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Supramolecular systems based on cationic surfactants and amphiphilic macrocycles

“…As was shown in [26], the effect of the acceleration of p nitro phenyl acetate (PNPA) alkaline hydrolysis increases by 15 and 330 times when passing from TMA 16 to TMA 16-Et-OH and TMA 16-(Et-OH) 2 , respec tively. Noncovalent functionalization of surfactants can be performed using mixed systems based on cat ionic surfactants and polymers containing catalyti cally active groups, such as polyethyleneimine (PEI) [26,48,49]. In these systems, the catalytic effect in reactions of nucleophilic substitution in esters of phosphorus based and carboxylic acids can be as high as three orders of magnitude [26,48].…”

“…Noncovalent functionalization of surfactants can be performed using mixed systems based on cat ionic surfactants and polymers containing catalyti cally active groups, such as polyethyleneimine (PEI) [26,48,49]. In these systems, the catalytic effect in reactions of nucleophilic substitution in esters of phosphorus based and carboxylic acids can be as high as three orders of magnitude [26,48]. When using poly(ethylene glycol) and Pluronic F 127, which do not contain catalytically active head groups, the effect of their binary mixtures with gemini surfactant 16 6 16 on alkaline hydrolysis of PNPA and p nitrophenyl caprylate (PNPC) is weaker than that in the case of individual micellar solutions [33].…”

Gemini surfactant-nonionic polymer mixed micellar systems

“…Tempera ture is an important factor determining the behavior pluronic based systems [5,12]. A much smaller num ber of works are devoted to the peculiarities of applying polymer-colloid systems as reaction media, although information is available on their catalytic action, e.g., in the processes of nucleophilic substitution [13][14][15][16].…”

Alkylated polyethyleneimine-cationic surfactant-calix[4]resorcinarene-chloroform catalytic system

“…The polymer-colloid complexes that form in solutions of polymers and nonmacromolecular amphiphilic compounds as a result of noncovalent interactions can function as nanoreactors produc ing metal nanoparticles [1] and catalysts for the hydrolysis of phosphorus acid esters [2,3] and 2 (4 alkoxyphenyl) 1,3 dioxolanes [4]. The amphiphilic component can be a conventional surfactant (anionic, cationic, or nonionic) [5], a pyrimidi nophane [6,7], or a calixarene [8,9].…”

“…Parameters of the reaction between APEI and PNCP in solutions of cationic surfactants in chloroform at C APEI = 0.01 mol/L and 25°C, calculated using Eq (2). …”