TY - JOUR
T1 - Fluorescence Anisotropies of 4-Dimethylamino-a>- diphenylphosphinyl-fra/15-Styrene in Isotropic Media in the Case of One- and Two-Photon Excitation
AU - Kawski, A.
AU - Gryczynski, J.
AU - Gryczynski, Z.
N1 - Funding Information:
This work was supported by grant No 20283 91 01 from the Committee for Scientific Research (Warsaw) and performed partially at the Center for Fluorescence Spectroscopy, NSF DIR-8710401.
PY - 1993/4/1
Y1 - 1993/4/1
N2 - Fluorescence emission anisotropies, r, and mean lifetimes of 4-dimethylamino-a>diphenylphosphinyl-rrans-styrene (DDPS) were measured in n-butanol at different temperatures from 20 to 80 °C for one- and two-photon excitation. When increasing the temperature, the lifetime decreased from 32 to 12 ps, the r values, however, remained constant (0.315 and 0.445 for one- and two-photon excitation, respectively) and were found to be temperature independent. For DDPS in glycerol at — 5°C, where rotational diffusion does not occur during the excited state lifetime, the limiting emission anisotropies were r00ff{0 can be due to vibrations performed after excitation by the DDPS molecule as a result of the initial shock.
AB - Fluorescence emission anisotropies, r, and mean lifetimes of 4-dimethylamino-a>diphenylphosphinyl-rrans-styrene (DDPS) were measured in n-butanol at different temperatures from 20 to 80 °C for one- and two-photon excitation. When increasing the temperature, the lifetime decreased from 32 to 12 ps, the r values, however, remained constant (0.315 and 0.445 for one- and two-photon excitation, respectively) and were found to be temperature independent. For DDPS in glycerol at — 5°C, where rotational diffusion does not occur during the excited state lifetime, the limiting emission anisotropies were r00ff{0 can be due to vibrations performed after excitation by the DDPS molecule as a result of the initial shock.
UR - http://www.scopus.com/inward/record.url?scp=84943480039&partnerID=8YFLogxK
U2 - 10.1515/zna-1993-0402
DO - 10.1515/zna-1993-0402
M3 - Article
AN - SCOPUS:84943480039
SN - 0932-0784
VL - 48
SP - 551
EP - 556
JO - Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences
JF - Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences
IS - 4
ER -