Polymeric decontaminant: N,N‐dichloro poly(styrene‐co‐divinyl benzene) sulfonamide—synthesis, characterization and efficacy against simulant of sulfur mustard

Abstract

N,N-Dichloro poly(styrene-co-divinylbenzene) sulfonamide (1) reacts with 2-chloro ethyl phenyl sulfide (2), a simulant of sulfur mustard (SM), at room temperature, yielding corresponding nontoxic sulfones and sulfoxides in aqueous as well as aprotic medium. The decontamination reaction was monitored by gas chromatography, and products were identified by gas chromatography-mass spectrometry. N,N-dichloro poly(styrene-codivinylbenzene) sulfonamide was synthesized by three steps from a commercial starting material sulfonate cationexchange resin and characterized by FTIR, and TGA, and compressive strength by universal testing machine. The positive chlorine content of this polymer was checked by standard iodometry titration. The synthesized positive chlorine compound is observed to be a promising against a simulant of SM, chiefly in the situation where use of aqueous medium is precluded.

Polymeric decontaminant 2 (N,N‐dichloropolystyrene sulfonamide): Synthesis, characterization, and efficacy against simulant of sulfur mustard

“…GC results indicated in aqueous medium 100% simulant were decomposed within 20 min. In present study 50% oxidation was completed in 7 min as compared to earlier published work (20 min) 25 Mechanism 7,30 of decontamination reaction in aqueous medium, simulant, was converted into a series of oxidation and elimination products, the first step in chlorination of sulfide is electrophilic attack of chlorine on sulfur, generating sulfonium cation. Subsequently, nucleophilic displacement of chlorine by water with elimination of HCl produces corresponding sulfoxide.…”

“…17 A macro porous poly(styrene-co-divinylbenzene) resin having N,N-dichloro sulfonamide groups [18][19][20] have been used as a polymer supported reagent for chlorination, oxidation for residual sulfides, 21 cyanides, 22 thiocyanates, 23 water disinfection, 18 and some application in synthetic organic chemistry. 24 We have already reported N,N-dichloro poly (styrene-co-divinylbenzene) sulfonamide as a polymeric decontaminant 25 for simulant of sulfur mustard but this polymer have two disadvantages, first it is insoluble in almost all solvents and secondly, it showed prolonged decontamination time. Synthesis of soluble polymeric decontaminant have not been reported.…”

H3PW12O40·4H2O as an efficient catalyst for the conversion of cellulose into partially substituted cellulose acetate

“…The thermal properties of microcrystalline cellulose, cellulose acetate with a DS value of 1.50 and 2.29 were characterized by TGA and DSC measurements in N 2 atmosphere, and the results are shown in Figure . The mass loss observed within 150°C is associated with the removal of physically adsorbed molecular water . It also can be noticed in Figure (a) that only one considerable weight loss occurred between 300 and 400°C in TGA curves of all samples.…”

Redox polymer with N,N‐dichlorosulfonamide functional groups as arsenite oxidant in aqueous solutions

“…In the method proposed in the present article the oxidation of As(III) has been extended to the use of a polymer having N,N ‐dichlorosulfonamide groups (abbreviated as R/Cl 2 ), which consists of a styrene‐divinylbenzene macroporous matrix with attached functional groups containing two chlorine atoms with oxidation number +1. Owing to its oxidative properties the polymer has been used as a biocide for water disinfection, in some organic synthesis applications and as a decontaminant of chemical warfare agents . Our investigations have been devoted to the synthesis of this polymer and its application in the removal of some toxic inorganic admixtures (cyanide, thiocyanate, sulfide, nitrite), through their transformation into environmentally safe substances (i.e., oxidation of sulfide to sulfate), from waters …”