Tian-hao Huang, Ying-hui Wang, Tian-ning Xu, Feng-ying Yu, Han-zhuang Zhang, Yu-ran Wang. Nonlinear Optical Properties of D-π-A-π-D Type Oligomers with Different Conjugation Length[J]. Chinese Journal of Chemical Physics , 2015, 28(5): 557-562. doi: 10.1063/1674-0068/28/cjcp1504065
Citation: Tian-hao Huang, Ying-hui Wang, Tian-ning Xu, Feng-ying Yu, Han-zhuang Zhang, Yu-ran Wang. Nonlinear Optical Properties of D-π-A-π-D Type Oligomers with Different Conjugation Length[J]. Chinese Journal of Chemical Physics , 2015, 28(5): 557-562. doi: 10.1063/1674-0068/28/cjcp1504065

Nonlinear Optical Properties of D-π-A-π-D Type Oligomers with Different Conjugation Length

doi: 10.1063/1674-0068/28/cjcp1504065
  • Received Date: 2015-04-11
  • The conjugation length-dependent nonlinear optical properties of fluorenone-based linear conjugated oligomers have been investigated by experimental and theoretical methods. In-frared spectra and the steady-state absorption spectra show that the increase of conjugated unit could enhance the stretching vibration peaks of C=C and lead to a red-shift of the absorption peaks. Meanwhile, the two-photon fluorescence (TPF) intensity is gradually en-hanced with the increase of excitation energy, and the TPF effciency is obviously higher after the introduction of fluorene-ethylene units. The sum-over-states approach was used to model the two-photon absorption (TPA) cross-sections of oligomers, and the theoretical values agree well with the experimental data obtained from the femtosecond open-aperture z-scan technique. The results exhibit that the extension of conjugated system indeed plays a role in the improvement of TPA behavior of oligomers.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Nonlinear Optical Properties of D-π-A-π-D Type Oligomers with Different Conjugation Length

doi: 10.1063/1674-0068/28/cjcp1504065

Abstract: The conjugation length-dependent nonlinear optical properties of fluorenone-based linear conjugated oligomers have been investigated by experimental and theoretical methods. In-frared spectra and the steady-state absorption spectra show that the increase of conjugated unit could enhance the stretching vibration peaks of C=C and lead to a red-shift of the absorption peaks. Meanwhile, the two-photon fluorescence (TPF) intensity is gradually en-hanced with the increase of excitation energy, and the TPF effciency is obviously higher after the introduction of fluorene-ethylene units. The sum-over-states approach was used to model the two-photon absorption (TPA) cross-sections of oligomers, and the theoretical values agree well with the experimental data obtained from the femtosecond open-aperture z-scan technique. The results exhibit that the extension of conjugated system indeed plays a role in the improvement of TPA behavior of oligomers.

Tian-hao Huang, Ying-hui Wang, Tian-ning Xu, Feng-ying Yu, Han-zhuang Zhang, Yu-ran Wang. Nonlinear Optical Properties of D-π-A-π-D Type Oligomers with Different Conjugation Length[J]. Chinese Journal of Chemical Physics , 2015, 28(5): 557-562. doi: 10.1063/1674-0068/28/cjcp1504065
Citation: Tian-hao Huang, Ying-hui Wang, Tian-ning Xu, Feng-ying Yu, Han-zhuang Zhang, Yu-ran Wang. Nonlinear Optical Properties of D-π-A-π-D Type Oligomers with Different Conjugation Length[J]. Chinese Journal of Chemical Physics , 2015, 28(5): 557-562. doi: 10.1063/1674-0068/28/cjcp1504065

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