New fluorene-based fluorescent probe with efficient two-photon absorption

M. V. Bondar, O. V. Przhonska, O. D. Kachkovsky, A. Frazer, A. R. Morales, K. D. Belfield

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The synthesis, linear photophysical characterization, and two-photon absorption (2PA) properties of new fluorene derivative 3,3'-(pyridine-2,6-diyl)bis(1-(7-(diphenylamino)-9,9-dihexyl- 9H-fluoren-2-yl)propane-1,3-dione) (1) have been presented. The steady-state absorption, fluorescence and excitation anisotropy spectra along with the fluorescence decay kinetics of 1 are obtained in the solvents of different polarities at room temperature with respect to its potential application in bioimaging. The analysis of linear photophysical properties revealed a complicated nature of the main one-photon absorption band of 1, and the strong solvatochromic effect in steady-state fluorescence spectra is observed. The degenerate 2PA spectrum of 1 is measured in the spectral range 570-970 nm with the use of the open aperture Z-scan method under the 1-kHz femtosecond excitation, and the maximum values of two-photon action cross sections ~(100-130) GM are obtained. The nature of the linear absorption and the 2PA bands is analyzed by quantum chemical methods using a Gaussian program package.

Original languageEnglish (US)
Pages (from-to)748-757
Number of pages10
JournalUkrainian Journal of Physics
Issue number8
StatePublished - 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


  • Fluorene
  • Two-photon absorption
  • Z-scan method


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