Results 131 to 140 of about 3,012,302 (181)
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Journal of Molecular Spectroscopy, 2018
The rotational spectrum of 1-phenyl-2,2,2-trifluoroethanol, a chiral organic alcohol, was investigated using two chirped pulse Fourier transform microwave spectrometers.
Colton D Carlson +5 more
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The rotational spectrum of 1-phenyl-2,2,2-trifluoroethanol, a chiral organic alcohol, was investigated using two chirped pulse Fourier transform microwave spectrometers.
Colton D Carlson +5 more
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1998
This chapter cites a gas phase sample that demonstrates molecules in continual motion, appropriate to its thermal energy. It describes the continual motion of the molecules as rotational energy, which is the kinetic energy associated with the tumbling motion of the molecules relative to an observer in the laboratory.
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This chapter cites a gas phase sample that demonstrates molecules in continual motion, appropriate to its thermal energy. It describes the continual motion of the molecules as rotational energy, which is the kinetic energy associated with the tumbling motion of the molecules relative to an observer in the laboratory.
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Vibration-Rotation Spectroscopy
Annual Review of Physical Chemistry, 1955Since the general background of vibration-rotation spectroscopy has quite recently been brought up to date in reviews of this series it seems possible to dispense with any general introduction to this subject. In this review it is proposed to indicate some present trends and to give a reasonably complete though not exhaustive account of recent ...
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SPIE Proceedings, 1990
This paper pertains to rotational coherence spectroscopy, a time-domain method of high resolution rotational spectroscopy based on the quantum beat phenomenon. We present a brief discussion of the theoretical basis of the method and a consideration of its advantages over spectral domain methods. We also present experimental results on two species - 1,2-
Peter M. Felker +3 more
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This paper pertains to rotational coherence spectroscopy, a time-domain method of high resolution rotational spectroscopy based on the quantum beat phenomenon. We present a brief discussion of the theoretical basis of the method and a consideration of its advantages over spectral domain methods. We also present experimental results on two species - 1,2-
Peter M. Felker +3 more
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Collisions and rotational spectroscopy
Journal of Molecular Spectroscopy, 1992Abstract Motivated by Oka's early work on molecular collisions and especially collision-induced rotational transitions, this paper addresses progress in these areas. Particular attention is paid to recent extensions to lower energy collisions of astrophysical significance and to questions about the relation between experimental observables and the ...
Thomas M. Goyette +3 more
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Photoacoustic rotational Raman spectroscopy
The Journal of the Acoustical Society of America, 1981A method and apparatus for spectroscopic material analysis are provided. Two coherent beams of monochromatic radiation are directed through a sample of material. A tuning mechanism adjusts the frequency difference between the radiation beams to equal substantially the rotational frequency of a preselected constituent of the material.
Joseph J. Barrett, Gary A. West
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Abstract This chapter starts with a discussion of classical rotation of rigid bodies and moments of inertia. Asymmetric, symmetric, and spherical tops are defined. Rotational energy levels of diatomic and linear molecules are derived, along with selection rules and spectra. Rotational energy levels of symmetric tops are derived including
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Rotational and vibrational spectroscopy
2015This chapter presents a brief introduction to rotational and vibrational spectroscopy. It explains how pure rotational spectroscopy can be used in the precise determination of molecular geometry in small molecules and provide a direct means to deduce the shape of larger molecules.
Simon Duckett +2 more
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Rotational spectroscopy and astrochemistry
Journal of Molecular Structure, 1995Abstract During the last 25 years, the close collaboration between laboratory spectrocopists and astrophysicists allowed the detection of about one hundred different molecular species in the interstellar medium, largely via their rotational emission spectra.
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Molecular Rotational Resonance Spectroscopy
Applied Spectroscopy, 1969A number of recent review articles have summarized the application of Molecular Rotational Resonance (MRR) spectroscopy to the area of molecular structure determinations and described how these applications have applied to chemistry. This article will briefly review this established area of MRR spectroscopy and describe two developments that offer the
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