Two tetranuclear Cu 2 Ln 2 (Ln = Dy, Tb) heterometallic complexes: Structure, solution behavior, and magnetic properties

Two tetranuclear Cu 2 Ln 2 (Ln = Dy, Tb) heterometallic complexes: Structure, solution behavior, and magnetic properties
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两种四核 Cu 2 Ln 2 (Ln = Dy, Tb) 异金属配合物:结构、溶液行为和磁性

DOI:
10.1002/aoc.6557
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发表时间:
2021-12
期刊:
Appl Organometal Chem.
影响因子:
--
通讯作者:
Zilu Chen
Zilu Chen
中科院分区:
其他
文献类型:
--
作者:
Shui Yu;Qian Zhang;Jingru Zhu;Fengli Wei;Dongcheng Liu;Huancheng Hu;Hua-Hong Zou;Yuning Liang;Fu-Pei Liang;Zilu Chen

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以1-氨基丙醇(HL)为原料,分别与[Cu 2(OAc)4(H2O)2]和Ln(NO3)3·5 H2O反应,合成了两个3d-4f四核金属配合物[Cu 2Ln 2(NO3)4(OAc)2L 4(Ln = Dy 1,Tb 2)].结构分析证实了中心对称的Z形骨架,他们与两个Cu(II)离子占据的外围位置。相邻的两个镧系离子,以及相邻的Ln(III)和Cu(II)离子,都是通过两个O原子双桥连的。详细的动态磁研究表明,两个配合物的缓慢磁弛豫行为的能量势垒为1.35(2)和2.02(4)K分别为1和2。电喷雾质谱(ESI-MS)结果表明,配合物1和2在溶液中容易发生二聚反应。
Two tetranuclear 3d–4f heterometallic complexes [Cu2Ln2(NO3)4(OAc)2L4 (Ln = Dy 1, Tb 2) were obtained under solvothermal reactions of 1-amino-propan-2-ol (HL) with [Cu2(OAc)4(H2O)2 and Ln (NO3)3·5H2O. The structural analyses confirmed a centrosymmetric Z-shaped skeleton for them with the peripheral positions occupied by two Cu (II) ions. The neighboring two lanthanide ions, as well as the neighboring ions of Ln (III) and Cu (II), are all double-bridged through two O atoms. The detailed dynamic magnetic investigation showed slow magnetic relaxation behaviors for both complexes with an energy barrier of 1.35(2) and 2.02(4) K for 1 and 2, respectively. Furthermore, it revealed from the electrospray mass spectrometry (ESI-MS) that complexes 1 and 2 easily undergo dimerization in solution.
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