Steady-State Spectroscopic and Fluorescence Lifetime Measurements of New Two-Photon Absorbing Fluorene Derivatives

Kevin D. Belfield, Mikhailo V. Bondar, Olga V. Przhonska, Katherine J. Schafer

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Steady-state excitation anisotropy, lifetimes, and time-resolved emission spectra of new 2-photon absorbing fluorene derivatives were measured in aprotic solvents at room temperature. Excitation anisotropy spectra in viscous silicon oil allowed the determination of the spectral position cf three electronic transitions S0 → S1, S0 → S 2, S0 → S3 (Si i = 1, 2, 3 are the singlet electronic states) and the angles (∼ 30°) between absorption S0 → S1 and emission S1 → S 0 dipole moments for the first electronic transition. Solvate relaxation processes in the first excited state of the investigated fluorene molecules affect the lifetimes of these states, τ1, so that experimental values of τ1 do not correspond to those calculated by Strickler and Berg theory. The influence of the molecular concentration on the fluorescence quantum yields and τ1 have been investigated.

Original languageEnglish (US)
Pages (from-to)449-454
Number of pages6
JournalJournal of Fluorescence
Volume12
Issue number3-4
DOIs
StatePublished - Dec 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Clinical Psychology
  • Social Sciences (miscellaneous)
  • Sociology and Political Science
  • Spectroscopy
  • Clinical Biochemistry
  • Law

Keywords

  • Anisotropy
  • Fluorescence lifetime
  • Steady-state spectroscopy

Fingerprint Dive into the research topics of 'Steady-State Spectroscopic and Fluorescence Lifetime Measurements of New Two-Photon Absorbing Fluorene Derivatives'. Together they form a unique fingerprint.

Cite this