Ultrafast structural dynamics of photochromic indolylfulgimides studied by vibrational spectroscopy and DFT calculations.
The structural dynamics of the ring-opening reaction in a photochromic indolylfulgimide, a reversible, ultrafast photoswitch, is investigated by ultra-broadband time-resolved vibrational spectroscopy. The experimentally observed vibrational modes of the indolylfulgimide photoisomers C and E are assigned to normal modes with the help of DFT calculations. A complete evaluation of the observed vibrational dynamics including excited-state vibrational modes is used to characterize the reaction path and the cooling behavior of the photoswitch.
Koller
Florian O
FO
BioMolekulare Optik, Department Physik, Ludwig-Maximilians-Universität München, Oettingenstrasse 67, D-80538 München, Germany.
Schreier
Wolfgang J
WJ
Schrader
Tobias E
TE
Sieg
Arne
A
Malkmus
Stephan
S
Schulz
Christine
C
Dietrich
Steffen
S
Rück-Braun
Karola
K
Zinth
Wolfgang
W
Braun
Markus
M
D000465:Algorithms; D007211:Indoles / Q000737:chemistry*; D007536:Isomerism; D015394:Molecular Structure; D010777:Photochemistry; D013056:Spectrophotometry, Ultraviolet; D013388:Succinimides / Q000737:chemistry*
D007211:Indoles; C517403:N-methylindolylfulgimide; D013388:Succinimides