A study of the mechanism of hydrolysis of nitrophenyl esters catalyzed by polyethyleneimine containing benzyl groups

Polyethyleneimine + Cationic Surfactant Systems: Self-Organization and Reactivity Study

“…Supramolecular systems based on surfactants and polymers attract wide attention from researchers in the fields of colloid and polymer chemistry, catalysis, ecology, biology, etc. − Polyethyleneimines (PEIs) attract particular interest due to their application in the oil industry, genetic engineering, analytic chemistry, pharmacology, medicine, etc. − There are a number of publications on the surface and solution behavior of the PEI-based systems. − In the PEI + surfactant systems aggregation is found to occur in a different way depending on the solution pH, the surfactant type, and the molecular mass and architecture of PEI. In the case of cationic surfactants (CSs) only their complexes with polyanions have been intensively studied, ,, while interactions with uncharged polymers and the more so with cationic polyelectrolytes have been scarcely explored, with the exception of a few studies − focused on the formation of mesostructured thin films at the water/PEI + CTAB solution interface.…”

Nanosized Reactors Based on Polyethyleneimines: From Microheterogeneous Systems to Immobilized Catalysts

“…Data on aqueous polyethyleneimine (PEI) solutions and their complexes with surfactants − and metal ions − are available in recent literature. There have been a few studies on the catalytic activity of the PEI−water systems. − In contrast, information on the catalytic properties of the polymer−surfactant complexes including those based on PEI is scarce. − The purpose of this article is to fill up these gaps.…”

“…There have been a few studies on the catalytic activity of the PEI-water systems. [25][26][27][28][29][30][31][32][33][34] In contrast, information on the catalytic properties of the polymer-surfactant complexes including those based on PEI is scarce. [35][36][37][38] The purpose of this article is to fill up these gaps.…”

Catalytic hydrolysis by synthetic polymers

“…This remarkable catalytic activity was attributed to the structural characteristics of polyethyleneimine which is highly branched, and provides a matrix with a high local density of residues. Kabanov et aL employed linear and branched polyethyleneimines containing benzyl groups 9 as catalysts for the hydrolysis ofp-nitrophenyl esters (123). The catalytic site was considered to be a benzylated amino group, and this tertiary amino group catalyzed the hydrolysis by the general base mechanism as evidenced by the absence of acylated polyethyleneimine and by the isotope effect (kH2o/kD2o = 1.8-2.8).…”