吡啶基三唑钴(Ⅲ ) 配合物的合成、 晶体结构、 热稳定性及其热催化性能研究
A Cobalt(Ⅲ) Coordination Compound with Pyridyl-Triazole Ligand:Synthesis,Crystal Structure,Thermostability and Thermocatalytic Performance
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摘要: 以 3 - ( 2 - 吡啶基) - 5 - ( 4 - 吡啶基) - 1 - H - 1 , 2 , 4 - 三唑( 2 , 4 ' - H b p t )和均苯三酸 ( H 3 b t c )为共配体, 在水热条件下合成了一例金属钴(I I I ) 配合物: C o ( 2 , 4 ' - b p t ) 3 ∙H 3 b t c ( A ) , 通过单晶 X 射线衍射、 元素分析、 红外光谱和热重分析对其组成、 结构和热稳定性进行了表征 . 结果表明, 化合物 A 属于正交晶系, P b c a 空间群, 三个2 , 4 ' - H b p t 配体失去质子后以耦合配位模式与钴( I I I ) 离子结合形成单核结构单元, 游离的均苯三酸以 π … π 堆积和氢键作用将单核单元连接起来, 形成了化合物的三维超分子结构 . D S C 量热分析表明, 配合物 A 作为添加剂对高氯酸铵( A P ) 的热分解行为显示出良好的催化作用 .Abstract: Based on the 3-(2-pyridyl)-5-(3-pyridyl)-1-H-1,2,4-triazole (2,4′-Hbpt) and trimesic acid (H3btc) ligands, a new coordination compound, \Co(2,4′-bpt)3\簚H3btc (A), has been constructed under hydrothermal condition. The structure of title compound was characterized by single crystal X-ray diffraction analysis, elemental analyses, infrared spectrum and thermogravimetric analysis. Compound A crystallizes was in the triclinic system and space group P-1. Three deprotonated 2,4'-bpt ligands chelated one cobalt (III) ion to form the mononuclear metal unit which connected to the free H3btc molecule through π…π stacking and hydrogen bonding to yield the 3D supramolecular network of compound A. Moreover, the compound was explored as additives to promote the thermal decomposition of ammonium perchlorate (AP) by the differential scanning calorimetry techniques (DSC), suggesting superior thermocatalytic performance.
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