Chloride-bridged, defect-dicubane {Ln4} core clusters: syntheses, crystal structures and magnetic properties.
Chloride-bridged, defect-dicubane {Ln4} core clusters: syntheses, crystal structures and magnetic properties.
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DOI：
10.1039/c4dt01329h
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发表时间：
2014-07
影响因子：
4
通讯作者：
D. Pajerowski;Quan Li;Jason C. Hyun;C. Dennis;D. Phelan;Pengfei Yan;Peng Chen;Guangming Li
中科院分区：
文献类型：
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作者：
D. Pajerowski;Quan Li;Jason C. Hyun;C. Dennis;D. Phelan;Pengfei Yan;Peng Chen;Guangming Li
通过LnCl_3·6 H_2 O与N，N ′-双亚水杨基-1，2-苯二胺（H_2L）的反应，意外地分离出三个氯桥镧系化合物[Ln_4Cl_6（CH_3OH）_（1,2）（OH）_2]·4Cl·2CH_3OH [Ln = Gd（），Dy（），Er（）]。X射线晶体学分析揭示了一个三斜晶胞，具有独特的缺陷-二立方烷{Ln 4}核，并且该系列的结构名义上是同构的。直流磁化率和等温磁化强度的测量提供洞察到相关的集群哈密顿，，和，和交流磁化率显示缓慢松弛，但不是在或下降到2 K和高达1 kHz。
Three chloride-bridged lanthanide compounds, [Ln4Cl6(CH3OH)12(OH)2]·4Cl·2CH3OH [Ln = Gd (), Dy () and Er ()], have been unexpectedly isolated by the reactions of LnCl3·6H2O and N,N'-bis(salicylidene)-1,2-(phenylene-diamine) (H2L). X-ray crystallographic analysis reveals a triclinic cell with a unique defect-dicubane {Ln4} core and the structure across this series is nominally isomorphic. Measurements of direct current magnetic susceptibility and isothermal magnetization give insight into the relevant cluster Hamiltonians for , , and , and alternating current susceptibility shows slow relaxation in , but not in or down to 2 K and up to 1 kHz.