Photodissociation and intramolecular dynamics of vibrationally excited CHF2Cl

2002 ◽  
Vol 116 (5) ◽  
pp. 1869-1876 ◽  
Author(s):  
Lianbin Li ◽  
Gabriela Dorfman ◽  
Aviva Melchior ◽  
Salman Rosenwaks ◽  
Ilana Bar
Keyword(s):  
Intramolecular Dynamics ◽  
Vibrationally Excited

Intramolecular Dynamics in the Photofragmentation of Initially Vibrationally Excited CH2Cl2†

2004 ◽  
Vol 108 (39) ◽  
pp. 8089-8095 ◽  
Author(s):  
Ran Marom ◽  
Amir Golan ◽  
Salman Rosenwaks ◽  
Ilana Bar
Keyword(s):  
Intramolecular Dynamics ◽  
Vibrationally Excited

Measurements of Vibrationally Excited Oxygen Produced in Recombining O-O2-Ar Mixtures

2021 ◽  
Author(s):  
Dirk C. van den Bekerom ◽  
Elijah Jans ◽  
Xin Yang ◽  
Anam C. Paul ◽  
Daniil Andrienko ◽  
...  
Keyword(s):  
Vibrationally Excited ◽  
Excited Oxygen

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>

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