文献类型：期刊文献

英文题名：Linear and tri-branched copolymers for two-photon absorption and two-photon fluorescent materials

作者：Meng, Fanshun[1]; Mi, Jun[2]; Qian, Shixiong[2]; Chen, Kongchang[1]; Tian, He[1]

机构：[1]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[2]Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China

年份：2003

卷号：44

期号：22

起止页码：6851

外文期刊名：POLYMER

收录：;EI(收录号：2003427676537);WOS:【SCI-EXPANDED(收录号:WOS:000185837900012)】；

语种：英文

外文关键词：two-photon absorption materials; two-photon induced fluorescence; copolymers

摘要：The one- and two-photon properties of linear (M2) and tri-branched (M3) copolymers with triphenylamine and cyano groups in the main chain were experimentally investigated. Open-aperture z-scan experiments were performed with I kHz, 120 fs, and 800 nm Ti:sapphire laser pulses to measure the two-photon absorption cross sections. The two-photon cross sections of M2 and M3 were determined to be 0.304 and 1.441 x 10(-20) cm(4)/Gw per repeating unit, respectively. lit a CHCl3 solution, M2 and M3 emit strong frequency up-converted fluorescence under the excitation of 120 fs pulses at 800 nm with the peaks located at 561 and 542 nm. (C) 2003 Elsevier Ltd. All rights reserved.