Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
Dalton Trans. 2011 Sep 7;40(33):8436-43. doi: 10.1039/c1dt10541h. Epub 2011 Jul 21.
A series of N-(5,6,7-trihydroquinolin-8-ylidene)arylamine ligands was synthesized and fully characterized by NMR, IR spectroscopy and elemental analysis. Dimeric N-(5,6,7-trihydroquinolin-8-ylidene)arylaminonickel dichlorides were prepared and examined by IR spectroscopy and elemental analysis, and the molecular structures of the representative nickel complexes were determined by the single crystal X-ray diffraction. On treatment with various alkylaluminiums, all the title complexes exhibited highly active, single-site active behavior for ethylene polymerization producing polyethylene (PE) waxes. The catalytic systems using the co-catalysts diethylaluminium chloride (Et(2)AlCl) or methylaluminoxane (MAO) were investigated in detail, and the molecular weights and distributions of the PEs obtained were found to significantly rely on the nature of the different ligands present and reaction parameters such as the molar ratios of Al/Ni, reaction temperature and reaction time.
一系列 N-(5,6,7-三氢喹啉-8-亚基)芳基胺配体被合成，并通过 NMR、IR 光谱和元素分析进行了充分的表征。二聚 N-(5,6,7-三氢喹啉-8-亚基)芳基胺二氯化镍被制备并通过 IR 光谱和元素分析进行了检查，代表性镍配合物的分子结构通过单晶 X 射线衍射确定。用各种烷基铝处理后，所有标题配合物在乙烯聚合生成聚乙烯（PE）蜡时表现出高活性、单活性位活性。详细研究了使用助催化剂二乙基氯化铝（Et(2)AlCl）或甲基铝氧烷（MAO）的催化体系，发现获得的 PE 的分子量和分布显著依赖于存在的不同配体的性质以及反应参数，如 Al/Ni 的摩尔比、反应温度和反应时间。
