Topic
Fourier transform spectroscopy
About: Fourier transform spectroscopy is a research topic. Over the lifetime, 5418 publications have been published within this topic receiving 134133 citations.
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15 Aug 2006
TL;DR: In this paper, a brief introduction to the theory of vibrational spectroscopy is given in this chapter, and the factors governing the shapes and widths of lines in vapor-phase and condensed-phase spectra are discussed.
Abstract: A brief introduction to the theory of vibrational spectroscopy is given in this chapter. Molecular vibrations are first described in terms of the harmonic oscillator. The Morse potential energy diagram and the concept of anharmonicity are then introduced. The way in which Raman spectra are generated is described in the third section of the article. The factors governing band intensities in infrared and Raman spectra are discussed. In the next section, vibration–rotation spectra of gases are introduced. Then the factors governing the shapes and widths of lines in vapor–phase and condensed-phase spectra are discussed. In the section on quantitative considerations, Beer's law is described and parameters such as absorptivity, linear absorption coefficient and the optical constants, refractive index, and index of absorption are defined. Finally, a brief introduction to the polarization of radiation is given.
Keywords:
vibrational spectroscopy;
vibrational quantum number;
infrared spectroscopy;
Fourier transform spectroscopy;
FT-IR spectrometers;
Raman spectroscopy;
near-infrared spectroscopy;
Fourier transform Raman;
CCD Raman;
bandwidths;
anharmonicity;
anharmonicity constant;
vibration–rotation spectra;
rotational quantum number;
centrifugal distortion;
band shapes;
Doppler broadening;
collision broadening;
absorptivity;
linear absorption coefficient;
refractive index;
index of absorption;
polarization
63 citations
TL;DR: Laser ablation in combination with molecular beam Fourier transform microwave spectroscopy has been used to establish unambiguously the presence of the diketo form of thymine in the gas phase and to obtain its structure.
Abstract: Laser ablation in combination with molecular beam Fourier transform microwave spectroscopy has been used to establish unambiguously the presence of the diketo form of thymine in the gas phase and to obtain its structure.
63 citations
62 citations
TL;DR: In this article, a facile solvothermal process was used to prep rare-earth ion (Eu3+, Ce3+, Tb3+) particles with oval morphology without further heat treatment.
62 citations
TL;DR: In this paper, a principal component analysis (PCA) of the full set of samples suggested the use of more homogeneous sample sets and the results obtained for a homogeneous set improved the prediction ability of the procedure.
62 citations