Optical constants of neat liquid-chemical warfare agents and related materials measured by infrared spectroscopic ellipsometry

C.S.-C. Yang; B. R. Williams; M. S. Hulet; T. E. Tiwald; R. W. Miles Jr.; A. C. Samuels

doi:10.1117/12.882067

3 June 2011 Optical constants of neat liquid-chemical warfare agents and related materials measured by infrared spectroscopic ellipsometry

C.S.-C. Yang, B. R. Williams, M. S. Hulet, T. E. Tiwald, R. W. Miles Jr., A. C. Samuels

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Proceedings Volume 8018, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII; 80180M (2011) https://doi.org/10.1117/12.882067
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

We studied various liquids using a vertical attenuated total reflection (ATR) liquid sampling assembly in conjunction with Infrared Variable Angle Spectroscopic Ellipsometry (IR-VASE), to determine the infrared optical constants of several bulk liquids related to chemical warfare. The index of refraction, n, and the extinction coefficient, k, of isopropyl methylphosphonofluoridate (Sarin or GB), isopropyl alcohol (IPA) (a precursor of GB), and dimethyl methylphosphonate (DMMP)-a commonly employed simulant for GB, measured by our vertical ATR IR-VASE setup are closely matched to those found in other studies. We also report the optical constants of cyclohexyl methylphosphonofluoridate (GF), 2-(diisopropylamino)ethyl methylphosphonothioate (VX), bis-(2-chloroethyl) sulfide (HD), and 2-chlorovinyl dichloroarsine (L, Lewisite). The ATR IR-VASE technique affords an accurate measurement of the optical constants of these hazardous compounds.

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C.S.-C. Yang, B. R. Williams, M. S. Hulet, T. E. Tiwald, R. W. Miles Jr., and A. C. Samuels "Optical constants of neat liquid-chemical warfare agents and related materials measured by infrared spectroscopic ellipsometry", Proc. SPIE 8018, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII, 80180M (3 June 2011); https://doi.org/10.1117/12.882067

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