文献类型：期刊文献

英文题名：A New Cyanofluorene-Triphenylamine Copolymer: Synthesis and Photoinduced Intramolecular Electron Transfer Processes

作者：Lin, Ying[2];El-Khouly, Mohamed E.[1];Chen, Yu[2];Supur, Mustafa[1];Gu, Lingling[2];Li, Yongxi[2];Fukuzumi, Shunichi[1]

机构：[1]Osaka Univ, Grad Sch Engn, Dept Mat & Life Sci, SORST Japan Sci & Technol Agcy JST, Suita, Osaka 5650871, Japan;[2]E China Univ Sci & Technol, Dept Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2009

卷号：15

期号：41

起止页码：10818

外文期刊名：CHEMISTRY-A EUROPEAN JOURNAL

收录：;EI(收录号：20094412411328);WOS:【SCI-EXPANDED(收录号:WOS:000271605900018)】；

基金：We are grateful for financial support from the National Natural Science Foundation of China (20676034, 20876046), the Ministry of Education of China (309013), and the Shanghai Municipal Educational Commission for a Shuguang fellowship (08GG10) and Shanghai Eastern Scholarship, respectively. M. Supur thanks the Ministry of Education, Culture, Sports, Science and Technology, Japan for financial support.

语种：英文

外文关键词：copolymerization; electron transfer; knoevenagel reaction; polyfluorene; polymerization

摘要：A new pi-conjugated copolymer, namely, poly{cyanofluore-alt-[5-(N,N'-diphenylamino)phenylenevinylene]} ((CNF-TPA)(n)), was synthesized by condensation polymerization of 2,2'-(9,9-dioctyl-9H-fluorene-2,7-diyl)diacetonitrile and 5-(N,N'-diphenylamino)benzene-1,3-dicarbaldehyde by using the Knoevenagel reaction. By design, diphenylamine, alkylfluorene and poly(p-phenylenevinylene) linkages were combined to form a (CNF-TPA)(n) copolymer which exhibits high thermal stability and glass-transition temperature. Photodynamic measurements in polar benzonitrile indicate fast and efficient photoinduced electron transfer (approximate to 10(11) s(-1)) from triphenylamine (TPA) to cyanofluorene (CNF) to produce the long-lived charge-separated state (90 mu s). The finding that the charge-recombination process of (CNF center dot--TPA(center dot+))(n) is much slower than the charge separation in polar benzonitrile suggests a potential application in molecular-level electronic and optoelectronic devices.