A time-resolved EPR study of one- and two-photon processes in the photochemical reactions of benzil

1989 ◽  
Vol 93 (11) ◽  
pp. 4411-4413 ◽  
Author(s):  
Masahiro Mukai ◽  
Seigo Yamauchi ◽  
Noboru Hirota
Keyword(s):  
Photochemical Reactions ◽  
Time Resolved ◽  
Two Photon

scholarly journals Time-resolved high-harmonic spectroscopy of ultrafast ring-opening of 1,3-cyclohexadiene

2019 ◽  
Vol 205 ◽  
pp. 09017
Author(s):  
Keisuke Kaneshima ◽  
Yuki Ninota ◽  
Taro Sekikawa
Keyword(s):  
Ring Opening ◽  
High Harmonic ◽  
Harmonic Signal ◽  
Photochemical Reactions ◽  
Photon Absorption ◽  
Nuclear Dynamics ◽  
Time Resolved ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Bond Rearrangement

We report, to the best of our knowledge, the first time-resolved high-harmonic spectroscopy (TR-HHS) study of a chemical bond rearrangement. We investigate the transient change of the high-harmonic signal from 1,3-cyclohexadiene (CHD), which undergoes ring-opening and isomerizes to 1,3,5-hexatriene (HT) upon photoexcitation. By associating the variation in the harmonic yield to the changes in the electronic state and vibrational frequencies of the molecule due to isomerization, we find that the CHD excited via two-photon absorption of 3.1 eV photons isomerizes to HT, i.e., ring-opening occurs, around 400 fs after the excitation. The present results demonstrate that TR-HHS, which can track both electronic and nuclear dynamics, is a powerful tool for studying ultrafast photochemical reactions.

Time-resolved two-photon photoemission at metal-dielectric interfaces

2005 ◽  
Vol 45 (1-2) ◽  
pp. 181-194 ◽  
Author(s):  
Wolfram Berthold ◽  
Ulrich Höfer
Keyword(s):  
Time Resolved ◽  
Two Photon ◽  
Dielectric Interfaces

Two-photon time-resolved optogalvanic signals of neon

2009 ◽  
Vol 282 (23) ◽  
pp. 4552-4555 ◽  
Author(s):  
R. Omidyan ◽  
H. Farrokhpour ◽  
M. Tabrizchi
Keyword(s):  
Time Resolved ◽  
Two Photon

scholarly journals Reactivity control of a photocatalytic system by changing the light intensity

2019 ◽  
Vol 10 (48) ◽  
pp. 11023-11029 ◽  
Author(s):  
Christoph Kerzig ◽  
Oliver S. Wenger
Keyword(s):  
Light Intensity ◽  
Reaction Mechanisms ◽  
Photochemical Reactions ◽  
Two Photon ◽  
Photocatalytic System

By using simple optics such as a lens, switching between one- and two-photon driven reaction mechanisms became feasible, which allows the control over the main products of photochemical reactions.

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