Publication details for Prof. Jan R.R. VerletHorke, D. A., Chatterley, A. S., Bull, J. N. & Verlet, J. R. R. (2015). Time-Resolved Photodetachment Anisotropy: Gas-Phase Rotational and Vibrational Dynamics of the Fluorescein Anion. The Journal of Physical Chemistry Letters 6(1): 189-194.
- Publication type: Journal Article
- ISSN/ISBN: 1948-7185 (online)
- DOI: 10.1021/jz5022526
- Keywords: Gas-phase anions, Ultrafast dynamics, Electron detachment, Anisotropy, Photoelectron spectroscopy, Fluorescein, Wavepacket dynamics, Rotational anisotropy.
- Further publication details on publisher web site
- Durham Research Online (DRO) - may include full text
Author(s) from Durham
The photoelectron signal of the singly deprotonated fluorescein anion is found to be highly dependent on the relative polarization between pump and probe pulses, and time-resolved photodetachment anisotropy (TR-PA) is developed as a probe of the rotational dynamics of the chromophore. The total photoelectron signal shows both rotational and vibrational wavepacket dynamics, and we demonstrate how TR-PA can readily disentangle these dynamical processes. TR-PA in fluorescein presents specific opportunities for its development as a probe for rotational dynamics in large biomolecules as fluorescein derivatives are commonly incorporated in complex biomolecules and have been used extensively in time-resolved fluorescence anisotropy measurements, to which TR-PA is a gas-phase analogue.