三维配合物Mn3(C12H6O4)42-(C11H18N4)2+n的水热合成、晶体结构和磁性研究
Hydrothermal synthesis,crystal structure and magnetic property of a 3D coordinated complex Mn3(C12H6O4)42-·(C11H18N4)2+n
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摘要: 采用水热法合成出一种新型金属有机功能配合物Mn3(C12H6O4)42-(C11H18N4)2+n(C12H6O4为去质子化的1,4-萘二甲酸,(C11H18N4)2+为质子化的1,1'-(1,5-戊烷基)二咪唑).通过X射线单晶衍射技术对该化合物进行结构表征,结果表明该化合物属于单斜晶系C2/c空间群,其晶胞参数分别为a=1.19795(4)nm,b=2.76457(10)nm,c=1.56451(5)nm,α=90°,β=9.37290(10)°,γ=90°,Z=4,V=5.1704(3)nm3,F(000)=2508.锰离子以六配位的方式与6个1,4-萘二甲酸中的氧原子结合形成扭曲的八面体构型.C11H18N4分子以游离形式存在于体系中,一方面质子化后起到平衡电荷的作用;另一方面与1,4-萘二甲酸羰基氧原子形成丰富的氢键作用力.有机配体1,4-萘二甲酸以不同的配位模式连接中心锰原子,最终使配合物形成了一个具有网状结构的三维配位聚合物.磁学性质研究表明:该配合物存在弱的反铁磁性,线性拟合得到配合物的居里外斯温度T=-16.265197K.CCDC:1517397.Abstract: A new manganese coordination polymer,Mn3(C12H6O4)42-·(C11H18N4)2+n (C12H6O4 was deprotonated 1,4-naphthalene dicarboxylic acid;C11H18N4 was protonated 1,1-(1,5-pentanedidyl)bis(imidazole))has been synthesized hydrothermally.X-ray crystal structural dates reveal that the compound crystallizes in monoclinic space groups C2/c.The cell parameters are as follows:a=1.19795(4)nm,b=2.76457(10)nm,c=1.56451(5)nm,α=90°,β=9.37290(10)°,γ=90°,Z=4,V=5.1704(3)nm3,F(000)=2508.Each Mn(Ⅱ) ion is hexa-coordinated by six O atoms from six 1,4-naphthalene dicarboxylic acids,forming octahedral coordination geometry with slight distortion.The C11H18N4 ligand in complex is completely protonated which could not only balance the electric charge of metal ions in the whole framework,but also interlink the carbonyl O atoms of 1,4-naphthalene dicarboxylic acid through hydrogen bonds.The carboxylate oxygen atoms of C12H6O4 are coordinated to Mn(Ⅱ) ions in two different modes,resulting into 3D polycatenation frameworks.The magnetic property of the complex was also investigated and the magnetic susceptibility datas were rationally fitted with T=-16.265197K.showing weakly antiferromagnetic interactions among Mn(Ⅱ) ions in the complex.CCDC:1517397.
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