Supramolecular catalytic systems based on calix[4]resorcinarene for nucleophilic substitution in phosphorous acid esters.

Zakharova, L.; Mustafina, A.; Valeeva, F.; Ibragimova, A.; Ablakova, Yu.; Elistratova, Yu.; Syakaev, V.; Kudryavtseva, L.; Konovalov, A.

The aggregation and catalytic effect in the reaction of hydrolytic decomposition of phosphorous acid esters are studied for series of systems such as calixarene (CA)-sodium dodecyl sulfate (SDS), CA-poly(ethylene imine) (PEI), SDS-PEI, and CA-SDS-PEI. Using dynamic light scattering, sizes of aggregates are determined, cloud point is estimated, and catalytic effect is studied. Data obtained are consistent with the assumption of the joint aggregation in systems studied. The possibility of the passage from 20-fold inhibiting effect to the catalysis (higher than the order of magnitude) of studied reaction by the immobilization of anionic nanoaggregates (nanoreactors) on a catalytically active polymer matrix is demonstrated. The possibility of the passage from microheterogeneous to heterogeneous system and the separation of catalyst from the products are established.

ESTERS; CALIXARENES; LIGHT scattering; AROMATIC compounds; CATALYSIS; PHYSICAL & theoretical chemistry

Colloid Journal, 2008, Vol 70, Issue 4, p444

1061-933X

Academic Journal

10.1134/S1061933X08040078