Balancing steric and electronic effects of bidentate, mixed P,N ligands to control Kumada catalyst transfer polycondensation of a sterically hindered thiophene
Balancing steric and electronic effects of bidentate, mixed P,N ligands to control Kumada catalyst transfer polycondensation of a sterically hindered thiophene
复制标题
平衡双齿、混合 P、N 配体的空间和电子效应以控制空间位阻噻吩的 Kumada 催化剂转移缩聚
DOI:
10.1039/c8py00452h
复制
发表时间:
2018
影响因子:
4.6
通讯作者:
M. Sommer
中科院分区:
文献类型:
--
作者:
S. Hameury;C. Gourlaouen;M. Sommer
The polymerization of sterically hindered thiophenes via Kumada catalyst transfer polycondensation (KCTP) has been shown to be challenging to control using catalysts with bidentate diphosphine ligands but promising with mixed P,N ligands. Herein we present a broad range of NiII and PdII complexes bearing either diphosphines or hybrid P,N ligands for catalyzing the KCTP of 2-bromo-3-(2,5-dioctylphenyl)-5-iodothiophene. Among these, catalytic activity and control over the reaction was optimized by a subtle balance of sterics and electronics of the mixed P,N ligand. The best performance was obtained with an oxazoline-based P,N ligand. Density functional theory calculations indicate that the association energies between Ni0 and the polythiophene backbone are higher for hybrid P,N ligands compared to diphosphines and highest for the oxazoline-based P,N ligand. This explains the reduced tendency for dissociation, resulting in decreased chain termination and higher conversion. This study broadens the range of available catalysts for KCTP useful for the polymerization of sterically hindered thiophene monomers.
登录
查看更多内容
影响因子:
2.8
作者:
S. Angerer;S. Warriner
通讯作者:
S. Warriner
影响因子:
4
作者:
Naeimeh Bahri‐Laleh;A. Poater;L. Cavallo;Seyed Amin Mirmohammadi
通讯作者:
Seyed Amin Mirmohammadi
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
M. Bhatt;H. D. Magurudeniya;P. Sista;E. Sheina;M. Jeffries‐EL;Benjamin G. Janesko;R. D. Mccullough;M. Stefan
通讯作者:
M. Stefan
影响因子:
5.8
作者:
Daniel Schiefer;T. Wen;Yingyi Wang;Pierre Goursot;H. Komber;R. Hanselmann;P. Braunstein;G. Reiter-G.
通讯作者:
Daniel Schiefer;T. Wen;Yingyi Wang;Pierre Goursot;H. Komber;R. Hanselmann;P. Braunstein;G. Reiter-G.
影响因子:
5.5
作者:
Hamidi-Sakr, Amer;Schiefer, Daniel;Brinkmann, Martin
通讯作者:
Brinkmann, Martin