Ultrafast coherent oscillations reveal a reactive mode in the ring-opening reaction of fulgides

The ultrafast ring-opening reaction of photochromic fulgides proceeds via conical intersections to the ground state isomers involving activation barriers in the excited state. The coherent oscillations observed in the femtosecond transient absorption signal of a methyl-substituted indolylfulgide wer...

Full description

Saved in:
Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2015-06, Vol.17 (21), p.14045-14053
Main Authors: Slavov, C, Bellakbil, N, Wahl, J, Mayer, K, Rück-Braun, K, Burghardt, I, Wachtveitl, J, Braun, M
Format: Article
Language:English
Subjects:
Coherence
Excitation
Femtosecond
Hydrocarbons, Aromatic - chemistry
Indoles - chemistry
Isomerism
Isomers
Light
Mathematical analysis
Methylation
Models, Molecular
Oscillations
Physical chemistry
Quantum chemistry
Quantum Theory
Succinic Anhydrides - chemistry
Time Factors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The ultrafast ring-opening reaction of photochromic fulgides proceeds via conical intersections to the ground state isomers involving activation barriers in the excited state. The coherent oscillations observed in the femtosecond transient absorption signal of a methyl-substituted indolylfulgide were analysed in the framework of vibrational wavepackets to expose a dominant low-frequency mode at ∼80 cm(-1). The quantum chemical calculations in the relaxed excited state geometry of this fulgide revealed that the experimentally observed vibrational normal mode has a dominant contribution to the relevant ring-opening reactive coordinate.
ISSN:1463-9076
1463-9084
DOI:10.1039/c5cp01878a