Two Mn6 single-molecule magnets with sulfur-contained capping ligand
Two Mn6 single-molecule magnets with sulfur-contained capping ligand
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DOI：
10.1016/j.poly.2011.05.046
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发表时间：
2011-11
期刊：
影响因子：
2.6
通讯作者：
C. Zhou;Zheming Wang;Bingwu Wang;Song Gao
中科院分区：
文献类型：
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作者：
C. Zhou;Zheming Wang;Bingwu Wang;Song Gao
研究了Mn（ClO_4）_2·6H_2O与1-（2-羟基苯基）乙酮肟（简称H_2O）的反应。作为MeSao）、NEt 3和噻吩-2-羧酸/噻吩-3-羧酸（2-TCA/3-TCA）分别产生[Mn 6 O2（MeSao）6（2-TCA）2（EtOH）4（H2O）2]（EtOH）2（1）和[Mn 6 O2（MeSao）6（3-TCA）2（EtOH）4（H2O）2]（EtOH）2（2）。它们的结构可以被描述为[MnIII 6 O2（Mesao）6（O2 C-thiophene）2（EtOH）4]的核心，由两个偏移的堆叠的[MnIII 3（μ3-O2-）]7+三角形亚基组成，由两个中心肟基O原子和两个来自酚氧基的O原子连接。磁性研究表明，1和2的自旋基态S=4，两个配合物均表现出单分子磁性，其能垒Ueff均在45 K左右.
The reactions of Mn(ClO4)2·6H2O, 1-(2-hydroxyphenyl)ethanone oxime (abbr. as MeSao), NEt3and thiophene-2-carboxylic acid/thiophene-3-carboxylic acid (2-TCA/3-TCA) lead to [Mn6O2(MeSao)6(2-TCA)2(EtOH)4(H2O)2](EtOH)2(1) and [Mn6O2(MeSao)6(3-TCA)2(EtOH)4(H2O)2](EtOH)2(2), respectively. Their structures can be described as a core of the [MnIII6O2(Mesao)6(O2C-thiophene)2(EtOH)4] consisting two off-set, stacked [MnIII3(μ3-O2−)]7+triangular subunits linked by two central oximato O-atoms and two O-atoms from phenoxide group. Magnetic investigation revealed that 1 and 2 all have a spin ground state S=4, and both complexes show single-molecule magnet behaviors with similar energy barriers Ueff∼45K.