优秀毕业论文（设计）_吡啶酰腙类稀土配合物的合成与结构表征.doc

毕 业 论 文 （ 2016 届） 题 目 吡啶酰腙类稀土Er配合物的合成 与结构表征 学 院 化学化工学院 专 业 化学工程与工艺 年 级 2012级 学生学号 12012242467 学生姓名 徐 乐 指导教师 周惠良 2016年 5 月 10 日 摘 要 本论文采用常规溶液法，以选N3-苯甲酰吡啶基-2-甲酰胺腙作为配体，稀土Er为配位中心离子。在不同的反应条件下，合成了两种不同构型的稀土-有机金属配合物X-射线单晶衍射确定稀土配合物晶体结构。 结构分析表明，配合物[Er(bpad)2(H2O)2]+[NO3]- （1）属于单斜晶系，空间群为P-21/n。晶胞参数为a = 8.8517nm、b = 90nm、c = 14.2889nm、α = 90、β = 105.1070、γ = 90Er(Ⅲ)离子，两个bpad-配体和两个H2O分子配位，同时还存在一个游离的NO3-，中心金属Er(Ⅲ)离子形成八配位的畸变十二面体构型。配合物[Er(bpad)3]·CH3OH（2）C-2/c。晶胞参数分别为a = 11.5868nm、b = 90nm、c = 112.979nm、α = 90、β = 112.979、γ = 90Er(III)离子与三个bpad-配体分子参与配位，同时存在一个游离的CH3OH分子，中心金属Er(III)离子形成九配位的三帽三棱柱构型。 关键词：Abstract In this paper, we choose rare earth metal Er as the paramagnetic center, N3-benzoyl pyridine-2-carboxylic acid amide hydrazone as a ligand. Under the different reactive conditions, two new rare earth metal-organic compounds have been obtained by general solution method. The complexes are mainly characterized by elemental analysis, IR spectrum, the structures of compounds were determined by the X-ray crystal diffraction. The Structural analysis showed that the crystal structure of [Er(bpad)2(H2O)2]+[NO3]- (complex 1) belongs to monoclinic crystal system P21/n space group, with a = 8.8517nm, b = 90nm, c = 14.2889nm, α = 90, β = 105.1070, γ = 90. The Er(Ⅲ) ion is coordinated with tow bpad- anions and two H2O moleculars as well as a free NO3-, the polyhedron around the Er(Ⅲ) ion is a eight-coordinated distorted dodecahedron. The crystal structure of [Er(bpad)3]·CH3OH (complex 2) belongs to C2/c space group monoclinic, with a = 11.5868nm, b = 90nm, c = 112.979nm, α = 90, β = 112.979, γ = 90. The Er(III) ion is coordinated with three bpad- anions and a free CH3OH moleculars, the polyhedron around the Er(Ⅲ) ion is a nine-coordinated tricapped tri-prism. Key words：Acylhydrazone；lanthan