A Dinuclear Dysprosium-2-quinolinecarboxylate-1, 10-Phenanthroline Compound: Crystal Structure and Magnetism

分类： 化学 >> 物理化学 提交时间： 2017-11-05 合作期刊: 《结构化学》

LI Rui-Ping WANG Yu-Ling LIU Qing-Yan

摘要： 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.

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