Magnetic Exchange Coupling and Potent Antiviral Activity of [(VO)3(SbW9O33)2]12−
Magnetic Exchange Coupling and Potent Antiviral Activity of [(VO)3(SbW9O33)2]12−
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[(VO)3(SbW9O33)2]12− 的磁交换耦合和有效抗病毒活性
DOI：
10.1007/0-306-47933-8_14
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
S. Shigeta
中科院分区：
文献类型：
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作者：
T. Yamase;B. Botar;E. Ishikawa;K. Fukaya;S. Shigeta
与 的反应类似于 与 的反应，晶体结构测定表明， 的结构由两个阴离子组成，两个阴离子通过外部作为非共享配体的三个赤道 Mn 原子以方锥体配位连接，四个氧原子属于 。三个赤道 Mn/Cu 原子在 5.255-5.297 Å/4.669-4.707 Å 之间间隔良好。我们在这里报道了同构三（氧钒）取代的钨锑酸盐（III）和铋酸盐（III）的合成和结构表征，其间距为5.3-5.5 Å，揭示了通过桥连接的中心之间的弱自旋交换相互作用，并为理解磁性有趣的高核多氧钒酸盐中心之间的分子内自旋-自旋相互作用提供了简单的模型。 3'4 到目前为止，多氧钒酸盐中存在弱分子内偶合的氧钒簇片段（A= 和），距离为 4.5-5.7 Å。 3 尽管提出了在 20 K< T< 100 K 下存在由两个反铁磁六边形层夹着的磁隔离三角形（距离为 5.290 (5)-5.603 (4) Å）层的情况，但没有证据表明氧钒三角形中存在分子内自旋交换相互作用。 5 我们还描述了三（氧钒）钨锑酸 (III) 阴离子对感染高危个体（例如早产儿、心血管衰竭、肺发育不良和免疫缺陷的婴儿）的多种包膜病毒具有有效的抗病毒活性。这一发现表明
Reaction of with gives similar to the reaction of with to yield A crystal structure determination of shows that the structure of consists of two anions linked via three equatorial Mn atoms with square-pyramidal coordination by exterior as unshared ligands and four oxygen atoms belonging to On the other hand, the structure of the related complex shows that one Cu atom is in square-planar coordination through four oxo groups and two Cu atoms are in exterior sites (of exterior) with square-pyramidal coordination. The three equatorial Mn/Cu atoms are well-separated in 5.255-5.297 Å/4.669-4.707 Å. We report here the synthesis and structural characterization of isostructural tris (vanadyl)-substituted tungsto-antimonate (III) and-bismutate (III) with large separation of 5.3-5.5 Å, which reveal the weak spin-exchange interaction between centers linked by bridges and provide simple models for understanding intramolecular spin-spin interactions between centers of the magnetically intriguing high-nuclearity-polyoxovanadates. 3'4 So far, the presence of the weak intramolecular coupling of vanadyl cluster fragment in the polyoxovanadates has been revealed for bridges (A= and) with distances of 4.5-5.7 Å. 3 Although in the presence of the magnetically isolated-triangle (with distances of 5.290 (5)-5.603 (4) Å) layer sandwiched by two antiferromagnetic hexagonal layers at 20 K< T< 100 K has been proposed, there was no evidence of the intramolecular spin-exchange interaction in the vanadyl triangle. 5 We also describe potent antiviral activities of the tris (vanadyl) tungstoantimonate (III) anions against a wide variety of the enveloped viruses which infect high-risk individuals, such as infants born with prematurity, cardiovascular failure, pulmonary dysplasia, and immunodeficiency. This finding indicates