Nonlinear optical and two-photon absorption properties of 1,3,5-tricyano-2,4,6-tris(styryl)benzene-containing octupolar oligomers

Bong Rae Cho, Ming Jun Piao, Kyung Hwa Son, Sang Hae Lee, Soo Jung Yoon, Seung Joon Jeon, Minhaeng Cho

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

Octupolar oligomers containing 2-12 molecules of 1,3,5-tricyano- 2,4,6-tris(styryl)benzene derivatives have been synthesized and their nonlinear optical and two-photon absorption (TPA) properties were determined. The β(0) values are in the range of (85- 1219) × 10-30 esu and increase monotonically with the increasing number of the octupolar units within the molecule. The two-photon-induced fluorescence excitation spectra are quite similar to the single-photon absorption spectra except that the wavelength is doubled, indicating that the one- and two-photon allowed excited states are the same. The peak TPA cross-section values (δmax) measured with nanosecond pulses by the two-photon-induced fluorescence method are in the range (3010-62930) × 10-50 cm4s photon-1. The δmax increases as the number of the octupolar units in the molecules increases. A linear relationship is observed between δmax and β, and this δ-β relationship serves as a useful design strategy for the synthesis of novel octupolar oligomers and polymers with large TPA and β.

Original languageEnglish
Pages (from-to)3907-3916
Number of pages10
JournalChemistry - A European Journal
Volume8
Issue number17
DOIs
Publication statusPublished - 2002 Sep 2

Keywords

  • Fluorescence
  • Nonlinear optics
  • Octupole
  • Polymers
  • Two-photon absorption

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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