Quantitative correlation between counterion (X) binding affinity to cationic micelles and X – Induced micellar growth for substituted iodobenzoates (X)

Yusof, Nor Saadah Mohd; Said, Mas Ayu; Khan, M. Niyaz

doi:10.1016/j.arabjc.2013.10.020

Cited by 2 publications

(2 citation statements)

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“…The values of K Br X or R Br X (Tables 1, 2), can also be explained by the following order: FBzNa \ ClBz-Na \ BrBzNa \ IBzNa. This can be attributed to the polarizability difference, as well as the electronegativity of the halogen substituent [31]. The values of K Br X or R Br X increase with the decrease and increase in electronegativity [27] d Ref.…”

Section: Resultsmentioning

confidence: 99%

“…It has been shown that the extent of the catalytic effects of CTABr/MX/ H 2 O can give the value of the ion exchange constant, K Br X [26]. The values of K Br X for X = mono-substituted halobenzoate ions at constant [CTABr] T (where CTABr and [] T represent cetyltrimethylammonium bromide and total concentration, respectively) have been determined and listed elsewhere [27][28][29][30][31]. Furthermore, these counterions are known to affect the structural features of cationic micelles nanoparticles [32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

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

Noh

Khalid

Ariffin

et al. 2017

J Surfact & Detergents

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The removal of PSa− from bulk aqueous phase to the pseudo‐micellar phase by halobenzoate counterion X is responsible for the monotonic increase in kobs (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, KnormalXBr or RnormalXBr for X = 2‐ and 4‐halobenzoate ions in the presence of tetradecyltrimethylammonium bromide (TTABr) were calculated from the apparent catalytic rate constants, Xkcat which represent the catalytic effect of CFN. Larger values of KnormalXBr or RnormalXBr were observed for X = 4‐halobenzoate ions than that for X = 2‐halobenzoate ions due to isomeric factors. The values of KnormalXBr or RnormalXBr determined in the presence of TTABr were compared with previously determined KnormalXBr or RnormalXBr values in the presence of cetyltrimethylammonium bromide (CTABr). The values of KnormalXBr or RnormalXBr 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 KnormalXBr or RnormalXBr for X = 4‐FBz− is nearly 3‐fold larger than that for X = 2‐FBz−. The values of KnormalXBr or RnormalXBr for X = 2‐ and 4‐halobenzoates are significantly smaller in the presence of TTABr than these in the presence of CTABr nanoparticles.

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Section: Resultsmentioning

confidence: 99%