Sub-50 fs excited state dynamics of 6-chloroguanine upon deep ultraviolet excitation

2016 ◽  
Vol 18 (20) ◽  
pp. 13874-13887 ◽  
Author(s):  
Sayan Mondal ◽  
Mrinalini Puranik
Keyword(s):  
Excited State ◽  
Electronic State ◽  
Resonance Raman ◽  
Raman Intensity ◽  
Intensity Analysis ◽  
Excited State Dynamics ◽  
Ultraviolet Excitation ◽  
Structural Distortions ◽  
Deep Ultraviolet

Instantaneous structural distortions of 6-chloroguanine in Bb electronic state from resonance Raman intensity analysis.

scholarly journals Investigating the Environment-dependent Photophysics of Chlorine Dioxide With Resonance Raman Intensities

1999 ◽  
Vol 19 (1-4) ◽  
pp. 305-309
Author(s):  
Anthony P. Esposito ◽  
Catherine E. Foster ◽  
Philip J. Reid
Keyword(s):  
Excited State ◽  
Gas Phase ◽  
Chlorine Dioxide ◽  
Resonance Raman ◽  
Structural Evolution ◽  
Reaction Dynamics ◽  
Intensity Analysis ◽  
Normal Coordinates ◽  
Raman Intensities ◽  
Asymmetric Stretch

The condensed-phase excited-state reaction dynamics of chlorine dioxide are investigated using resonance Raman intensity analysis. Absolute Raman intensities are measured on resonance with the 2B2–2A2 electronic transition and used to establish the excited-state structural evolution which occurs on the 2A2 surface following photoexcitation. Analysis of the intensities demonstrates that excited-state relaxation occurs along all three normal coordinates; however, only modest evolution is observed along the asymmetric stretch. This limited relaxation stands in contrast to the extensive motion along this coordinate in the gas phase. It is proposed that the initial excited-state structural relaxation serves to define the symmetry of the reaction coordinate and thus the mechanism of Cl production following photolysis of OClO.

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