Catalytic efficiency and stability of tertiary amines in oxidation of methyl 4-deoxy-β-L-threo-hex-4-enopyranosiduronic acid by hypochlorous acid

Afsahi, Ghazaleh; Bertinetto, Carlo; Hummel, Michael; Kesari, Kavindra Kumar; Vuorinen, Tapani

doi:10.1016/j.mcat.2019.110413

Cited by 1 publication

(2 citation statements)

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“…At this pH, the chloroammonium formation is fast due to the abundance of HOCl and unprotonated CEM-DABCO. This pH is similar to the range where the chloroammonium cation of the other alkyl-substituted DABCO was seen (Afsahi et al 2019).…”

Section: Optimal Ph For the Chloroammonium Cation Of Cem-dabcosupporting

confidence: 69%

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Tertiary amine-catalyzed generation of chlorine dioxide from hypochlorous acid and chlorite ions

et al. 2020

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The reaction between hypochlorous acid and chlorite ions is the rate limiting step for in situ chlorine dioxide regeneration. The possibility of increasing the speed of this reaction was analyzed by the addition of tertiary amine catalysts in the system at pH 5. Two amines were tested, DABCO (1,4-diazabicyclo[2.2.2]octane) and its derivative CEM-DABCO (1-carboethoxymethyl-1-azonia-4-aza-bicyclo[2.2.2]octane chloride). The stability of the catalysts in the presence of both reagents and chlorine dioxide was measured, with CEM-DABCO showing to be highly stable with the mentioned chlorine species, whereas DABCO was rapidly degraded by chlorine dioxide. Hence, CEM-DABCO was chosen as a suitable candidate to catalyze the reaction of hypochlorous acid with chlorite ions and it significantly increased the speed of this reaction even at low catalyst dosages. This research opens the door to a faster regeneration of chlorine dioxide and an improved efficiency in chlorine dioxide treatments.

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Section: Optimal Ph For the Chloroammonium Cation Of Cem-dabcosupporting

confidence: 69%

“…Recently, an alkyl-substituted DABCO derivative called CM-DABCO was used to generate an active but stable chloroammonium cation in the presence of HOCl at pH 5 (Afsahi et al 2019). Hence, alkyl-substituted DABCO derivatives appear to have a larger potential in the catalysis of the chlorine dioxide regeneration reaction.…”

Section: Introductionmentioning

confidence: 99%