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自Ziegler-Natta催化剂发现以来,d元素的催化作用一直是人们探索的对象.K.Matsuzaki等系统地研究了第四周期的过渡元素,发现Ni和Ti相对有较高的活性,而Fe,Mn活性极低.我们报导了Fe系催化剂在第三组份菲绕啉(Phen)和联二吡啶(bPy)参与下对双烯烃聚合达到前所未有的活性.从而使以前对d组元素活性的解释受到了冲击,启发我们研究第三组份对d组元素的作用.本工作研究第四周期d~(4-8)元素发现了与前人相反的变化规律,从而提出了我们的解释.它丰富和发展了d组元素催化作用的内容,将
Since the discovery of Ziegler-Natta catalyst, the catalytic effect of d element has been the subject of exploration.K. Matsuzaki et al systematically studied the transition elements of the fourth cycle and found relatively high activity of Ni and Ti, while Fe, Mn We report that Fe-based catalysts have achieved unprecedented activity in the polymerization of diolefins with the aid of the third component, phenanthroline and bipyridyl (bPy), thus allowing the previous interpretation of the d-group elemental activity to be affected The impact inspired us to study the effect of the third component on the elements of group D. The fourth cycle of this work d ~ (4-8) elements found a change in the opposite direction of the predecessors, and thus put forward our explanation. It is rich And the development of the d group elements of the catalytic role will be