Calorimetic study of the micellization of alkylpyridinium and alkyltrimethylammonium bromides in water

Article Abstract:

An investigation of the thermodynamic parameters of micellization of N-undecyl-, N-tridecyl-, N-tetradecyl-, and N-pentadecylpyridinium bromides and tetradecyl- and hexadecyltrimethylammonium bromides in salt-free aqueous solutions at 25 degrees C is presented.

Bromides

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Thermodynamics of binding of (R)- and (S)-dinitrobenzoyl leucine to cinchona alkaloids and their tert-butylcarbamate derivatives in methanol: Evaluation of enantioselectivity by spectroscopic (CD, UV) and microcalorimetric (ITC) titrations

Article Abstract:

Enantiomers of N-3,5-dinitrobenzyl-leucine (DNB-Leu) and nonchiral N-3,5-dinitrobenzoyl-glycine (DNB-Gly), denoted as selectands (SAs) to the chiral selectors (SOs), quinine (QN), quinidine (QD) and their derivatives O9-tert-butylcarbamoyl quinine (t-BuCQN) and O9-tert-butylcarbamoyl quinidine (t-BuCQD) are investigated and subjected to quantify binding using isothermal calometric titrations (ITC), circular dichroism (CD), and ultraviolet (UV) spectroscopy.

All Other Basic Organic Chemical Manufacturing, Methanol, Leucine, Chemistry, Physical and theoretical, Physical chemistry, Enantiomers, Chemical properties

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Energetics in correlation with structural features: The case of micellization

Article Abstract:

The first complete thermodynamic study of micellization in which the observed thermodynamic quantities of micellization are discussed in terms of various contributions arising from the solute- solute, solute-solvent, and solvent-solvent interactions and correlated to the measured micellar structural features is presented. The approach is relatively simple, but has a shortcoming of involving at least one unmeasurable component that must be derived by means of some theoretical model.

Thermodynamics

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