8-羟基喹啉与2,2′-二甲基丙酸共配位的异金属配合物的合成、结构及磁性能  

Synthesis,structure and magnetism of a new 8-hydroxyquinoline and 2,2′-dimethylpropanoate-based heterometallix complex

作　　者：李瑞 李言[1,2,3] 杨恩翠[1,2,3] 赵小军[1,2,3] 

机构地区：[1]天津师范大学化学学院,天津300387 [2]天津师范大学无机-有机杂化功能材料化学教育部重点实验室,天津300387 [3]天津师范大学天津市功能分子结构与性能重点实验室,天津300387

出　　处：《天津师范大学学报（自然科学版）》2017年第4期35-39,共5页Journal of Tianjin Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(21371134;21531005)

摘　　要：采用溶剂热方法制备了1个新颖的8-羟基喹啉(Heq)与2,2′-二甲基丙酸(piv H)共配位的异金属配合物[Dy_6Co_3(EtOH)_3(μ_3-OH)(μ_6-CO_3)(μ_5-CO_3)_3(NO_3)_3(piv)_6(eq)_6],并通过单晶和粉末X-线衍射、元素分析、红外光谱、热失重以及变温磁化率测定等技术对配合物的结构、热稳定性和磁性能进行表征.该配合物结晶于三方晶系R3空间点群,a=1.662 33(4)nm,b=1.662 33(4)nm,c=7.606 40(4)nm,V=18.203 1(12)nm^3,Z=18.配合物中6个Dy~Ⅲ离子和3个Co~Ⅱ离子通过1个μ_3-OH^-、3个μ_5-CO_3^(2-)阴离子以及1个μ_6-CO_3^(2-)阴离子桥联形成1个封闭笼子状的九核金属簇,九核中心的外围被6个piv-配体和6个eq-配体包围,形成1个球形的分子结构.分子内相邻的Dy~Ⅲ和Co~Ⅱ离子之间呈现弱的反铁磁相互作用,当外加场为零时该配合物交流磁化率的虚部低温区出现频率依赖,表明配合物具有慢磁弛豫行为.A novel 8-hydroxyquinoline（ Heq） and 2,2 -dimethylpropanoate（ pivH）-based complex, [Dy6Co3 （ EtOH）3 （3-OH） （6-CO3 ） （5-CO3 ）3 （ NO3 ）3 （ piv）6 （ eq）6] was solvothermally synthesized. The structure, thermal stability and magnetismof the complex were characterized by single -crystal and powder X-ray diffraction, elemental analysis, FT-IR spectrum,TG and variable-temperature magnetic susceptibility. The complex crystallizes in the trigonal space group with =1.66 233 （ 4）nm, = 1.662 33 （ 4）nm, = 7.606 4 （ 4）nm, =18.203 1（ 12）nm3and = 18. In the complex, six Dy andthree Co ions were connected into a closed cage-shaped cluster by 3-OH-, 6-CO32-and 5-CO32-bridges, which is furthersurrounded by six piv-and six eq-ligands. Weak antiferromagnetic coupling was observed between the adjacent Dy and Coions, and frequency-dependent tendency in out-of-phase without applied dc field was observed, indicating the slow magneticrelaxation behavior of the complex.

关 键 词：混合配体 8-羟基喹啉 晶体结构 磁性 

分 类 号：O614[理学—无机化学]