Two photon absorption properties of bis(n-carbazolyl)-poly-phenylenes

Z. Kotler, J. Segal, M. Sigalov, A. Ben-Asuly, V. Khodorkovsky

Research output: Contribution to journalConference articlepeer-review

34 Scopus citations


We studied the two photon absorption (TPA) properties of conjugated, symmetric bis(N-carbazolyl)-di-phenylpolyenes and bis(N-carbazolyl)-tri-phenylpolyenes. These novel molecules relate to the family of bis-donor-di-phenylpolynene recently shown to possess very high two-photon absorption and fluorescence coefficients. The symmetric substitution of carbazole end-groups enhances the photostability of the molecules and at the same time maintains high TP coefficients (δmax>1000 GM) as determined from two-photon fluorescence measurements with picosecond pulse excitation. A blue shift of the linear absorption and a red shift of the TP peak reflect a larger proximity of the one and two photon states in carbazole substituted chromophores. High fluorescence quantum yield (0.6-0.8) was found in most of the molecules studied. These results suggest that efficient and photo-stable TP chromophores with carbazole donors are promising materials for applications in two-photon imaging and sensitization.

Original languageEnglish
Pages (from-to)269-273
Number of pages5
JournalSynthetic Metals
Issue number1
StatePublished - 1 Nov 2000
EventProccedings of the European Materials Research Society 1999 Spring Meeting, Symposium N: Molecular Photonics at the Interface of Physics, Chemistry and Biology - Strasbourg, France
Duration: 1 Jun 19994 Jun 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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