TY - JOUR
T1 - Excited-state relation dynamics of a PYP chromophore model in solution
T2 - Influence of the thioester group
AU - Changenet-Barret, Pascale
AU - Espagne, Agathe
AU - Katsonis, Nathalie
AU - Charier, Sandrine
AU - Baudin, Jean Bernard
AU - Jullien, Ludovic
AU - Plaza, Pascal
AU - Martin, Monique M.
PY - 2002/10/15
Y1 - 2002/10/15
N2 - Cis-trans photoisomerization of a photoactive yellow protein chromophore model, the deprotonated trans S-phenyl thio-p-hydroxycinnamate, is studied in aqueous solution by subpicosecond transient absorption and gain spectroscopy. The excited-state deactivation is found to involve the formation, in 1.7 ps, of an intermediate state which decays in 2.8 ps. A persistent bleaching signal is observed at longer times indicating that the excited state not only relaxes to the ground state but also partly forms a stable photoproduct, possibly the cis isomer. This behavior is analogous to that of the native photoactive yellow protein.
AB - Cis-trans photoisomerization of a photoactive yellow protein chromophore model, the deprotonated trans S-phenyl thio-p-hydroxycinnamate, is studied in aqueous solution by subpicosecond transient absorption and gain spectroscopy. The excited-state deactivation is found to involve the formation, in 1.7 ps, of an intermediate state which decays in 2.8 ps. A persistent bleaching signal is observed at longer times indicating that the excited state not only relaxes to the ground state but also partly forms a stable photoproduct, possibly the cis isomer. This behavior is analogous to that of the native photoactive yellow protein.
UR - http://www.scopus.com/inward/record.url?scp=0037109026&partnerID=8YFLogxK
U2 - 10.1016/S0009-2614(02)01480-X
DO - 10.1016/S0009-2614(02)01480-X
M3 - Article
AN - SCOPUS:0037109026
SN - 0009-2614
VL - 365
SP - 285
EP - 291
JO - Chemical physics letters
JF - Chemical physics letters
IS - 3-4
ER -