σ-π Conjugated Organosilicon Hybrid Polymers from Copolymerization of a Tetrasiladiene and 1,4-Diethynylbenzene

被引：20
|
作者：
Majumdar, Moumita [1 ]
Bejan, Iulia [1 ]
Huch, Volker [1 ]
White, Andrew J. P. [2 ]
Whittell, George R. [3 ]
Schaefer, Andre [3 ]
Manners, Ian [3 ]
Scheschkewitz, David [1 ]
机构：
[1] Univ Saarland, Krupp Chair Gen & Inorgan Chem, D-66125 Saarbrucken, Germany
[2] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England
[3] Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England
来源：
CHEMISTRY-A EUROPEAN JOURNAL | 2014年 / 20卷 / 30期
关键词：
conjugation; copolymerization; cycloaddition; hybrid polymers; silicon; ADDITION POLYMERIZATION; DOUBLE-BONDS; BAND-GAP; CHEMISTRY; PHOSPHAALKENE; CYCLOADDITION; COORDINATION; DISILENES; PHENYLENE; DESIGN;
D O I：
10.1002/chem.201403494
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A catalyst- and by-product-free protocol for the synthesis of sigma-pi conjugated organosilicon polymers is reported. The regiospecific [2+2] cycloaddition of C C triple bonds to Si=Si double bonds allowed the preparation of air-stable ethynyl-terminated extended monomers from 1,4-bis( ethynyl) benzene and the para-phenylene bridged tetrasiladiene, Tip(2)Si=SiTip-pC(6)H(4)-SiTip=SiTip(2) (Tip=2,4,6=iPr(3)C(6)H(2)). The polymer obtained from the extended monomer and further tetrasiladiene exhibits pronounced sigma-pi conjugation, as was evident from the red-shift in the absorption spectrum compared to model systems. We show that the thermal stability of the employed bis(alkyne) co-monomer is translated into this polymer.
引用
收藏
页码：9225 / 9229
页数：5
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