中文摘要：

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[Dy6Co3（EtOH）3（μ3-OH）（μ6-CO3）（μ5-CO3）3（NO3）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μ3-OH--、3个μ5-CO3^2-阴离子以及1个μ6-CO3^2-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.

英文摘要：

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.