State-resolved collisional relaxation of highly vibrationally excited pyridine by CO2: Influence of a permanent dipole moment

1998 ◽  
Vol 108 (15) ◽  
pp. 6185-6196 ◽  
Author(s):  
Mark C. Wall ◽  
Brian A. Stewart ◽  
Amy S. Mullin
Keyword(s):  
Dipole Moment ◽  
Permanent Dipole Moment ◽  
Collisional Relaxation ◽  
Vibrationally Excited

scholarly journals The Microwave Spectrum of 3,4-Dihydro-1,2-Pyran

1985 ◽  
Vol 40 (9) ◽  
pp. 913-919
Author(s):  
Juan Carlos López ◽  
José L. Alonso
Keyword(s):  
Dipole Moment ◽  
Excited States ◽  
Ground State ◽  
Principal Axis ◽  
Microwave Spectrum ◽  
Average Intensity ◽  
Ring Conformation ◽  
Vibrationally Excited ◽  
Rotational Constants ◽  
Displacement Measurements

Abstract The rotational transitions of 3,4-dihydro-1,2-pyran in the ground state and six vibrationally excited states have been assigned. The rotational constants for the ground state (A = 5198.1847(24), B = 4747.8716(24) and C = 2710.9161(24) have been derived by fitting μa, μb and μc-type transitions. The dipole moment was determined from Stark displacement measurements to be 1.400(8) D with its principal axis components |μa| =1.240(2), |μb| = 0.588(10) and |μc| = 0.278(8) D. A model calculation to reproduce the ground state rotational constants indicates that the data are consistent with a twisted ring conformation. The average intensity ratio gives vibrational separations between the ground and excited states of the ring-bending and ring-twisting modes of ~ 178 and ~ 277 cm-1 respectively.

The permanent dipole moment of ScF

1991 ◽  
Vol 176 (3-4) ◽  
pp. 303-308 ◽  
Author(s):  
Benoit Simard ◽  
Michael Vasseur ◽  
Peter A. Hackett
Keyword(s):  
Dipole Moment ◽  
Permanent Dipole Moment

scholarly journals The Role of Polarizabilities in the Fluorescence Behaviour of 4-cyano-N,N-dimethylaniline

1981 ◽  
Vol 36 (8) ◽  
pp. 868-875 ◽  
Author(s):  
Wolfram Baumann
Keyword(s):  
Dipole Moment ◽  
Electric Field ◽  
External Electric Field ◽  
Ground State ◽  
Permanent Dipole Moment ◽  
Reaction Field

Abstract The effect of an external electric field on the absorption and the double fluorescence of 4-cyano-N,N-dimethylaniline can be understood, taking into account reaction field induced polarizability effects. If a TICT state conformation emits the a-fiuorescence in dioxane, the permanent dipole moment in this state is only slightly larger than in the equilibrium ground state.

A time domain photoacoustic study of the collisional relaxation of vibrationally excited H2

1988 ◽  
Vol 124 (3) ◽  
pp. 359-369 ◽  
Author(s):  
Thomas G. Kreutz ◽  
Jack Gelfand ◽  
Richard B. Miles ◽  
Herschel Rabitz
Keyword(s):  
Time Domain ◽  
Collisional Relaxation ◽  
Vibrationally Excited

Investigation of the Stark Shift of the Benzene-d1 101 — 000 Rotational Transition by Microwave Fourier Transform Spectroscopy

1987 ◽  
Vol 42 (1) ◽  
pp. 72-78 ◽  
Author(s):  
Eckhard Fliege ◽  
Helmut Dreizler
Keyword(s):  
Fourier Transform ◽  
Dipole Moment ◽  
Absorption Coefficient ◽  
Rotational Transition ◽  
Stark Shift ◽  
Permanent Dipole Moment ◽  
Fourier Transform Spectrometer ◽  
Deuterium Substitution ◽  
Set Up ◽  
Sample Pressure

The Stark shift of the J'K′_K′+ - J″K_K″+ = 101 - 000 transition of benzene-d1 was investigated to determine the dipole moment caused by deuterium substitution. A modified set-up of the microwave Fourier transform spectrometer was used to be able to apply the necessary Stark voltage and to increase the sensitivity of the instrument. The resulting permanent dipole moment is μa = 0.00810(28) D corresponding to an absorption coefficient of ymax = 2.8 • 10-12 cm-1 , determined at a sample pressure of 1.5 mTorr, for that line.

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