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.
Brust
Thomas
T
BioMolekulare Optik, Fakultät für Physik, Ludwig-Maximilians-Universität München and Center For Integrated Protein Science Munich (CIPSM), Oettingenstr. 67, D-80538 München, Germany.
Draxler
Simone
S
Eicher
Jonas
J
Lees
Watson J
WJ
Rück-Braun
Karola
K
Zinth
Wolfgang
W
Braun
Markus
M