Crystal Structure,Thermal Behavior and Magnetic Properties of a New Copper(Ⅱ) Complex Based on Biphenyl-2,5,2',5'-tetracarboxylic Acid |
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作者姓名: | 田丹 周艳红 关丽 朱晓飞 庞宇 张宏 |
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作者单位: | Department;Chemistry;Laboratory;Polyoxometalate;Science;Ministry;Education;Northeast;Normal;University; |
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基金项目: | supported by the NNSFC (No.20771023); the State 863 Program Project (No.2007AA03z218); Analysis and Testing Foundation of Northeast Normal University |
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摘 要: | A new coordination polymer,[Cu2(bptc)(2,2'-bpy) 2(H2O)]·H2O(2,2'-bpy = 2,2'-bipyridine,H4bptc = biphenyl-2,5,2',5'-tetracarboxylic acid) ,has been synthesized under hydrother-mal conditions. The structure was characterized by single-crystal X-ray diffraction,elemental analysis,IR spectra and thermogravimetric analysis. It crystallizes in triclinic,space group P1 with a = 10.6447(12) ,b = 11.0191(12),c = 16.1253(18) ,α = 79.538(2),β = 88.0720(10) ,γ = 61.6650(10) °,V = 1634.1(3) 3,C36H26Cu2N4O10,Mr = 801.69,Z = 2,Dc = 1.629 g/cm3,μ(MoKα) = 1.370 mm-1,F(000) = 816.0,R = 0.0418 and wR = 0.1135 for 4416 observed reflections with I > 2σ(I) . X-ray analysis shows that the title complex exhibits 1D wavelike [Cu2(bptc) ]n chains with two types of diamond-shaped pores. These 1D chains are linked into a 3D supramolecular structure via O-H···O,C-H···O interactions and weak π···π stacking interactions. There exist H-bonded helices in a right-and left-handed sequence by turns in a 2D layer. Moreover,thermal stability has been studied and magnetic measurements show antiferromagnetic interactions for this complex.
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关 键 词: | 晶体结构 联苯 羧酸 反铁磁相互作用 磁特性 热行为 螯合物 铜 |
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