發(fā)布時間：2018-06-28 02:54

  本文選題：鎂配合物 + 開環(huán)聚合�。� 參考：《山西大學》2017年碩士論文

【摘要】：近年來,白色污染等環(huán)境問題日益困擾著人們的生活,為了解決這一問題,具有可降解性的、生物相容性的以及無毒的這種新型的聚酯高分子材料成為科研工作者關注研究的熱點,這些高分子材料取代傳統(tǒng)的不可降解材料而具有很大的經濟效益以及社會效益。隨之產生的運用金屬配合物作為催化劑進行開環(huán)聚酯的研究也取得了較高的成就,能夠較好的控制聚合物的分子量,分子量分布也較窄。鎂是人體必須的元素,無毒性。同時鎂金屬配合物催化活性好,對于己內酯或是丙交酯的開環(huán)聚合具有較好的可控性,所以我們嘗試合成含有N,O配位點這種結構的對有機體無害金屬配合物進行開環(huán)聚合,并通過改變配體的取代基實現(xiàn)結構不同來合成具有不同催化性能的催化劑。本課題組長期主要研究的是以各種吡啶為母體的N,O和N,N雙齒金屬絡合物的合成以及這些金屬絡合物對環(huán)酯的開環(huán)聚合的研究。本論文主要分為三部分:第一章:序論部分。主要概括敘述了可降解的聚酯材料如PCL和PLA的研究發(fā)展現(xiàn)狀以及N,O配位的配體的鋅鎂鋁金屬配合物對環(huán)酯的開環(huán)聚合的應用。第二章:以2-甲基和乙基吡啶為原料,經過鋰化,與幾種無α-H的腈發(fā)生加成消除反應,經過酸性水解、中和、萃取、蒸餾收集到配體化合物,繼續(xù)和正丁基鎂發(fā)生反應,合成相應的金屬鎂配合物,并利用核磁、元素分析和X單晶衍射儀對配合物進行結構表征,同時研究了這些金屬鎂配合物對ε-CL的開環(huán)聚合的催化性能。此外研究了金屬鋯化合物對乙烯的催化聚合。第三章:以2-甲基吡啶為原料,經鋰化,后與苯腈反應,經硫酸水解,氫氧化鈉中和,萃取提純后得到一種二聚體的配體。然后與對苯二甲腈反應,得到橋聯(lián)的[N,O,N,O]的四齒配體。8-甲基喹啉與丁基鋰的反應,帶有負電荷的丁基首先進攻缺電子的吡啶環(huán),發(fā)生親核加成反應。并對這些化合物進行核磁、以及X-ray單晶衍射的分析。
[Abstract]:In recent years, environmental problems such as white pollution have increasingly troubled people's lives. In order to solve this problem, it has biodegradability. Biocompatible and nontoxic polyester polymer materials have become the focus of scientific research. They have great economic and social benefits instead of traditional non-degradable materials. The study of ring opening polyester using metal complexes as catalyst has made great achievements, which can better control the molecular weight of polymer and narrow the molecular weight distribution. Magnesium is an essential element in the body and is non-toxic. At the same time, magnesium metal complexes have good catalytic activity and can be controlled for the ring-opening polymerization of caprolactone or lactide. The catalysts with different catalytic properties were synthesized by changing the substituents of ligands. For a long time, our group mainly studied the synthesis of Nino and N didentate metal complexes with pyridine as parent and the ring opening polymerization of cyclic esters by these metal complexes. This paper is divided into three parts: the first chapter: the preface part. The research and development of degradable polyester materials, such as PCL and PLA, and the application of zinc, magnesium, aluminum and metal complexes of Nano O ligands to ring opening polymerization of cycloesters are reviewed. In chapter 2, ligand compounds were collected from 2-methylpyridine and ethylpyridine by lithiation, and then reacted with 偽 -H free nitriles. The ligands were collected by acid hydrolysis, neutralization, extraction and distillation. The corresponding metal magnesium complexes were synthesized and characterized by NMR, elemental analysis and X-ray diffraction. The catalytic properties of these complexes for ring-opening polymerization of 蔚 -CL were also studied. In addition, the catalytic polymerization of ethylene with zirconium compounds was studied. In chapter 3, a ligand of dimer was obtained by lithiation of 2-methylpyridine, reaction with benzonitrile, hydrolysis with sulfuric acid, neutralization with sodium hydroxide, extraction and purification. The bridged tetradentate ligand. 8-methylquinoline reacted with lithium Ding Ji. The negatively charged Ding Ji first attacked the electron-deficient pyridine ring and the nucleophilic addition reaction took place. These compounds were analyzed by nuclear magnetic field and X-ray single crystal diffraction.
【學位授予單位】：山西大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：O641.4

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本文編號：2076408