Li-jing Gong, Ying-hui Wang, Zhi-hui Kang, Tian-hao Huang, Ran Lu, Han-zhuang Zhang. Linear and Nonlinear Optical Properties of Novel Multi-branched Oligomers[J]. Chinese Journal of Chemical Physics , 2012, 25(6): 636-641. doi: 10.1088/1674-0068/25/06/636-641
Citation: Li-jing Gong, Ying-hui Wang, Zhi-hui Kang, Tian-hao Huang, Ran Lu, Han-zhuang Zhang. Linear and Nonlinear Optical Properties of Novel Multi-branched Oligomers[J]. Chinese Journal of Chemical Physics , 2012, 25(6): 636-641. doi: 10.1088/1674-0068/25/06/636-641

Linear and Nonlinear Optical Properties of Novel Multi-branched Oligomers

doi: 10.1088/1674-0068/25/06/636-641
Funds:  This work was supported by the National Nat-ural Science Foundation of China (No.10774060,No.10974071, No.21103161, and No.11274142), the Jilin Province Natural Science Foundation of China (No.20070512), the National Undergraduate Innova-tion Foundation of China (No.2011A32045), the Na-tional Foundation for Fostering Talents of Basic Sci-ence (No.J1103202), and the China Postdoctoral Sci-ence Foundation (No.2011M500927).
  • Received Date: 2012-10-19
  • 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 π-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 promisingorganic materials for two-photon applications.
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Linear and Nonlinear Optical Properties of Novel Multi-branched Oligomers

doi: 10.1088/1674-0068/25/06/636-641
Funds:  This work was supported by the National Nat-ural Science Foundation of China (No.10774060,No.10974071, No.21103161, and No.11274142), the Jilin Province Natural Science Foundation of China (No.20070512), the National Undergraduate Innova-tion Foundation of China (No.2011A32045), the Na-tional Foundation for Fostering Talents of Basic Sci-ence (No.J1103202), and the China Postdoctoral Sci-ence Foundation (No.2011M500927).

Abstract: 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 π-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 promisingorganic materials for two-photon applications.

Li-jing Gong, Ying-hui Wang, Zhi-hui Kang, Tian-hao Huang, Ran Lu, Han-zhuang Zhang. Linear and Nonlinear Optical Properties of Novel Multi-branched Oligomers[J]. Chinese Journal of Chemical Physics , 2012, 25(6): 636-641. doi: 10.1088/1674-0068/25/06/636-641
Citation: Li-jing Gong, Ying-hui Wang, Zhi-hui Kang, Tian-hao Huang, Ran Lu, Han-zhuang Zhang. Linear and Nonlinear Optical Properties of Novel Multi-branched Oligomers[J]. Chinese Journal of Chemical Physics , 2012, 25(6): 636-641. doi: 10.1088/1674-0068/25/06/636-641

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