在线阅读 --自然科学版 2020年3期《2,4,6-三甲基苯甲酸和5,5'-二甲基-2,2'-联吡啶稀土镧配合物的构筑、晶体结构和热分解反应动力学》
2,4,6-三甲基苯甲酸和5,5'-二甲基-2,2'-联吡啶稀土镧配合物的构筑、晶体结构和热分解反应动力学--[在线阅读]
任宁1, 周孟雪2, 张建军2
1. 邯郸学院 化学化工与材料学院, 河北省杂环化合物重点实验室, 河北 邯郸 056005;
2. 河北师范大学 分析测试中心, 化学与材料科学学院, 河北 石家庄 050024
起止页码: 226--233页
DOI: 10.13763/j.cnki.jhebnu.nse.2020.03.007
摘要
以2,4,6-三甲基苯甲酸和5,5'-二甲基-2,2'-联吡啶为配体,采用溶剂热合成法,制备出双核分子结构配合物2(L=2,4,6-三甲基苯甲酸根,L'=5,5'-二甲基-2,2'-联吡啶).晶体结构表明该配合物属于三斜晶系,P ī空间群,配合物分子通过配体分子之间微弱的π π堆积作用分别形成一维链状和二维面状结构.TG DTG/DSC研究结果表明该配合物具有一定的热稳定性,讨论了配合物的热稳定性和结构之间的构效关系.采用非线性等转化率积分法(NL-INT)和Starink法得到配合物第1步热分解过程的活化能与转化率的变化关系,计算了该步热分解反应的表观活化能.

Synthesis Crystal Structure and Thermal Decomposition Kinetics of Lanthanum Complex with 2,4,6-trimethylbenzoic Acid and 5,5'-dimethyl-2,2'-bipyridine
REN Ning1, ZHOU Mengxue2, ZHANG Jianjun2
1. College of Chemical Engineering&Material, Hebei Key Laboratory of Heterocyclic Compounds, Handan University, Hebei Handan 056005, China;
2. Testing and Analysis Center, College of Chemistry&Material Science, Hebei Normal University, Hebei Shijiazhuang 050024, China
Abstract:
A binuclear structure 2 (L=2,4,6-trimethylbenzoate,L'=5,5'-dimethyl-2,2'-bipyridine) was synthesized by using 2,4,6-trimethylbenzoic acid and 5,5'-dimethyl-2,2'-bipyridine as ligands,through sohent thermal methods.Crystal structure showed that the complex belongs to triclinic system and P ī space group.The prepared complex consists of one-dimensional chain and two-dimensional planar structure.Through the weak π-π stacking among ligand molecules,respectively.TG-DTG/DSC results showed that the complex has a fairwell degree of thermal stability.The structure-activity relationship is discussed.The nonlinear equal conversion integration method(Nl-INT) and Starink method were used to find out the relationship between activation energy of the first thermal decomposition process and conversion rate,and the average activation energy of the first thermal decomposition reaction was obtained.

收稿日期: 2020-02-24
基金项目: 国家自然科学基金(21803016)

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