State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.
Dalton Trans. 2011 Sep 7;40(33):8347-52. doi: 10.1039/c1dt10654f. Epub 2011 Jul 25.
The syntheses, crystal structures and magnetic studies are reported for a series of Ln(4) clusters formulated as Ln(4)(μ(3)-OH)(2)(php)(2)(OAc)(6)(H(2)O)(2)]·4MeOH·nH(2)O (Ln = Gd (1), Tb (2), Dy (3) (n = 2) and Ho (4) (n = 0); H(2)php = 2,6-(picolinoylhydrazone)pyridine). The overall metal core of each cluster is comprised of two edge-sharing triangular Ln(3) units linked by μ(3)-OH bridges. Direct-current (dc) magnetic susceptibility studies reveal that the Ln(III) ions are very weakly coupled in all four compounds. Alternating-current (ac) magnetic susceptibility studies for 3 indicate that field-induced slow relaxation phenomenon occurs for this compound.
本文报道了一系列 Ln(4) 簇合物的合成、晶体结构和磁性研究，其化学式为 Ln(4)(μ(3)-OH)(2)(php)(2)(OAc)(6)(H(2)O)(2)]·4MeOH·nH(2)O（Ln = Gd（1），Tb（2），Dy（3）（n = 2）和 Ho（4）（n = 0）；H(2)php = 2,6-(picolinoylhydrazone)pyridine）。每个簇合物的整体金属核心由两个通过 μ(3)-OH 桥连接的边缘共享三角形 Ln(3)单元组成。直流（dc）磁化率研究表明，四个化合物中 Ln(III)离子的耦合非常弱。对 3 的交流（ac）磁化率研究表明，该化合物存在磁场诱导的缓慢弛豫现象。
