A great deal of research has been conducted on the infrared spectra of pure molecules at low temperatures. Only a limited amount of information can be acquired on molecules in the liquid, amorphous, and crystalline states. The theories describing the liquid and amorphous states are
not yet completely adequate, whereas the theories describing the gaseous and crystalline states appear to be well established. The value of lowering the temperature of molecules appears to be that of simplifying their spectra by increasing the order of the system.
Midwest Research Institute, Kansas City, Missouri 64110
Publication date: September 1, 1969
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The Society publishes the internationally recognized, peer reviewed journal, Applied Spectroscopy, which is available both in print and online. Subscriptions are included with membership or can be purchased by institutional or corporate organizations. Abstracts may be viewed free of charge. Previously published as Bulletin (Society for Applied Spectroscopy)