Two-photon absorption properties of dehydrobenzo[12]annulenes and hexakis(phenylethynyl)benzenes: Effect of edge-linkage

Kenji Kamada*, Liudmil Antonov, Satoru Yamada, Koji Ohta, Takashi Yoshimura, Kazukuni Tahara, Akiko Inaba, Motohiro Sonoda, Tobe Yoshito

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Two-photon absorption (TPA) properties of two trefoil-shaped compounds with different edge linkages - tris(hexadehydrotribenzo[12]annulene) and tris(tetradehydrotribenzo[12]annulene) - and three asterisk-shaped compounds having no edge-linkage - hexakis(phenylethynyl)benzenes - are investigated experimentally by the open-aperture Z-scan and TPA-induced fluorescence methods with wavelength tuneable femtosecond pulses. The compound with ethynylene edge-linkage exhibits the most intense TPA (the maximal TPA cross section is 1300±170 GM at 572 nm where 1 GM = 10-50 cm4s molecule-1 photon-1). The TPA activity of the compounds is primarily explained in terms of the planarity of the molecules in relation with the type of edge-linkage.

Original languageEnglish
Pages (from-to)2671-2677
Number of pages7
JournalChemPhysChem
Volume8
Issue number18
DOIs
StatePublished - 20 Dec 2007

Keywords

  • Aromatic compound
  • Electronic coupling
  • Fluorescence
  • Hydrocarbons
  • Two-photon absorption

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