1或2与FeX_4 ~-离子的1：1盐（1.FeX_4和2.FeX_4）黑色针状晶体。它们的晶体结构非常相似，其中给体分子强烈二聚，二聚体沿a轴沿着构成一维均匀链，而FeX 4-离子位于相邻给体分子包围的开放空间，也沿沿着a轴构成一维均匀链.给体分子与FeX ~（4-）离子之间存在密切的接触，而四种盐之间的接触距离存在显著差异。所有的盐都是半导体，室温电导率为10-4-10-2 S cm-1。FeX 4-离子的Fe（III）d自旋通过单线态π自旋之一的参与而受到主导铁磁相互作用，以形成短程铁磁d自旋链。这种相邻的链通过单重π自旋相互反铁磁性地相互作用，并分别在1.0，2.4和0.8 K下对1.FeCl 4，1.FeBr 4和2.FeCl 4进行排序。另一方面，反铁磁有序发生与一些倾斜角在1.9 K留下一个小的磁化2.FeBr4。
By the reaction of new donor molecules, bis(ethylenedithio)tetrathiafulvalenoquinone(-thioquinone)-1,3-dithiolemethides [BEDT-TTFVO (1) and BEDT-TTFVS (2)] with FeX3 (X = Cl, Br) in CS2/CH3CN, 1:1 salts of 1 or 2 with an FeX4- ion (1.FeX4 and 2.FeX4) were obtained as black needle crystals. Their crystal structures are very similar to each other, in which the donor molecules are strongly dimerized and the dimers construct a one-dimensional uniform chain along the a axis, while the FeX4- ions are located at an open space surrounded by the neighboring donor molecules and also construct a one-dimensional uniform chain along the a axis. There are close contacts between the donor molecules and the FeX4- ions and significant differences in the contact distances among the four salts. All of the salts are semiconductors with room-temperature electrical conductivities of 10-4-10-2 S cm-1. The Fe(III) d spins of the FeX4- ions are subject to dominant ferromagnetic interaction through the participation of one of the singlet pi spins to form a short-range ferromagnetic d-spin chain. Such neighboring chains interact antiferromagnetically with each other through the singlet pi spins and are ordered at 1.0, 2.4, and 0.8 K for 1.FeCl4, 1.FeBr4, and 2.FeCl4, respectively. On the other hand, the antiferromagnetic ordering occurred with some canted angle at 1.9 K to leave a small magnetization for 2.FeBr4.