Abstract

Temperature and time changes of infrared spectra may be used for studies of kinetic processes. Since the measurements often require low temperatures within a wide temperature interval and the compounds used are subjected to rapid cooling, special infrared cells must be used in these cases. The requirements for such cells are to a certain extent satisfied by an infrared cell which may be used without entrance and exit optical windows and where a stream of cooling nitrogen vapor prevents atmospheric water vapor from condensing on the cooled cell. The simple design of this cell makes possible a rapid cooling of the sample either by immersing it into liquid nitrogen or by spraying the sample on a precooled disc. Such a cell was used for the measurement of the activation energy of the conformational transition in chlorocyclohexane. However, the cell cannot be used below — 150°C because below this temperature condensation of carbon dioxide on the sample pellets of the cell takes place.

Variable-Temperature Infrared Cells

A. W. Baker
Appl. Opt. 4(3) 321-324 (1965)

Variable-temperature 3-m absorption cell developed for spectroscopic measurements of gases

Roland Schermaul, J. W. Günter Seibert, Georg Ch. Mellau, and Manfred Winnewisser
Appl. Opt. 35(16) 2884-2890 (1996)

A Variable-Temperature Cell for Cary 14 Spectrophotometers

J. G. Koren, J. S. Brinen, and R. C. Hirt
Appl. Opt. 3(12) 1431-1433 (1964)

New Variable Thickness Infrared Cell and the Infrared Spectra of HF, DF, H₂O, and D₂O†

Richard M. Adams and J. J. Katz
J. Opt. Soc. Am. 46(10) 895-898 (1956)

Reflection and Transmission Infrared Cells for Use at Liquid Air Temperatures

L. F. H. Bovey
J. Opt. Soc. Am. 41(6) 381-384 (1951)