Versatile catalysts constructed from hybrid polyoxomolybdates for simultaneously detoxifying sulfur mustard and organophosphate simulants. Issue 10 (3rd April 2019)

• Record Type: Journal Article
• Authors: Hou, Yujiao; An, Haiyan; Chang, Shenzhen; Zhang, Jie
• Is Part Of: Catalysis science & technology. Volume 9:Issue 10(2019)
• Page Start: 2445
• Page End: 2455
• Publication Date: 2019-04-03
• Subjects: Catalysis -- Periodicals; 541.395
• DOI: 10.1039/c9cy00094a
• Languages: English
• ISSNs: 2044-4753

Abstract

Abstract : Twelve new hybrid dimers based on carboxylic acid ligand modified polyoxomolybdates were prepared, which can rapidly oxidize the mustard gas simulant, CEES, and hydrolyze the nerve agent simulant, DECP, at room temperature. Abstract : Chemical warfare agents (CWAs) containing sulfur mustard and organophosphates are among the most toxic materials known to mankind and have caused lots of casualties during wars and terrorist attacks. Development of catalysts with selective oxidation and hydrolysis abilities for detoxification of these two types of CWAs is highly desired. Here, we report a series of carboxylic acid modified polyoxomolybdate derivatives with high catalytic performance in the degradation two typical chemical warfare agent simulants: 2-chloroethyl ethyl sulfide (CEES) and diethyl cyanophosphonate (DECP), at room temperature. Our results demonstrate that CEES can be highly-selectively degraded to the corresponding far less toxic 2-chloroethyl ethyl sulfoxide (CEESO) with the oxidant H2 O2 within 12 minutes, and DECP is almost completely hydrolysed to nontoxic products within 10 minutes. The catalytic activities of these compounds were found to be influenced by the metal cations, carboxylic acid ligands and heteroatoms of polyoxoanions. The corresponding order is respectively Co 2+ > Ni 2+, Zn 2+, Mn 2+ ; PABA > Ala, Ac; AsMo > TeMo.