Increasing the efficiency of the ring-opening reaction of photochromic indolylfulgides by optical pre-excitation.
For three indolylfulgides the quantum efficiency of the ring-opening reaction upon pre-excitation is investigated in a multipulse experiment. The quantum efficiency grows by factor of up to 3.4, when the pre-excitation pulse immediately precedes the excitation process. The change in quantum efficiency after pre-excitation is discussed as a function of reaction time, steady-state quantum efficiency and energetic barriers in the excited electronic state. The observed differences can be explained by the molecular properties of the investigated indolylfulgides.
BioMolekulare Optik, Fakultät für Physik, Ludwig-Maximilians-Universität München and Center For Integrated Protein Science Munich (CIPSM), Oettingenstr. 67, D-80538 München, Germany.
Thomas
T
Brust
Simone
S
Draxler
Jonas
J
Eicher
Watson J
WJ
Lees
Karola
K
Rück-Braun
Wolfgang
W
Zinth
Markus
M
Braun