C6− electronic relaxation dynamics probed via time-resolved photoelectron imaging

2004 ◽  
Vol 121 (8) ◽  
pp. 3515-3526 ◽  
Author(s):  
Arthur E. Bragg ◽  
Jan R. R. Verlet ◽  
Aster Kammrath ◽  
Daniel M. Neumark
Keyword(s):  
Electronic Relaxation ◽  
Relaxation Dynamics ◽  
Photoelectron Imaging ◽  
Time Resolved

Unraveling the electronic relaxation dynamics in photoexcited 2,4-difluoroaniline via femtosecond time-resolved photoelectron imaging

2018 ◽  
Vol 148 (14) ◽  
pp. 144311 ◽  
Author(s):  
Fengzi Ling ◽  
Shuai Li ◽  
Jie Wei ◽  
Kai Liu ◽  
Yanmei Wang ◽  
...  
Keyword(s):  
Electronic Relaxation ◽  
Relaxation Dynamics ◽  
Photoelectron Imaging ◽  
Time Resolved

Time-resolved intraband electronic relaxation dynamics of Hgn− clusters (n=7–13,15,18) excited at 1.0 eV

2005 ◽  
Vol 122 (5) ◽  
pp. 054314 ◽  
Author(s):  
Arthur E. Bragg ◽  
Jan R. R. Verlet ◽  
Aster Kammrath ◽  
Ori Cheshnovsky ◽  
Daniel M. Neumark
Keyword(s):  
Electronic Relaxation ◽  
Relaxation Dynamics ◽  
Time Resolved

Observation of multi-channel non-adiabatic dynamics in aniline derivatives using time-resolved photoelectron imaging

2016 ◽  
Vol 194 ◽  
pp. 185-208 ◽  
Author(s):  
Magdalena M. Zawadzki ◽  
Marco Candelaresi ◽  
Lisa Saalbach ◽  
Stuart W. Crane ◽  
Martin J. Paterson ◽  
...  
Keyword(s):  
Excited State ◽  
Angular Distributions ◽  
Relaxation Dynamics ◽  
Photoelectron Imaging ◽  
Time Resolved ◽  
Valence States ◽  
Ultimate Fate ◽  
Site Selective ◽  
Photoelectron Angular Distributions ◽  
Electronic Character

We present results from a recent time-resolved photoelectron imaging (TRPEI) study investigating the non-adiabatic relaxation dynamics of N,N-dimethylaniline (N,N-DMA) and 3,5-dimethylaniline (3,5-DMA) following excitation at 240 nm. Analysis of the experimental data is supported by ab initio coupled-cluster calculations evaluating excited state energies and the evolution of several excited state physical properties as a function of N–H/N–CH3 bond extension – a critical reaction coordinate. The use of site-selective methylation brings considerable new insight to the existing body of literature concerning photochemical dynamics in the related system aniline at similar excitation wavelengths. The present work also builds on our own previous investigations in the same species at 250 nm. The TRPEI method provides highly differential energy- and angle-resolved data and, in particular, the temporal evolution of the photoelectron angular distributions afforded by the imaging approach offers much of the new dynamical information. In particular, we see no clear evidence of the second excited 2ππ* state non-adiabatically coupling to the lower-lying S1(ππ*) state or the mixed Rydberg/valence S2(3s/πσ*) state. This, in turn, potentially raises some unresolved questions about the overall nature of the dynamics operating in these systems, especially in regard to the 2ππ* state's ultimate fate. More generally, the findings for the aromatic systems N,N-DMA and 3,5-DMA, taken along with our recent TRPEI results for several aliphatic amine species, highlight interesting questions about the nature of electronic character evolution in mixed Rydberg-valence states as a function of certain key bond extensions and the extent of system conjugation. We begin exploring these ideas computationally for a systematically varied series of tertiary amines.

scholarly journals Time-resolved photoelectron imaging of the isolated deprotonated nucleotides

2014 ◽  
Vol 5 (10) ◽  
pp. 3963-3975 ◽  
Author(s):  
Adam S. Chatterley ◽  
Christopher W. West ◽  
Vasilios G. Stavros ◽  
Jan R. R. Verlet
Keyword(s):  
Photoelectron Spectroscopy ◽  
Relaxation Dynamics ◽  
Photoelectron Imaging ◽  
Time Resolved

Time-resolved photoelectron spectroscopy of deprotonated nucleotides provides new insights into their relaxation dynamics.

scholarly journals The effects of symmetry and rigidity on non-adiabatic dynamics in tertiary amines: a time-resolved photoelectron velocity-map imaging study of the cage-amine ABCO

2016 ◽  
Vol 18 (14) ◽  
pp. 9715-9723 ◽  
Author(s):  
Liv B. Klein ◽  
Thorbjørn J. Morsing ◽  
Ruth A. Livingstone ◽  
Dave Townsend ◽  
Theis I. Sølling
Keyword(s):  
Imaging Study ◽  
Velocity Map Imaging ◽  
Tertiary Amines ◽  
Relaxation Dynamics ◽  
Photoelectron Imaging ◽  
Time Resolved ◽  
Adiabatic Dynamics

The non-adiabatic relaxation dynamics of the tertiary cage-amine azabicyclo[2.2.2]octane (ABCO) have been investigated following 3p Rydberg excitation at 201 nm using femtosecond time-resolved photoelectron imaging.

scholarly journals Using time-resolved photoelectron spectroscopy to unravel the electronic relaxation dynamics of photoexcited molecules

2018 ◽  
Vol 47 (2) ◽  
pp. 309-321 ◽  
Author(s):  
Helen H. Fielding ◽  
Graham A. Worth
Keyword(s):  
Quantum Chemistry ◽  
Gas Phase ◽  
Photoelectron Spectroscopy ◽  
Electronic Relaxation ◽  
Relaxation Dynamics ◽  
Time Resolved ◽  
Insight Into

Time-resolved photoelectron spectroscopy measurements combined with quantum chemistry and dynamics calculations allow unprecedented insight into the electronic relaxation mechanisms of photoexcited molecules in the gas-phase.

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