Vibrational Relaxation Dynamics oftrans-Stilbene in the Lowest Excited Singlet State. Pump and Probe Wavelength Dependencies of the Picosecond Time-Resolved Anti-Stokes Raman Spectrum

1998 ◽  
Vol 102 (48) ◽  
pp. 9686-9695 ◽  
Author(s):  
Takakazu Nakabayashi ◽  
Hiromi Okamoto ◽  
Mitsuo Tasumi
Keyword(s):  
Raman Spectrum ◽  
Vibrational Relaxation ◽  
Singlet State ◽  
Excited Singlet State ◽  
Relaxation Dynamics ◽  
Excited Singlet ◽  
Time Resolved ◽  
Probe Wavelength ◽  
Pump And Probe ◽  
Anti Stokes

scholarly journals Pump- And Probe-Wavelength Dependencies of Picosecond Anti-Stokes Raman Spectrum of Trans-Stilbene in the S1 State

1999 ◽  
Vol 19 (1-4) ◽  
pp. 75-78 ◽  
Author(s):  
Takakazu Nakabayashi ◽  
Hiromi Okamoto ◽  
Mitsuo Tasumi
Keyword(s):  
Vibrational Relaxation ◽  
Vibrational Energy ◽  
Wavelength Dependence ◽  
Relaxation Dynamics ◽  
Vibrationally Excited ◽  
Time Resolved ◽  
Probe Wavelength ◽  
Trans Stilbene ◽  
Pump And Probe ◽  
Anti Stokes

Vibrational relaxation dynamics of trans-stilbene in the S1 state immediately after photoexcitation is studied by picosecond time-resolved anti-Stokes Raman spectroscopy with several pump and probe wavelengths. Pump-wavelength dependence of the anti- Stokes spectrum indicates that, when pump photons with high excess energy (≈5200cm-1) are used, the anti-Stokes Raman bands at 0 ps delay time arise from vibrationally excited transients with excess vibrational energy not thermally distributed in the molecule. Probe-wavelength dependence suggests that the vibrationally excited transients at 0 ps are mostly on the lowest excited vibrational levels, as far as the olefinic C═C stretching and the C–Ph stretching modes are concerned. The vibrational relaxation process of S1trans-stilbene is discussed on the basis of the observed results.

Transient absorption and vibrational relaxation dynamics of the lowest excited singlet state of pyrene in solution

1995 ◽  
Vol 99 (19) ◽  
pp. 7439-7445 ◽  
Author(s):  
Paolo Foggi ◽  
Luca Pettini ◽  
Imre Santa ◽  
Roberto Righini ◽  
Salvatore Califano
Keyword(s):  
Vibrational Relaxation ◽  
Transient Absorption ◽  
Singlet State ◽  
Excited Singlet State ◽  
Relaxation Dynamics ◽  
Excited Singlet

Role of Excited Singlet State in the Photooxidation of Carotenoids:  A Time-Resolved Q-Band EPR Study

1996 ◽  
Vol 100 (2) ◽  
pp. 669-671 ◽  
Author(s):  
A. S. Jeevarajan ◽  
L. D. Kispert ◽  
N. I. Avdievich ◽  
M. D. E. Forbes
Keyword(s):  
Singlet State ◽  
Excited Singlet State ◽  
Excited Singlet ◽  
Time Resolved

scholarly journals Two Distinct Solvated Structures of Para-Nitroaniline in Acetonitrile and Their Dissociation and Reassociation Dynamics

1999 ◽  
Vol 19 (1-4) ◽  
pp. 329-333 ◽  
Author(s):  
K. Mohanalingam ◽  
S. Yamaguchi ◽  
H. Hamaguchi
Keyword(s):  
Singular Value Decomposition ◽  
Absorption Spectra ◽  
Time Constant ◽  
Singlet State ◽  
Temporal Evolution ◽  
Singular Value ◽  
Excited Singlet State ◽  
Excited Singlet ◽  
Time Resolved ◽  
Value Decomposition

We have measured the femtosecond time-resolved absorption spectra of para-nitroaniline in acetonitrile just after the photoexcitation to the lowest excited singlet state. The Singular Value Decomposition (SVD) analysis shows that two temporal evolutions follow the photoexcitation. The fast component (0.7 ps time constant) describes the dissociation of the 1:2 associated form to generate the 1:0 form followed by its reassociation with AN molecules. A slower temporal evolution of 10 ps is most likely to represent the cooling down process of the whole system.

Vibronic relaxation dynamics of o-dichlorobenzene in its lowest excited singlet state

2018 ◽  
Vol 692 ◽  
pp. 353-358
Author(s):  
Benkang Liu ◽  
Haiyan Zhao ◽  
Xiang Lin ◽  
Xinxin Li ◽  
Mengmeng Gao ◽  
...  
Keyword(s):  
Singlet State ◽  
Excited Singlet State ◽  
Relaxation Dynamics ◽  
Excited Singlet
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