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- Title
New organized systems based on amphiphilic oxyethylated calix[4]arene.
- Authors
Kudryashova, Yu.; Valeeva, F.; Zakharova, L.; Solovieva, S.; Antipin, I.; Gubaidullin, A.; Konovalov, A.
- Abstract
The aggregation of amphiphilic oxyethylated calix[4]arene is studied in the absence and presence of polyethyleneimine. At low calixarene concentrations, large ensembles with a hydrodynamic diameter of about 100 nm are formed and coexist with small (smaller than 10 nm) aggregates, which are observed in the entire concentration range. It is established that calixarene-based systems catalyze the neutral hydrolysis of bis(chloromethyl)phosphinic acid p-nitrophenyl ester, with the catalytic effect being as high as two orders of magnitude in the presence of La(III) ions. The rate of hydrolysis of phosphonates depends on the composition of the supramolecular system. The maximum acceleration exceeds three orders of magnitude in comparison with alkaline hydrolysis of the substrates.
- Subjects
CALIXARENES; CLUSTERING of particles; AZIRIDINES; HYDRODYNAMICS; HYDROLYSIS; ESTERS; PHOSPHONATES
- Publication
Colloid Journal, 2012, Vol 74, Issue 1, p67
- ISSN
1061-933X
- Publication type
Academic Journal
- DOI
10.1134/S1061933X12010085