Nickel(0)-Catalyzed Polycondensation of Silafluorene: Control over Molecular Weight and Polymer Growth Mechanism
Nickel(0)-Catalyzed Polycondensation of Silafluorene: Control over Molecular Weight and Polymer Growth Mechanism
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镍(0)催化硅芴缩聚:控制分子量和聚合物生长机制
DOI:
10.1021/acs.organomet.6b00459
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发表时间:
2016
期刊:
影响因子:
2.8
通讯作者:
K.
中科院分区:
文献类型:
--
作者:
Tanabe;M.; Iwase;S.; Osakada;K.
The catalytic polymerization of silafluorenes with [Ni(dmpe)2] (dmpe = 1,2-bis(dimethylphosphino)ethane) afforded 2,7-dibutoxy-9H-9-silafluorene polymers with a narrow polydispersity (Mw/Mn< 1.1). In an open vessel, the polymerization ceased shortly after complete consumption of the monomer, but transfer of the reaction mixture into a closed system resumed the polymer growth. Polymerization in a closed system with occasional removal of the evolved H2furnished soluble polymers with a maximum molecular weight ofMn= 3860. Treatment of a 2,7-dibutoxy-9H-9-silafluorene tetramer with [Ni(dmpe)2] resulted in the initial formation of a mixture of monomers and trimers, which subsequently transformed into oligomers (Si1–Si9). This polymerization involves a preferential dehydrogenative condensation between the monomer and an oligomer relative to that between oligomers, while the presence of H2regenerates the monomer after its consumption and thus promotes further polymer growth.
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影响因子:
--
作者:
M. Tanabe;Shumpei Omine;N. Ishikawa;K. Osakada;Y. Hayashi;S. Kawauchi
通讯作者:
S. Kawauchi
影响因子:
4.9
作者:
Fontaine, FG;Kadkhodazadeh, T;Zargarian, D
通讯作者:
Zargarian, D
DOI:
10.1016/0022-328x(92)80048-3
发表时间:
1992
期刊:
影响因子:
--
作者:
J. Y. Corey;Zhuang Xiao
通讯作者:
Zhuang Xiao
DOI:
10.1246/cl.1991.913
发表时间:
1991
期刊:
影响因子:
--
作者:
T. Sakakura;H. Lautenschlager;M. Nakajima;Masato Tanaka
通讯作者:
Masato Tanaka
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
二谷真司;家裕隆;安蘇芳雄;中田 憲男;N. Nagahora;Norio Nakata
通讯作者:
Norio Nakata