The catalytic behavior of heterocenes activated by TIBA and MMAO under a low Al/Zr ratios in 1-octene polymerization
作者:Ilya E. Nifant'ev、Alexander A. Vinogradov、Alexey A. Vinogradov、Andrei V. Churakov、Vladimir V. Bagrov、Igor A. Kashulin、Vitaly A. Roznyatovsky、Yury K. Grishin、Pavel V. Ivchenko
DOI:10.1016/j.apcata.2018.12.006
日期:2019.2
absence of molecular hydrogen, derivatives of cyclopenta[1,2-b:4,3-b']dithiophene and dihydroindeno[2,1-b]indole demonstrated high catalytic activity, while dihydroindeno[1,2-b]indole complexes catalyzed slow polymerization with the formation of ultrahigh molecular weight poly(1-octene)s. In the presence of molecular hydrogen, derivatives of dihydroindeno[1,2-b]indole showed an order of magnitude increase
一系列森达的2 -bridged安莎-zirconocenes LZrCl 2从杂环衍生的配体,如环戊二烯并[1,2- b:4,3- b “]二噻吩,5,6-二氢茚并[2,1- b ]吲哚和5-合成10,10-二氢茚并[1,2- b ]吲哚,称为“异新世”,并通过NMR光谱和X射线衍射分析对其进行表征。这些配合物被三异丁基铝(TIBA)以Al TIBA / Zr比〜75活化,然后被MMАO-12以Al MAO / Zr比〜10活化,并在不存在或存在分子氢的情况下在1-辛烯的聚合反应中进行了研究。 。在没有分子氢的情况下,环戊[1,2-b:4,3- b ']二噻吩和二氢茚并[2,1- b ]吲哚表现出高催化活性,而二氢茚并[1,2- b ]吲哚配合物催化缓慢聚合并形成超高分子量聚(1-辛烯)。在分子氢的存在下,二氢茚并[1,2- b ]吲哚的衍生物显示出催化活性的数量级增加。根据所用配体的性