Hydrolysis of toxic organophosphorus compounds by o-iodosobenzoic acid and its derivatives

Latexes with Hexadecyl Group on Their Quaternary Ammonium Ions as Catalytic Media for the Hydrolysis of Paraoxon byo-Iodosobenzoate

“…After the discovery of the true and remarkable catalytic efficiency of IBA, the catalytic activities of it and its derivatives have been investigated intensively for the hydrolysis of various organophosphates in cationic micellar, cationic latex and microemulsion dispersions at slightly basic solutions. [1][2][3][4]7,10,[14][15][16][17][18][19][20][21][22][23][24][25][26][27] Paraoxon (PO) is a toxic, persistent pesticide and few studies investigated its IBA or IBA derivative mediated hydrolysis in different media. [6,10,17,[22][23][24]28] Hammond et al [24] and Moss et al [10] carried out its hydrolysis with excess IBA (as much as 10 times) in aqueous hexadecyltrimethylammonium chloride (CTACl) micelles in slightly basic conditions.…”

Preparation of cationic latexes with different length alkyl groups on their quaternary ammonium ions and their use as supports for IBA catalyst in the hydrolysis of PNPDPP

“…It is well established that this valance tautomeric form (2) is the dominant form in basic conditions [9]. After the discovery of the remarkable catalytic efficiency of IBA, the catalytic activities of it and various iodosyl compounds in micellar media and microemulsions have been investigated for the hydrolysis of various organophosphate esters at slightly basic conditions [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. In addition, polymer, silica, and titanium attached IBAs have been prepared as solid decontaminants and used for the same purpose [25][26][27][28].…”

Reações de transferência de acila em microemulsões água/óleo: hidrólise de benzoatos de fenila catalisada pelo ânion o-iodosobenzoato.

“…Esta alta reatividade sugere a existência de um efeito α, já que o IBA reage mais rapidamente com acetato de 4-nitrofenila que outros nucleófilos de oxigênio de pK a semelhante (MOSS et al, 1987-b) (MACKAY et al, 1987;LESLIE, 1989;HAMMOND et al, 1989;YANG et al 1992). (MOSS et al, 1987-a).…”

“…Compostos similares ao intermediário de iodo hipervalente (5), do tipo 12-I-4, já foram observados (KOSER, 1983;NGUYEN e MARTIN, 1984 (MOSS et al, 1984;MOSS et al, 1986-a,b;KATRITZKY et al, 1988;HAMMOND et al, 1989;PANETTA, et al, 1990;MOSS et al, 1993-a).…”

“…do grupo substituinte, e a forte dependência da hidrofobicidade do catalisador, ou de sua constante de associação com a micela(HAMMOND et al, 1989).A influência da hidrofobicidade do catalisador, no entanto, atinge um limite para catalisadores muito hidrofóbicos. Por exemplo, na hidrólise de PNPH em CTACl de, as constantes de velocidade de segunda ordem para uma série de…”