In Situ Generated Heterometallic Nickel–Zinc Catalysts for Ethylene Polymerization

In Situ Generated Heterometallic Nickel–Zinc Catalysts for Ethylene Polymerization
复制标题

原位生成异金属镍锌催化剂用于乙烯聚合

DOI:
10.1021/acs.organomet.8b00454
复制
发表时间:
2018
期刊:
影响因子:
2.8
通讯作者:
Do, Loi H.
Do, Loi H.
中科院分区:
化学2区
文献类型:
--
作者:
Xiao, Dawei;Do, Loi H.

文献摘要

参考文献

被引文献

相似文献

我们合成了一系列以1-吡啶甲基-4-甲酰胺基-1,2,3-三唑为配体的新型金属镍配合物。溶液金属结合的NMR光谱研究表明,它们与氯化锌的反应导致形成的镍锌杂金属与不确定的组合物。这些镍-锌络合物在3小时的过程中表现出增加的乙烯聚合活性,并提供具有多峰分布的聚合物。相比之下,随着时间的推移,镍配合物表现出恒定的活性,并得到窄分散的低分子量聚乙烯(Mn= 103)。在镍催化剂中添加ZnCl 2以外的锌源或其它金属盐并不能提高其催化性能。我们的研究结果表明,需要进一步修改的carboxamidatetriazole平台,以获得良好定义的杂环化合物的乙烯基聚合物的控制合成。
We have prepared a new series of organometallic nickel complexes ligated by 1-picolyl-4-carboxamidate-1,2,3-triazole donors. Solution metal binding studies by NMR spectroscopy indicated that their reactions with zinc chloride led to the formation of nickel–zinc heterometallics with undefined compositions. These nickel–zinc complexes showed increasing ethylene polymerization activity over the course of 3 h and provided polymers with multimodal distributions. In comparison, the mononickel complexes exhibited constant activity over time and gave narrowly dispersed low molecular weight polyethylene (Mn= ∼103). The addition of zinc sources other than ZnCl2or other metal salts to the mononickel catalysts did not lead to enhancements in their catalytic performance. Our results suggest that further modifications of the carboxamidatetriazole platform are needed to obtain well-defined heterobimetallic complexes for the controlled synthesis of ethylene-based polymers.
DOI: 10.1002/anie.201404339
发表时间: 2014-08
期刊: Angewandte Chemie
影响因子: --
作者:
Shigenaga Takano;Daisuke Takeuchi;K. Osakada;N. Akamatsu;A. Shishido
通讯作者: Shigenaga Takano;Daisuke Takeuchi;K. Osakada;N. Akamatsu;A. Shishido
DOI: 10.1055/s-0033-1340823
发表时间: 2014-06-01
期刊: SYNLETT
影响因子: 2
作者:
Mankad, Neal P.
通讯作者: Mankad, Neal P.
三唑甲酰胺酯供体作为镍烯烃聚合催化剂的支持配体
DOI: --
发表时间: 2018
期刊:
影响因子: --
作者:
Dawei Xiao;L. Do
通讯作者: L. Do