Enhanced nucleophilic reactivity of hydroxamate ions in some novel micellar systems for the cleavage of Parathion

Flotation performances and adsorption mechanism of α-hydroxyoctyl phosphinic acid to cassiterite

“…However, these collectors suffered a low selectivity against gangue minerals. Commonly, hydroxamate collectors exhibited superior selectivity in the froth flotation process [7][8][9]. Alkylhydroxamic acids could easily perform the flotation separation of cassiterite from quartz and calcite.…”

Outcomes after the use of gastrostomy tubes in patients whose head and neck cancer was managed with radiation therapy

“…In particular, micelles of positively charged single‐chain surfactants increase the rate of oximolysis of organophosphorus model compounds. 10–17 Single‐chain positively charged surfactants, however, can not be formulated as lotions because of their toxicity 18–20. Positively charged double chain surfactants, however, exhibit much lower levels of toxicity and are routinely used in the cosmetic industry in the formulation of hair softeners 21–26.…”

Comparative studies on reaction of bis(p‐nitrophenyl) phosphate and α‐nucleophiles in cationic micellar media

“…The hydrolysis of triester by α‐nucleophiles in different micellar media is a widely studied reaction . It has been observed that cationic micellar media accelerate the reactivity of α‐nucleophiles . Kinetic aspect of micellar catalysis represents a significant contribution to the observed rate in this case of hydrolysis.…”

“…Micellar rate effects have been quantitatively determined on the basis of pseudophase models that high local concentrations of nucleophiles are largely responsible for the rate acceleration in the interfacial micellar region . It was observed that cationic micelles accelerate the spontaneous hydrolysis of bis( p ‐nitrophenyl) phosphate (BNPP) up to 2 × 10 5 ‐fold and accelerate the reaction of hydroxamates and phosphate triesters . We herein examined micellar effects on the reactions of the less reactive phosphodiester with simple hydroxamates (Scheme ).…”