一个由2-喹啉甲酸和1,10-邻菲啰啉构筑的双核镝化合物：晶体结构和磁学性能

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摘要

本文报道了一个双核镝化合物[Dy2(µ2-OH)2(QLC)4(1,10-phen)2]·4H2O (1) (QLC‒ = 2-喹啉甲酸，1,10-phen = 1,10-邻菲啰啉)的合成，结构和磁学性能研究。化合物1结晶于三斜晶系，P-1空间群，晶胞参数为 a = 10.9439(3) Å, b = 11.2823(3) Å, c = 12.2323(4) Å, α = 107.446(3) °, β = 91.700(3) °, γ = 91.511(2) °, V = 1439.25(8) Å3, Z = 1, C64H50N8O14Dy2 , Mr = 1480.12, Dc = 1.708 g/cm3, μ = 2.653 mm−1, F(000) = 734。根据5816个I >2σ (I)的衍射点精修所得的 R = 0.0366 和 wR = 0.0736。化合物1包含着由一个 1,10-邻菲啰啉和两个2-喹啉甲酸配体螯合一个镝离子形成的单核[Dy(QLC)2(1,10-phen)]次级单元。两个单核的[Dy(QLC)2(1,10-phen)]次级单元被一对羟基基团桥连形成了中心对称的双核[Dy2(µ2-OH)2(QLC)4(1,10-phen)2]结构。镝离子在化合物1 中表现为九配位。详细的磁学性能研究表明化合物1 在零直流场下没有呈现慢的磁驰豫现象，但在2 kOe的直流场下呈现了场诱导的慢磁驰豫现象。

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	栗瑞萍
	王玉玲
	刘庆燕

关键词 ： dinucelar Dy(III) compound, 2-quinolinecarboxylate, slow magnetic relaxation, crystal structure

Abstract：

A dinuclear dysprosium(III) compound, [Dy2(µ2-OH)2(QLC)4(1,10-phen)2]·4H2O (1) (QLC‒ = 2-quinolinecarboxylate and 1,10-phen = 1,10-phenanthroline), was synthesized and structurally and magnetically characterized. Compound 1 crystallizes in triclinic system, space group P with a = 10.9439(3), b = 11.2823(3), c = 12.2323(4) Å, α = 107.446(3), β = 91.700(3), γ = 91.511(2)°, V = 1439.25(8) Å3, Z = 1, C64H50N8O14Dy2, Mr = 1480.12, Dc = 1.708 g/cm3, μ = 2.653 mm−1 and F(000) = 734. The final R = 0.0366 and wR = 0.0736 for 5816 observed reflections with I > 2σ(I). Compound 1 contains the mononuclear [Dy(QLC)2(1,10-phen)] subunit formed from one 1,10-phen and two QLC‒ ligands chelating Dy(III) ion. Two mononuclear [Dy(QLC)2(1,10-phen)] subunits are bridged by a pair of µ2-OH groups to give a centrosymmetric dinuclear [Dy2(µ2-OH)2(QLC)4(1,10-phen)2] with each Dy(III) ion being eight-coordinated. Detailed susceptibility measurements revealed that compound 1 does not show slow magnetic relaxation under zero direct-current field but exhibits field-induced slow magnetic relaxation under 2 kOe applied field.

Key words： dinucelar Dy(III) compound 2-quinolinecarboxylate slow magnetic relaxation crystal structure

收稿日期: 2017-05-31 出版日期: 2018-03-13

基金资助:

Supported by the National Natural Science Foundation of China (No. 21561015)

通讯作者: qyliuchem@jxnu.edu.cn E-mail: qyliuchem@jxnu.edu.cn

引用本文:

栗瑞萍;王玉玲;刘庆燕. 一个由2-喹啉甲酸和1,10-邻菲啰啉构筑的双核镝化合物：晶体结构和磁学性能[J]. 结构化学, 2018, 37(3): 407-413.
LI Rui-Ping;WANG Yu-Ling;LIU Qing-Yan . A Dinuclear Dysprosium-2-quinolinecarboxylate-1,10-Phenanthroline Compound: Crystal Structure and Magnetism. CHINESE JOURNAL OF STRUCTURAL CHEMISTRY, 2018, 37(3): 407-413.

链接本文:

http://manu30.magtech.com.cn/jghx/CN/ 或 http://manu30.magtech.com.cn/jghx/CN/Y2018/V37/I3/407

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