Two-photon absorption of a supramolecular pseudoisocyanine J-aggregate assembly

Kevin D. Belfield, Mykhailo V. Bondar, Florencio E. Hernandez, Olga V. Przhonska, Sheng Yao

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Linear spectral properties, including excitation anisotropy, of pseudoisocyanine or 1,1′-diethyl-2,2′-cyanine iodide (PIC) J-aggregates in aqueous solutions with J-band position at 573 nm were investigated. Two-photon absorption of PIC J-aggregates and monomer molecules was studied using an open aperture Z-scan technique. A strong enhancement of the two-photon absorption cross-section of PIC in the supramolecular J-aggregate assembly was observed in aqueous solution. This enhancement is attributed to a strong coupling of the molecular transition dipoles. No two-photon absorption at the peak of the J-band was detected.

Original languageEnglish (US)
Pages (from-to)118-124
Number of pages7
JournalChemical Physics
Issue number2-3
StatePublished - Jan 5 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


  • Excitation anisotropy
  • J-aggregates
  • PIC
  • Two-photon absorption


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