以金属钴盐、2-羟基-1,3,5-苯基三羧酸(OH-H3BTC)为原料,在碱性条件下,通过水热方法合成了一个钴配位聚合物[Co2(O-BTC)(H2O)5]n(1),并利用X射线粉末和单晶衍射、红外光谱、元素分析以及热重等方法对该化合物进行了表征.化合物1含有线性四核单元[Co4O7],四核单元内的金属离子是通过羧酸氧原子和羟基氧原子桥联的.该四核单元进一步通过O-BTC4-配体在ab平面上形成一个二维层状结构,相邻的层与层通过氢键作用形成一个三维超分子结构.热重分析结果显示化合物1在100℃开始失重.磁性研究表明,化合物1中相邻的钴离子之间存在反铁磁性相互作用.%The hydrothermal reaction of cobalt(Ⅱ) salts with 2-hydroxyl-1,3,5-benzenetricarboxylic acid (OHH3BTC) in the presence of sodium hydroxide afforded a cobalt(Ⅱ) coordination polymer,namely [Co2(O-BTC)(H2O)5]n (1),which has been characterized by powder and single-crystal X-ray diffraction,infrared spectroscopy,elemental analysis,and thermogravimetric analysis.Compound 1 contains a linear tetranuclear unit [Co4O7] through the carboxylate oxygen and hydroxyl atoms,which are further linked to form a two-dimensional (2D) layered structure in the ab plane by the O-BTC4-organic ligands.Adjacent layers are packed along the c-axis with the hydrogen bond interactions dominating between the layers to form a three-dimensional (3D) supramolecular structure.Thermal analysis reveals that 1 begins to lose weight at ca.100 ℃.Magnetic studies reveal that dominant antiferromagnetic interactions are dominated between the magnetic centers in 1.
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