TY - JOUR
T1 - One- and two-photon fluorescence anisotropy of selected fluorene derivatives
AU - Belfield, K. D.
AU - Bondar, M. V.
AU - Hales, J. M.
AU - Morales, A. R.
AU - Przhonska, O. V.
AU - Schafer, K. J.
N1 - Funding Information:
The National Science Foundation (ECS-9970078, ECS-0217932, DMR-9975773), National Research Council (COBASE), Research Corporation, and the donors of The Petroleum Research Fund of the American Chemical Society are gratefully acknowledged for support of this work.
PY - 2005/1
Y1 - 2005/1
N2 - The steady-state excitation anisotropy spectra of fluorene derivatives were measured in viscous solvents, under the one- and two-photon excitation, over a broad spectral range (UV-Visible). The orientation of their absorption transition moments for the first, S 0→S 1, and second, S 0→S 2, excited states were determined. It was shown experimentally that a decrease in the angle between S 0→S 1and S 0→S 2 transitions corresponded to an increased value of two-photon absorption (2PA) cross section for these molecules. Two-photon excitation anisotropy was nearly constant over the spectral region investigated (in contrast to one-photon excitation anisotropy spectra) and can be roughly explained by a simple model of 2PA based on the single intermediate state approximation. For comparison, the same trend in two-photon excitation anisotropy was observed for Rhodamine B inglycerol.
AB - The steady-state excitation anisotropy spectra of fluorene derivatives were measured in viscous solvents, under the one- and two-photon excitation, over a broad spectral range (UV-Visible). The orientation of their absorption transition moments for the first, S 0→S 1, and second, S 0→S 2, excited states were determined. It was shown experimentally that a decrease in the angle between S 0→S 1and S 0→S 2 transitions corresponded to an increased value of two-photon absorption (2PA) cross section for these molecules. Two-photon excitation anisotropy was nearly constant over the spectral region investigated (in contrast to one-photon excitation anisotropy spectra) and can be roughly explained by a simple model of 2PA based on the single intermediate state approximation. For comparison, the same trend in two-photon excitation anisotropy was observed for Rhodamine B inglycerol.
KW - Fluorene derivatives
KW - Steady-state fluorescence
KW - Transition dipole moments
KW - Two-photon excitation anisotropy
UR - https://www.scopus.com/pages/publications/17444385289
UR - https://www.scopus.com/pages/publications/17444385289#tab=citedBy
U2 - 10.1007/s10895-005-0207-9
DO - 10.1007/s10895-005-0207-9
M3 - Article
C2 - 15711871
AN - SCOPUS:17444385289
SN - 1053-0509
VL - 15
SP - 3
EP - 11
JO - Journal of Fluorescence
JF - Journal of Fluorescence
IS - 1
ER -