scholarly journals Transient Absorption Spectra of Vibrationally Excited Water Molecule on Zeolite Surface

1999 ◽  
Vol 19 (1-4) ◽  
pp. 317-320
Author(s):  
Tatsuya Fujino ◽  
Akihide Wada ◽  
Satoru S. Kano ◽  
Kazunari Domen ◽  
Chiaki Hirose
Keyword(s):  
Water Molecule ◽  
Transient Absorption ◽  
Excited Level ◽  
Rapid Decay ◽  
Vibrationally Excited ◽  
Pump Probe ◽  
Zeolite Surface ◽  
Transient Absorption Spectra ◽  
Spectroscopic Feature ◽  
Hot Band

By means of infrared pump-probe technique, spectroscopic feature of vibrationally excited water molecule (D2O) on mordenite zeolite (OD) has been investigated. Populational lifetime of the OD stretching band (ν3:2730cm-1) was determined to be 43±5 ps at 123 K by the time evolution of hot band. The transient bleachings and absorptions appeared when the D2O molecule was promoted to the vibrationally excited level of the OD stretching modes. Especially, the transient absorption at 2680 cm-1 has rapid decay time (≈15 ps) and it was assigned as the overtone between ν3 mode and vibrationally excited ν1 mode (2620 cm-1).

Transient absorption spectra of vibrationally excited OH/OD groups in mordenite zeolites: Effect of Xe adsorption

1996 ◽  
Vol 105 (16) ◽  
pp. 6665-6672 ◽  
Author(s):  
M. Kashitani ◽  
T. Fujino ◽  
K. Fukuyama ◽  
J. Kubota ◽  
J. N. Kondo ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Transient Absorption ◽  
Vibrationally Excited ◽  
Transient Absorption Spectra

Testing the fate of nascent holes in CdSe Nanocrystals with sub 10 fs pump-probe spectroscopy

Nanoscale ◽  
2021 ◽  
Author(s):  
Jayanta Dana ◽  
Omer Haggag ◽  
Morin Mor ◽  
Joanna Dehnel ◽  
E Liftschitz ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Transient Absorption ◽  
Cdse Nanocrystals ◽  
Pump Probe ◽  
Light Emitting ◽  
Transient Absorption Spectra ◽  
Probe Spectroscopy ◽  
State Filling

Numerous studies have reported that transient absorption spectra in core CdSe nanocrystals do not register state filling in 1Sh, an absence which has profound consequences in light emitting applications. It...

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>

Kinetic-Model-Free Analysis of Transient Absorption Spectra Enabled by 2D Correlation Analysis

2021 ◽  
pp. 4148-4153
Author(s):  
Julian Hniopek ◽  
Carolin Müller ◽  
Thomas Bocklitz ◽  
Michael Schmitt ◽  
Benjamin Dietzek ◽  
...  
Keyword(s):  
Kinetic Model ◽  
Correlation Analysis ◽  
Absorption Spectra ◽  
Transient Absorption ◽  
Transient Absorption Spectra ◽  
Model Free ◽  
2D Correlation Analysis

Coherent pump–probe spectroscopy of a Λ system with a close lying excited level

2013 ◽  
Vol 88 (6) ◽  
pp. 065404 ◽  
Author(s):  
Niharika Singh ◽  
Ayan Ray ◽  
R D'Souza ◽  
Q V Lawande ◽  
B N Jagatap
Keyword(s):  
Excited Level ◽  
Pump Probe ◽  
Probe Spectroscopy
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