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Erschienen in:
2017 | OriginalPaper | Buchkapitel
1. Infrared Spectroscopy as a Vibrational Spectroscopy
verfasst von : Takeshi Hasegawa
Erschienen in: Quantitative Infrared Spectroscopy for Understanding of a Condensed Matter
Verlag: Springer Japan
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Abstract
Infrared (IR) spectroscopy is a physical science on molecular vibrations, with which the molecular characters can be discussed in detail. The molecular characters are represented by the molecular conformation, hydrogen bonding, crystallinity, and orientation as well as the primary chemical structure. If a vibration-excited molecule yields a single band, the spectral information would be too short to reveal the molecular structure. Fortunately, the molecular vibrations are decomposed into independent fundamental vibrations, which are called normal modes. In many cases, a normal mode is located on a chemical group in a nearly isolated manner. Thanks to this characteristic, IR spectroscopy is quite useful to discuss molecular structure with respect to each chemical group.