Three-dimensional porous metal-organic frameworks exhibiting metamagnetic behaviors: synthesis, structure, adsorption, and magnetic properties.
Three-dimensional porous metal-organic frameworks exhibiting metamagnetic behaviors: synthesis, structure, adsorption, and magnetic properties.
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DOI：
10.1021/ic100188w
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发表时间：
2010-04
影响因子：
4.6
通讯作者：
Qun Yu;Yong-Fei Zeng;Jiongpeng Zhao;Qian Yang;Bo-wen Hu;Ze Chang;X. Bu
中科院分区：
文献类型：
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作者：
Qun Yu;Yong-Fei Zeng;Jiongpeng Zhao;Qian Yang;Bo-wen Hu;Ze Chang;X. Bu
两个类质同象的三维多孔变磁体{[M（6）（N（3））（12）L（6）].（H（2）O）（13）}（无穷大）（M = Ni（II），1; Co（II），2），以2-（1，3，4-噻二唑-2-基硫代）乙酸（HL）为配体，叠氮基为辅助配体，合成了一系列的配合物.单晶X-射线分析表明，配合物具有六边形通道的尺寸为约8.3 A × 8.3 A沿着c轴和空隙空间约25%每单元体积。在740 Torr和77 K下的氢吸附测量显示，在1和2中分别观察到0.68和0.83 wt %的氢吸收，BET表面积为309和328 m2/g。磁性测量表明，它们都表现出强的链内铁磁耦合和弱的链间反铁磁相互作用所导致的全局变磁行为，其中1和2的临界磁场分别为22 kOe和6 kOe.
Two isomorphous 3D porous metamagnets, {[M(6)(N(3))(12)L(6)].(H(2)O)(13)}(infinity) (M = Ni(II), 1; Co(II), 2), have been constructed from 2-(1,3,4-thiadiazol-2-ylthio)acetic acid (HL), with azido as the auxiliary ligand. Single-crystal X-ray analysis indicates that the complexes possess hexagonal channels with dimensions of about 8.3 A x 8.3 A along the c axis and void space of about 25% per cell volume. Hydrogen adsorption measurements at 740 Torr and 77 K reveal that hydrogen uptakes of 0.68 and 0.83 wt % were observed in 1 and 2, respectively, with BET surface areas of 309 and 328 m(2)/g. Magnetic measurement reveals that both of them exhibit global metamagnetic behaviors resulted from strong intrachain ferromagnetic couplings and weak interchain antiferromagnetic interactions, with critical fields of 22 kOe and 6 kOe for 1 and 2, respectively.