Synthesis of novel poly(dithienylpyridines)Electronic supplementary information (ESI) available: further experimental details. See http://www.rsc.org/suppdata/jm/b2/b201229d/
作者:Glen M. Chapman、Stephen P. Stanforth、Rory Berridge、Cristina Pozo-Gonzalo、Peter J. Skabara
DOI:10.1039/b201229d
日期:2002.7.26
This paper describes the chemical and electrochemical synthesis of novel copolymers of thiophene and pyridine. Di-iodination of 3-hydroxypyridine 12 followed by O-substitution gave a series of ethers 14b–d and esters/carbamates 15a–d which were reacted with the stannylated bithiophene derivative 17 in a Stille cross-coupling reaction yielding poly (1b–d) and poly (2a–d) respectively. These chemical polymerisation reactions generally resulted in highly insoluble materials which were difficult to characterise. Ethers 14b–d and
esters/carbamates 15a–d gave O-substituted 3-hydroxy-2,6-di(2-thienyl)pyridines 1b–d and 2a–d respectively in Stille cross-coupling reactions with the stannylated thiophene 16. Ethers 1b–d underwent electrochemical polymerisation allowing the synthesis of O-alkylated polymers, poly (1b–d), with electrochemical band-gaps of 1.4 to 1.6 eV. In contrast, the esters/carbamates 2a–d could not be electropolymerised.
本文描述了噻吩和吡啶新型共聚物的化学和电化学合成。对3-羟基吡啶12进行双碘化后,通过O-取代反应得到了系列醚14b–d和酯/氨基甲酸酯15a–d,这些化合物与锡基双噻吩衍生物17在Stille交叉偶联反应中反应,分别生成聚合物poly (1b–d)和poly (2a–d)。这些化学聚合反应通常导致高不溶性材料,难以表征。醚14b–d和酯/氨基甲酸酯15a–d在与锡基噻吩16的Stille交叉偶联反应中分别生成O-取代的3-羟基-2,6-二(2-噻吩基)吡啶1b–d和2a–d。醚1b–d进行了电化学聚合,从而合成了O-烷基化聚合物poly (1b–d),其电化学带隙为1.4至1.6 eV。相比之下,酯/氨基甲酸酯2a–d无法进行电聚合。