Strong two-photon absorption and two-photon excited fluorescence emission of heterofluorene derivatives

被引：24
作者：
Wang, XM [1 ]
Yang, P
Jiang, WL
Xu, GB
Guo, XZ
机构：
[1] Suzhou Univ, Coll Mat Sci & Engn, Suzhou 215021, Peoples R China
[2] Suzhou Univ, Dept Chem, Suzhou 215021, Peoples R China
[3] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
来源：
OPTICAL MATERIALS | 2005年 / 27卷 / 06期
基金：
中国国家自然科学基金;
关键词：
2,8-bis-[(2-4 '-ethoxylphenyl-5-4 '-styryl)-1,3,4-oxadiazoleldibenzothiophene; 2,8-bis-[(2-4 '-ethoxylphenyl-5-4 '-styryl)-1,3,4-oxadiazole]-N-ethylcarbazole; two-photon absorption; two-photon excited fluorescence;
D O I：
10.1016/j.optmat.2004.08.081
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Two new chromophores: 2,8-bis[2-(4'-ethoxylphenyl)-5-(4'-styryl)-1,3,4-oxadiazole]dibenzothiophene (abbreviated as SO-G1) and 2,8-bis[(2-(4'-ethoxylphenyl)-5-(4'-styryl)-1,3,4-oxadiazole-N-ethylcarbazole (abbreviated as NO-G1) that exhibit strong two-photon absorption and enhanced two-photon excited fluorescence were synthesized based on "push-pull-core-pull-push" elongated molecules built from a rigid dibenzothiophene or carbazole. Both chromophores in different solvent are highly transparent across almost the whole visible spectrum region and possess highest fluorescence quantum yield of 0.89 for NO-G1 and 0.46 for SO-G1. Pumped by a visible wavelength (700-800nm) of Ti: sapphire femto-second laser pulses, strong two-photon excited (TPE) fluorescence located at 440-510 nm with the TPE fluorescence emission cross-section (delta(TPF)) being 21-8.2 times as much as that of fluorescein reference and strong two-photon absorption (TPA) cross-section (delta(TPA)) of 454-377 GM have been observed. (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：1163 / 1170
页数：8
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