Two-photon absorption properties of new fluorene-based singlet oxygen photosensitizers

Kevin D. Belfield, Mykhailo v. Bondar, Florencio E. Hernandez, Artëm E. Masunov, Ivan A. Mikhailov, Alma R. Morales, Olga v. Przhonska, Sheng Yao

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

The degenerate two-photon absorption (2PA) spectra of several fluorene-based photosensitizers (PS) in solution were obtained over a broad spectral range (460-880 nm) by open aperture Z-scan and two-photon fluorescence methods under either picosecond or femtosecond excitation, respectively. A maximum 2PA cross section of ca. 300 GM was observed for the photosensitizers containing a benzothiazole substituent in the fluorenyl 7-position. The electronic structures and 2PA properties of these PS were analyzed using a time-dependent density functional theory method, resulting in reasonably good agreement between experimental and theoretical data.

Original languageEnglish (US)
Pages (from-to)4706-4711
Number of pages6
JournalJournal of Physical Chemistry C
Volume113
Issue number11
DOIs
StatePublished - Mar 19 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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