Determination of optical constants and vibrational band intensities of liquids in the infrared using attenuated total reflexion

Abstract

The refractive index, and vibrational absorption band intensities, of some liquids have been determined by a new method involving attenuated total reflexion at a solid liquid interface. The principles of the method have been explained and the factors which determine a choice of optimal working conditions have been discussed. The method has been applied to absorp­tion bands of benzene, carbon tetrachloride, chloroform, bromoform,sym-tetrabromo-ethane, and carbon disulphide. Data have been obtained on the variation of refractive index across the absorption bands, and the computed band intensities have been compared with those obtained previously by other methods.