Linear and Nonlinear Optical Properties of Novel Multi-branched Oligomers

被引：9
作者：
Gong, Li-jing [1 ,3 ]
Wang, Ying-hui [1 ]
Kang, Zhi-hui [1 ]
Huang, Tian-hao [1 ]
Ran Lu [2 ]
Zhang, Han-zhuang [1 ]
机构：
[1] Jilin Univ, Coll Phys, Changchun 130012, Peoples R China
[2] Jilin Univ, Coll Chem, Changchun 130012, Peoples R China
[3] Aviat Univ AF, Changchun 130022, Peoples R China
来源：
CHINESE JOURNAL OF CHEMICAL PHYSICS | 2012年 / 25卷 / 06期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Multi-branch oligomer; Two-photo absorption; Z-scan; 2-PHOTON ABSORPTION; FLUORESCENCE; MOLECULES;
D O I：
10.1088/1674-0068/25/06/636-641
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
We investigate the fluorene-vinylene unit dependent photo-physical properties of multi-branched truxene based oligomers (Tr-OFVn, n=1-4) employing steady-state absorption and emission spectroscopy, transient absorption spectroscopy, two-photon fluorescence, and z-scan technique. The results show that the increasing of fluorene-vinylene unit leads to a red-shift in the spectra of. absorption and fluorescence, and shortens the excited state lifetime. Meanwhile, two-photon fluorescence efficiency and two-photon absorption cross section of truxene based oligomers gradually enhance in company with the extension of pi-conjugated length. In addition, the values of two-photon absorption cross section modeled on the sum-over-state approach agree well with the experimental ones. The results indicate multi-branched truxene based oligomers bearing oligo(fluorene-vinylene) arms are promising organic materials for two-photon applications.
引用
收藏
页码：636 / 641
页数：6
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