Publications

@article{Horke:J.Phys.Chem.Lett.6:189,

title = {Time-Resolved Photodetachment Anisotropy: Gas-Phase Rotational and Vibrational Dynamics of the Fluorescein Anion},

author = {Daniel A Horke and Adam S Chatterley and James N Bull and Jan R R Verlet},

url = {http://pubs.acs.org/doi/abs/10.1021/jz5022526},

doi = {10.1021/jz5022526},

year  = {2015},

date = {2015-01-01},

journal = {J. Phys. Chem. Lett.},

volume = {6},

number = {1},

pages = {189--194},

abstract = {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.},

keywords = {alignment, Anion spectroscopy, photoelectron imaging, Photoelectron spectroscopy, velocity-map imaging},

pubstate = {published},

tppubtype = {article}

}

@article{Horke:J.Phys.Chem.Lett.3:834,

title = {Femtosecond Photoelectron Imaging of Aligned Polyanions: Probing Molecular Dynamics through the Electron\textendashAnion Coulomb Repulsion},

author = {Daniel. A. Horke and Adam S. Chatterley and Jan R. R. Verlet},

url = {https://doi.org/10.1021/jz3000933},

doi = {10.1021/jz3000933},

issn = {1948-7185},

year  = {2012},

date = {2012-04-01},

urldate = {2019-04-03},

journal = {J. Phys. Chem. Lett.},

volume = {3},

number = {7},

pages = {834--838},

abstract = {The first time-resolved photoelectron imaging study of a polyanion is presented. Using the alignment induced through resonance excitation, the photoelectron angular distributions can be qualitatively understood in terms of the position of localized excess charges on the molecular skeleton, which influence the photoemission dynamics. Pump\textendash probe experiments are used to demonstrate that the photoelectron angular distribution is also sensitive to molecular dynamics. This is shown here for the rotational dynamics of a polyanion, in which the photoelectron anisotropy tracks the rotational coherence as it dephases. The methodology can in principle be applied to general molecular dynamics in large polyanions, providing a new route to studying ultrafast structural dynamics in complex gas-phase systems.},

keywords = {alignment, Anion spectroscopy, photoelectron imaging, Photoelectron spectroscopy, velocity-map imaging},

pubstate = {published},

tppubtype = {article}

}