scholarly journals Dipole Moment and Infrared Spectrum of 2,3,5,6-Tetraisopropylnitrobenzene

1961 ◽  
Vol 34 (11) ◽  
pp. 1740-1741 ◽  
Author(s):  
Ruka Nakashima ◽  
Setsuo Watarai ◽  
Toshio Kinugasa
Keyword(s):  
Dipole Moment ◽  
Infrared Spectrum

scholarly journals A Study on the Transversal Optical Mode in Amorphous Gallium Arsenide

1998 ◽  
Vol 21 (3) ◽  
pp. 209-211
Author(s):  
M. A. Grado-Caffaro ◽  
M. Grado-Caffaro
Keyword(s):  
Gallium Arsenide ◽  
Dipole Moment ◽  
Matrix Element ◽  
Infrared Spectrum ◽  
Far Infrared ◽  
Moment Matrix ◽  
Optical Mode ◽  
Structural Disorders

Contributions to the far-infrared spectrum corresponding to both dynamical and structural disorders in a-GaAs are examined when frequency coincides with the transversal optical mode. Under these circumstances, dipole moment matrix element is discussed.

Infrared Spectrum and Dipole Moment Function of Lithium Hydride

1960 ◽  
Vol 32 (3) ◽  
pp. 728-734 ◽  
Author(s):  
Thomas C. James ◽  
Wilfred G. Norris ◽  
William Klemperer
Keyword(s):  
Dipole Moment ◽  
Infrared Spectrum ◽  
Lithium Hydride ◽  
Moment Function

scholarly journals Dipole Moment and infrared Spectrum of 9-Nitroanthracene

1962 ◽  
Vol 83 (2) ◽  
pp. 226-227,A15 ◽  
Author(s):  
Kiyoshi NAKAMURA ◽  
Ruka NAKASHIMA
Keyword(s):  
Dipole Moment ◽  
Infrared Spectrum

scholarly journals The frequency-domain infrared spectrum of ammonia encodes changes in molecular dynamics caused by a DC electric field

2019 ◽  
Vol 116 (47) ◽  
pp. 23444-23447 ◽  
Author(s):  
Youngwook Park ◽  
Hani Kang ◽  
Robert W. Field ◽  
Heon Kang
Keyword(s):  
Molecular Dynamics ◽  
Dipole Moment ◽  
Infrared Spectrum ◽  
Electric Field ◽  
Frequency Domain ◽  
External Electric Field ◽  
Quantitative Characteristics ◽  
Dc Electric Field ◽  
Minimum Potential ◽  
Tunneling Dynamics

Ammonia is special. It is nonplanar, yet in v = 1 of the umbrella mode (ν2) its inversion motion is faster than J = 0↔1 rotation. Does the simplicity of the Chemist's concept of an electric dipole moment survive the competition between rotation, inversion, and a strong external electric field? NH3 is a favorite pedagogical example of tunneling in a symmetric double-minimum potential. Tunneling is a dynamical concept, yet the quantitative characteristics of tunneling are expressed in a static, eigenstate-resolved spectrum. The inverting-umbrella tunneling motion in ammonia is both large amplitude and profoundly affected by an external electric field. We report how a uniquely strong (up to 108 V/m) direct current (DC) electric field causes a richly detailed sequence of reversible changes in the frequency-domain infrared spectrum (the v = 0→1 transition in the ν2 umbrella mode) of ammonia, freely rotating in a 10 K Ar matrix. Although the spectrum is static, encoded in it is the complete inter- and intramolecular picture of tunneling dynamics.

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