Influence of various electrolytes on the interaction of cetyltrimethylammonium bromide with tetradecyltrimethylammonium bromide at different temperatures and compositions: Experimental and theoretical investigation

2019 ◽  
Vol 278 ◽  
pp. 86-96 ◽  
Author(s):  
Md. Masud Alam ◽  
Shahed Rana ◽  
Malik Abdul Rub ◽  
Md. Anamul Hoque ◽  
Shariff E. Kabir ◽  
...  
Keyword(s):  
Theoretical Investigation ◽  
Cetyltrimethylammonium Bromide ◽  
Tetradecyltrimethylammonium Bromide ◽  
Different Temperatures

Study of Intermolecular Interactions of CTAB with Amino Acids at Different Temperatures: A Multi Technique Approach

2019 ◽  
Vol 233 (2) ◽  
pp. 167-182 ◽  
Author(s):  
Anwar Ali ◽  
Nizamul Haque Ansari ◽  
Ummer Farooq ◽  
Shadma Tasneem ◽  
Firdosa Nabi
Keyword(s):  
Molar Volume ◽  
Intermolecular Interactions ◽  
Cetyltrimethylammonium Bromide ◽  
Complete Characterization ◽  
Viscosity Data ◽  
Viscosity Coefficients ◽  
Free Energy Of Activation ◽  
Different Temperatures ◽  
Amino Acid Solutions

Abstract The densities, ρ, viscosities, η and specific conductivities κ, of (0.0002, 0.0004, 0.0006 and 0.0008 m) CTAB in 0.1 m aqueous valine, leucine and isoleucine were measured at different temperatures. The measured data were used to calculate various useful thermodynamic parameters. A complete characterization of any mixture can be performed by means of these thermodynamic properties. The apparent molar volume, ϕv, partial molar volume, $\phi _v^0$ and partial molar isobaric expansibilities, $\phi _E^0,$ were calculated using density data. The viscosity data were analyzed using Jones–Dole equation to obtain viscosity coefficients, A- and B-, free energy of activation per mole of solvent, Δμ1°∗, and solute, Δμ2°∗, enthalpy, ΔH∗ and entropy, ΔS∗ of activation of viscous flow. Measuring the changes in these properties has been found to be an excellent qualitative and quantitative way to obtain information regarding the molecular structure and intermolecular interactions occurring in these mixtures. Various structure-making/breaking ability of solute (cetyltrimethylammonium bromide) in presence of aqueous amino acid solutions were discussed. In addition, fluorescence study using pyrene as a photophysical probe has been carried out, the results of which support the conclusions obtained from other techniques.

Theoretical investigation on the reaction mechanism and kinetics of a Criegee intermediate with ethylene and acetylene

2019 ◽  
Vol 21 (30) ◽  
pp. 16583-16590
Author(s):  
Cuihong Sun ◽  
Baoen Xu ◽  
Liqiang Lv ◽  
Shaowen Zhang
Keyword(s):  
Reaction Mechanism ◽  
Theoretical Investigation ◽  
Branching Ratios ◽  
Decomposition Products ◽  
Different Temperatures ◽  
Mechanism And Kinetics ◽  
Kinetics Of

The competition among the possible pathways, the branching ratios of the adduct and the decomposition products at different temperatures and pressures have been evaluated.

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