Chemistry

A solvent-free solid catalyst for the selective and color-indicating ambient-air removal of sulfur mustard

D. L. Collins-wildman, K. P. Sullivan, et al.

Discover a breakthrough in chemical safety with a novel solvent-free catalyst that selectively oxidizes sulfur mustard to a less toxic form, all while detecting its presence through a color change! This innovative research was conducted by a team of experts from Emory University and the U.S. Army Combat Capabilities Development Command Chemical Biological Center.

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Abstract

This paper reports a solvent-free, solid catalyst for the selective oxidation of sulfur mustard (HD) to the less toxic sulfoxide using ambient air at room temperature. The catalyst comprises hydrophobic salts of tribromide and nitrate, copper(II) nitrate hydrate, and Nafion™. It rapidly removes HD as a neat liquid or vapor and exhibits a colorimetric change from green to brown in the presence of HD, enabling detection. Mechanistic studies confirm the reversible formation of a key bromosulfonium ion intermediate and the role of Cu(II) in accelerating the reaction. XANES and EXAFS studies confirm tribromide regeneration.

Publisher

Communications Chemistry

Published On

Mar 08, 2021

Authors

Daniel L. Collins-Wildman, Kevin P. Sullivan, Yurii V. Geletii, Victoria G. Snider, Wesley O. Gordon, Alex Balboa, Yiyao Tian, Rachel M. Slaugenhaupt, Alexey L. Kaledin, Christopher J. Karwacki, Anatoly I. Frenkel, Djamaladdin G. Musaev, Craig L. Hill

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