Abstract

Infrared spectra recorded of the same material at variable temperatures are shown to be useful in the making of vibrational assignments and in the elucidation of molecular structure. Functional groups such as OH, NH₂, and C=O in compounds whose spectra have been recorded in CS₂ solution exhibit group frequencies which shift with change in temperature. Both variable-temperature and solution-phase studies are shown to be helpful in establishing that a compound exists as rotational isomers. Temperature changes are shown to vary the rotational isomer concentrations. The effect of temperature on difference tones, Fermi resonance, and in the breakdown of the selection rules is also demonstrated.

Solvent Effects on Carbonyl Bands in Infrared Spectra*

Robert P. Bauman and Elinor Thomson
J. Opt. Soc. Am. 53(1) 202-203 (1963)

Dependence of Emission Spectra of Phosphors upon Activator Concentration and Temperature

Gorton R. Fonda
J. Opt. Soc. Am. 40(6) 347-352 (1950)

The Effect of Temperature upon the Spectral Sensitivity of Photographic Emulsions*

C. H. Evans
J. Opt. Soc. Am. 32(4) 214-218 (1942)

Instrumental Effects in Infrared Gas Spectra and Spectroscopic Temperature Measurements*

Harold J. Babrov
J. Opt. Soc. Am. 51(2) 171-174 (1961)

The Effect of Temperature and Exposure to X-Rays Upon Triboluminescence

Frances G. Wick
J. Opt. Soc. Am. 29(10) 407-412 (1939)