Ladder bis-silicon-bridged stilbenes as a new building unit for fluorescent π-conjugated polymers
Ladder bis-silicon-bridged stilbenes as a new building unit for fluorescent π-conjugated polymers
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DOI：
10.1021/ma0486546
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发表时间：
2004-10
期刊：
影响因子：
5.5
通讯作者：
Caihong Xu;H. Yamada;A. Wakamiya;†. A. Shigehiro Yamaguchi;K. Tamao
中科院分区：
文献类型：
--
作者：
Caihong Xu;H. Yamada;A. Wakamiya;†. A. Shigehiro Yamaguchi;K. Tamao
π-Conjugated polymers containing the bis-silicon-bridged stilbene (5,10-dihydro-5,10-disilaindeno[2,1-a]indene) skeleton in the main chain have been synthesized. Our synthesis uses 3,8-dimethoxy derivatives (2) and 3,8-difluoro derivatives (3) of the bis-silicon-bridged stilbene as the key precursors. Thus, their regioselective ortho-metalation reactions with appropriate bases (sec-butyllithium for 2 and LitBu2ZnTMP for 3) followed by quenching with electrophiles afford various 2,7-difunctionalized bis-silicon-bridged stilbenes. By using the 2,7-difunctionalized derivatives as starting materials, a series of π-conjugated polymers, including homopolymers of the bis-silicon-bridged stilbene skeleton and copolymers between the bis-silicon-bridged stilbene unit and other types of monomer units, such as bithiophene and diethynylbenzene, have been synthesized by cross-coupling methodologies. While all the homopolymers of the bis-silicon-bridged stilbene skeleton exhibit an intense blue to greenish-blue emission...
