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Synthesis and properties of imidazole side-chain functionalized Group 4 indenyl-type metallocenesдипломная работа (Специалист)
- Научный руководитель: Borzov Maxim V.
- Автор: Zhuo Fei
- Тип: Специалист
- Организация, в которой проходила защита: College of Chemistry and Material Science, the North-West University of Xi’an, Taibai Bei Avenue 229, Xi’an 710069, Shaanxi Province, People’s Republic of China
- Год защиты: 2013
- Аннотация: In the modern world, the needs of industry require exponentially growing amounts of a variety of polymers. Moreover, nowadays the focus of interest is shifting from the "classical" polymers like polyvinyl chloride, polyethylene, polypropylene, polystyrene, etc. towards more "sophisticated" macromolecules. Among the latter, there are polymers of high stereoregularity, co-polymers, block co-polymers and others. Of course, this arises the pronounced demand for catalytic systems of new generation. Zwitterionic metallocene-type complexes which are in the focus of interest of this research work belong to this family of novel and prospective catalysts.for olefin polymerization. The present investigation comprises several interlinked parts. At the first step, we have developed improved synthetic procedures for several 1H-inden-3-yl side-chain functionalized imidazoles, namely: 2-[2-(1H-inden-3-yl)-2,2-diphenylethyl]- (la), 2-[2-(1H-inden-3-yl)-2-methylpropyl]- (lb), 2-[2-(1H-inden-3-yl)-2-phenylethyl]- (lc) 1H-imidazoles. The second part of the investigation concerned preparation of transition metal complexes derived from la-d. Thus, treatment of la, lb, lc with M(NEt2)4 (M = Ti, Zr) in an aromatic solvent smoothly yielded {2-[2-(h5-1H-inden-3-yl)-2,2-diphenylethyl]-1H-imidazolido-kN}bis(N,N-diethylamido)ziroconiums 2a, and corresponding 2b, 2c. 2a, 2b, 2c react with trimethylchlorosilane could transformed to the target chloride products 3a, 3b, 3c. 3a reactions respectively with BCF, triisobutylaluminium, trimethylaluminium did not get the target zwitterionic products. The activities of 3a, 3b in the polymerization of borneolene and styrene have been investigated. For the polymerization of borneolene the optimization conditions of Al/Zr ratio is 700:1, the temperature is 7o c. The polymerization activity is up to 14.85 Kg/mol*h. Through infrared spectrum and nuclear magnetic data analysis, we knew that the obtained norbornadiene mainly undergoes addition polymerization. The steric substituents have also obvious effect on the polymerization activity~ As for polymerization of styrene the optimal conditions of Al/Zr ratio is 700:1 too, the reaction temperature is 110 c.
- Добавил в систему: Борзов Максим Владимирович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | ZhuoFei.pdf | 20,7 МБ | 26 ноября 2018 [BorzovMV] |