Counterion-Induced Cationic Flexible Nanoparticle Catalytic of Piperidinolysis of Phenyl Salicylate

• Published in: Journal of surfactants and detergents 2017-09, Vol.20 (5), p.1075-1084
• Main Authors: Mohd Noh, Muhammad Azri, Khalid, Khalisanni, Ariffin, Azhar, Khan, M. Niyaz
• Format: Article
• Language: English
• Subjects: Aquatic Pollution; Catalysis; Cations; Cetyltrimethylammonium bromide; Chemistry; Chemistry and Materials Science; Constants; Halobenzoate ions; Industrial Chemistry/Chemical Engineering; Ion exchange; Ion exchange constants; Ions; Kinetics; Nanoparticle catalysis; Nanoparticles; Original Article; Phenyl salicylate; Physical Chemistry; Piperidine; Polymer Sciences; Rate constants; Removal; Salicylic acid; Salts; Sodium; Sodium salts; Surfaces and Interfaces; Thin Films; TTABr; Waste Water Technology; Water Management; Water Pollution Control
• ISSN: 1097-3958; 1558-9293
• DOI: 10.1007/s11743-017-1975-3

The removal of PSa − from bulk aqueous phase to the pseudo-micellar phase by halobenzoate counterion X is responsible for the monotonic increase in k obs (pseudo first-order rate constants) with the increase in the values of [MX] where MX = sodium salts of 2-, and 4-halobenzoic acids. The values of ion exchange constants, K X Br or R X Br for X = 2- and 4-halobenzoate ions in the presence of tetradecyltrimethylammonium bromide (TTABr) were calculated from the apparent catalytic rate constants, X k cat which represent the catalytic effect of CFN. Larger values of K X Br or R X Br were observed for X = 4-halobenzoate ions than that for X = 2-halobenzoate ions due to isomeric factors. The values of K X Br or R X Br determined in the presence of TTABr were compared with previously determined K X Br or R X Br values in the presence of cetyltrimethylammonium bromide (CTABr). The values of K X Br or R X Br are nearly 8 ~ 9-fold larger for 4-IBz − , 4-BrBz − and 4-ClBz − compared to the respective values of X = 2-IBz − , 2-BrBz − and 2-ClBz − . The values of K X Br or R X Br for X = 4-FBz − is nearly 3-fold larger than that for X = 2-FBz − . The values of K X Br or R X Br for X = 2- and 4-halobenzoates are significantly smaller in the presence of TTABr than these in the presence of CTABr nanoparticles.