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The Brass Light Pipe: An Easy Way to Obtain Infrared Spectra of Liquid Films and Monolayers

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Abstract:

We describe a brass light pipe (LP) mounted in a cylindrical optical accessory for attenuated total reflection (ATR) that can be used to readily obtain the infrared spectra of liquids and monolayers. As examples, we show the LP spectra of isooctane, decane, dimethyl malonate, dodecanol, dodecanethiol, and acetic acid and compare them to those obtained by transmission as well as by ATR. In addition, we utilize a dodecanethiol monolayer spectrum to illustrate the sensitivity of the LP scheme.

Keywords: ATR; ATTENUATED TOTAL REFLECTION; INFRARED SPECTROSCOPY; LIGHT PIPE; LIQUID

Document Type: Miscellaneous

DOI: http://dx.doi.org/10.1366/000370206778061995

Affiliations: 1: Département de physique et Département de chimie–biologie, Université du Québec à Trois-Rivières, Trois-Rivières, QC, Canada, G9A 5H7 2: Avensys Lab, 247 rue Thibeau, Trois-Rivières, QC, Canada, G8Y 6X9

Publication date: August 1, 2006

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