Related Experiment Video
Updated: Apr 12, 2026

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
Ultrafast coherent oscillations reveal a reactive mode in the ring-opening reaction of fulgides
C Slavov1, N Bellakbil, J Wahl
1Institute of Physical and Theoretical Chemistry, Goethe University, Max-von-Laue-Str. 7, 60438 Frankfurt/Main, Germany. braun@theochem.uni-frankfurt.de.
Abstract:
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.
More Related Videos
09:57Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems
Published on: February 10, 2020
10:10Application of Elemental Lanthanides in the Selective C-F Activation of Trifluoromethylated Benzofulvenes Providing Access to Various Difluoroalkenes
Published on: July 28, 2018
Related Concept Videos
Acid-Catalyzed Ring-Opening of Epoxides
Cycloaddition Reactions: MO Requirements for Photochemical Activation
Base-Catalyzed Ring-Opening of Epoxides
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
Cycloaddition Reactions: MO Requirements for Thermal Activation
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation