scholarly journals Ultrafast Relaxation Dynamics Observed Through Time-Resolved Photoelectron Angular Distributions†

2010 ◽  
Vol 114 (42) ◽  
pp. 11216-11224 ◽  
Author(s):  
Julien Lecointre ◽  
Gareth M. Roberts ◽  
Daniel A. Horke ◽  
Jan R. R. Verlet
Keyword(s):  
Angular Distributions ◽  
Relaxation Dynamics ◽  
Time Resolved ◽  
Ultrafast Relaxation ◽  
Photoelectron Angular Distributions

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.

Ultrafast relaxation investigated by Photoelectron Circular Dichroism : an isomeric comparison of Camphor and Fenchone

2021 ◽  
Author(s):  
Valérie Blanchet ◽  
Dominique Descamps ◽  
stephane Petit ◽  
Yann Mairesse ◽  
bernard Pons ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Imaging Technique ◽  
Velocity Map Imaging ◽  
Relaxation Dynamics ◽  
Time Resolved ◽  
Pump Probe ◽  
Ultrafast Relaxation ◽  
Circular Dichroïsm ◽  
Isomeric Effects

We study isomeric effects using time resolved photoelectron circular dichroism (PECD). By a (1+1’)pump-probe ionisation with photoelectron collected by velocity map imaging technique, we compare relaxation dynamics from the 3s-Rydberg...

Ultrafast relaxation dynamics of electronically excited piperidine: ionization signatures of Rydberg/valence evolution

2016 ◽  
Vol 18 (36) ◽  
pp. 25070-25079 ◽  
Author(s):  
Liv B. Klein ◽  
James O. F. Thompson ◽  
Stuart W. Crane ◽  
Lisa Saalbach ◽  
Theis I. Sølling ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Valence State ◽  
Aliphatic Amine ◽  
Relaxation Dynamics ◽  
Time Resolved ◽  
Ultrafast Relaxation ◽  
Secondary Aliphatic Amine ◽  
State Evolution ◽  
Electronically Excited

Time-resolved photoelectron spectroscopy reveals distinct ionization signatures of Rydberg-to-valence state evolution in the secondary aliphatic amine piperidine.

Ultrafast Relaxation Dynamics in trans-1,3-Butadiene Studied by Time-Resolved Photoelectron Spectroscopy with High Harmonic Pulses

2014 ◽  
Vol 5 (10) ◽  
pp. 1760-1765 ◽  
Author(s):  
Ayumu Makida ◽  
Hironori Igarashi ◽  
Takehisa Fujiwara ◽  
Taro Sekikawa ◽  
Yu Harabuchi ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
High Harmonic ◽  
Relaxation Dynamics ◽  
Time Resolved ◽  
Ultrafast Relaxation ◽  
In Trans

scholarly journals Femtosecond Time-Resolved Photoelectron Angular Distributions Probed during Photodissociation ofNO2

2000 ◽  
Vol 84 (26) ◽  
pp. 5983-5986 ◽  
Author(s):  
J. A. Davies ◽  
R. E. Continetti ◽  
D. W. Chandler ◽  
C. C. Hayden
Keyword(s):  
Angular Distributions ◽  
Time Resolved ◽  
Photoelectron Angular Distributions

scholarly journals Time-resolved photoelectron angular distributions from nonadiabatically aligned CO2 molecules with SX-FEL at SACLA

2018 ◽  
Vol 2 (11) ◽  
pp. 115015
Author(s):  
Shinichirou Minemoto ◽  
Hiroyuki Shimada ◽  
Kazma Komatsu ◽  
Wataru Komatsubara ◽  
Takuya Majima ◽  
...  
Keyword(s):  
Angular Distributions ◽  
Time Resolved ◽  
Photoelectron Angular Distributions

Ultrafast Relaxation Dynamics of a Keto-Carotenoid, Siphonaxanthin, Probed by Time-Resolved Fluorescence

2008 ◽  
pp. 319-322
Author(s):  
Seiji Akimoto ◽  
Makio Yokono ◽  
Michiya Higuchi ◽  
Akio Murakami ◽  
Shinichi Takaichi ◽  
...  
Keyword(s):  
Relaxation Dynamics ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Ultrafast Relaxation
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