
TY  - JOUR
A1  - Sakurovs, R 
A1  - Ghiggino, KP 
T1  - Temperature dependence of tryptophan and tyrosine luminescence in poly(vinyl alcohol) films
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1981
VL  - 34
IS  - 7
SP  - 1367
EP  - 1372
KW  - 
UR  - https://doi.org/10.1071/CH9811367 
N2  - The temperature dependence of the fluorescence and phosphorescence from tyrosine and tryptophan in poly(vinyl alcohol) films has been studied over the temperature range 90-295 K. A kinetic scheme is proposed which allows the calculation of activation energies for excited singlet and triplet state deactivation processes. A single temperature-dependent radiationless process from the singlet state is observed for tyrosine and tryptophan, with activation energies of 5.2±0.4 and 7.1±0.6 kJ mol-1 respectively. However, two distinct temperature transitions have been detected for triplet-state relaxation at 180 and 255 K. The role of polymer phase transitions in determining excited state relaxation pathways of embedded luminescent probes is discussed. 
ER  -

