The ring-opening channel and the influence of Rydberg states on the excited state dynamics of furan and its derivatives

2018 ◽  
Vol 149 (8) ◽  
pp. 084303 ◽  
Author(s):  
O. Schalk ◽  
T. Geng ◽  
T. Hansson ◽  
R. D. Thomas
Keyword(s):  
Excited State ◽  
Ring Opening ◽  
Rydberg States ◽  
Excited State Dynamics ◽  
Opening Channel

Symmetry controlled excited state dynamics

2019 ◽  
Vol 21 (5) ◽  
pp. 2283-2294 ◽  
Author(s):  
Max D. J. Waters ◽  
Anders B. Skov ◽  
Martin A. B. Larsen ◽  
Christian M. Clausen ◽  
Peter M. Weber ◽  
...  
Keyword(s):  
Excited State ◽  
Internal Conversion ◽  
Rydberg States ◽  
Aliphatic Amines ◽  
Velocity Map Imaging ◽  
Excited State Dynamics ◽  
Loss Of Coherence

Symmetry effects in internal conversion are studied by means of two isomeric cyclic tertiary aliphatic amines in a velocity map imaging (VMI) experiment on the femtosecond timescale. We conclude that lessening the symmetry of the molecule leads to loss of coherence after internal conversion between Rydberg states.

scholarly journals Ultrafast electrocyclic ring opening of 7-dehydrocholesterol in solution: The influence of solvent on excited state dynamics

2011 ◽  
Vol 134 (10) ◽  
pp. 104503 ◽  
Author(s):  
Kuo-Chun Tang ◽  
Aaron Rury ◽  
Michael B. Orozco ◽  
Joshua Egendorf ◽  
Kenneth G. Spears ◽  
...  
Keyword(s):  
Excited State ◽  
Ring Opening ◽  
Excited State Dynamics ◽  
Influence Of Solvent

Excited-State Dynamics in the RNA Nucleotide Uridine 5’-Monophosphate Investigated by Femtosecond Broadband Transient Absorption Spectroscopy

2019 ◽  
Author(s):  
Matthew M. Brister ◽  
Carlos Crespo-Hernández
Keyword(s):  
Excited State ◽  
Excited States ◽  
Ground State ◽  
Transient Absorption ◽  
Electronic Energy ◽  
Transient Absorption Spectroscopy ◽  
Electronic Relaxation ◽  
Vibrationally Excited ◽  
Excited State Dynamics ◽  
Π State

<p></p><p> Damage to RNA from ultraviolet radiation induce chemical modifications to the nucleobases. Unraveling the excited states involved in these reactions is essential, but investigations aimed at understanding the electronic-energy relaxation pathways of the RNA nucleotide uridine 5’-monophosphate (UMP) have not received enough attention. In this Letter, the excited-state dynamics of UMP is investigated in aqueous solution. Excitation at 267 nm results in a trifurcation event that leads to the simultaneous population of the vibrationally-excited ground state, a longlived <sup>1</sup>n<sub>O</sub>π* state, and a receiver triplet state within 200 fs. The receiver state internally convert to the long-lived <sup>3</sup>ππ* state in an ultrafast time scale. The results elucidate the electronic relaxation pathways and clarify earlier transient absorption experiments performed for uracil derivatives in solution. This mechanistic information is important because long-lived nπ* and ππ* excited states of both singlet and triplet multiplicities are thought to lead to the formation of harmful photoproducts.</p><p></p>

Modulation of Excited State Dynamics in Lead Halide Perovskite Films with Electrical Bias

2019 ◽  
Author(s):  
Gergely Samu ◽  
R.A. Scheidt ◽  
A. Balog ◽  
C. Janáky ◽  
P.V. Kamat
Keyword(s):  
Excited State ◽  
Excited State Dynamics ◽  
Halide Perovskite ◽  
Electrical Bias ◽  
Lead Halide

Femtosecond Spectroscopic Studies of the One- and Two-Photon Excited-State Dynamics of 2,2,17,17-Tetramethyloctadeca-5,9,13-trien-3,7,11,15-tetrayne:  A Trimeric Oligodiacetylene

2006 ◽  
Vol 110 (40) ◽  
pp. 11435-11439 ◽  
Author(s):  
Grzegorz M. Balkowski ◽  
Michiel Groeneveld ◽  
Hong Zhang ◽  
Cindy C. J. Hendrikx ◽  
Michael Polhuis ◽  
...  
Keyword(s):  
Excited State ◽  
Spectroscopic Studies ◽  
Excited State Dynamics ◽  
Two Photon ◽  
The One
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