Optically Induced Electron Transfer in Mixed-Valence States: A Model Study on Electronic Transitions, Relaxation Dynamics, and Transient Absorption Spectroscopy

2019 ◽  
Vol 123 (26) ◽  
pp. 5463-5471 ◽  
Author(s):  
Fabian Glaab ◽  
Johannes G. Wehner ◽  
Christoph Lambert ◽  
Volker Engel
Keyword(s):  
Electron Transfer ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Mixed Valence ◽  
Transient Absorption Spectroscopy ◽  
Electronic Transitions ◽  
Relaxation Dynamics ◽  
Model Study ◽  
Valence States ◽  
Optically Induced

Transient Absorption Spectroscopy of the Electron Transfer Step in the Photochemically Activated Polymerizations of N-ethylcarbazole and 9-phenylcarbazole.

2021 ◽  
Author(s):  
Georgia Thornton ◽  
Ryan Phelps ◽  
Andrew Orr-Ewing
Keyword(s):  
Electron Transfer ◽  
Radical Cation ◽  
Absorption Spectroscopy ◽  
Electron Acceptor ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Transfer Step

The polymerization of photoexcited N-ethylcarbazole (N-EC) in the presence of an electron acceptor begins with an electron transfer (ET) step to generate a radical cation of N-EC (N-EC+.). Here, the...

scholarly journals Symmetry of molecular Rydberg states revealed by XUV transient absorption spectroscopy

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Peng Peng ◽  
Claude Marceau ◽  
Marius Hervé ◽  
P. B. Corkum ◽  
A. Yu. Naumov ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Extreme Ultraviolet ◽  
Rydberg States ◽  
Transient Absorption Spectroscopy ◽  
Electronic Transitions ◽  
Final States ◽  
Polarization Direction ◽  
Quasibound State

AbstractTransient absorption spectroscopy is utilized extensively for measurements of bound- and quasibound-state dynamics of atoms and molecules. The extension of this technique into the extreme ultraviolet (XUV) region with attosecond pulses has the potential to attain unprecedented time resolution. Here we apply this technique to aligned-in-space molecules. The XUV pulses are much shorter than the time during which the molecules remain aligned, typically $$<$$<100 fs. However, transient absorption is not an instantaneous probe, because long-lived coherences re-emit for picoseconds to nanoseconds. Due to dephasing of the rotational wavepacket, it is not clear if these coherences will be evident in the absorption spectrum, and whether the properties of the initial excitations will be preserved. We studied Rydberg states of N$${}_{2}$$2 and O$${}_{2}$$2 from 12 to 23 eV. We were able to determine the polarization direction of the electronic transitions, and hence identify the symmetry of the final states.

scholarly journals Interaction of light with a non-covalent zinc porphyrin–graphene oxide nanohybrid

2020 ◽  
Vol 22 (24) ◽  
pp. 13456-13466
Author(s):  
Ewelina Gacka ◽  
Gotard Burdzinski ◽  
Bronisław Marciniak ◽  
Adam Kubas ◽  
Anna Lewandowska-Andralojc
Keyword(s):  
Electron Transfer ◽  
Graphene Oxide ◽  
Absorption Spectroscopy ◽  
Fast Electron ◽  
Transient Absorption ◽  
Singlet State ◽  
Transient Absorption Spectroscopy ◽  
Time Resolved ◽  
Zinc Porphyrin

Fast electron transfer from the photoexcited ZnTPPH singlet state to GO sheets was detected by ultrafast time-resolved transient absorption spectroscopy.

scholarly journals Carrier relaxation dynamics in defect states of epitaxial GaN/AlN/Si using ultrafast transient absorption spectroscopy

RSC Advances ◽  
2015 ◽  
Vol 5 (102) ◽  
pp. 83969-83975 ◽  
Author(s):  
Palak Dugar ◽  
Mahesh Kumar ◽  
Shibin Krishna T. C. ◽  
Neha Aggarwal ◽  
Govind Gupta
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Relaxation Dynamics ◽  
Defect States ◽  
Carrier Relaxation ◽  
Ultrafast Transient Absorption ◽  
Defect Levels ◽  
Carrier Relaxation Dynamics ◽  
Ultrafast Transient Absorption Spectroscopy

Carrier relaxation dynamics through the defect levels in an epitaxial GaN/AlN/Si have been analysed on the femto–picosecond timescale, using ultrafast-transient absorption spectroscopy.

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