One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, such as the rate of change in the concentration of reactants or products with time. 615-36-1, Name is 2-Bromoaniline, formurla is C6H6BrN. In a document, author is Das, Sourav, introducing its new discovery. SDS of cas: 615-36-1.
Studies on the self-aggregation, interfacial and thermodynamic properties of a surface active imidazolium-based ionic liquid in aqueous solution: Effects of salt and temperature
The influence of four sodium salts (NaCl, NaBr, Na2SO4, and Na3PO4) on the self-aggregation, interfacial, and thermodynamic properties of a surface active ionic liquid (1-hexadecyl-3-methylimidazolium chloride, C(16)MImCl) has been explored in aqueous solutions by conductometry, tensiometry, spectrofluorimetry, isothermal titration calorimetry and dynamic light scattering (DLS). Analyses of the critical micellar concentration (cmc) values indicate that the anions of the added salts promote the self-aggregation of C(16)MImCl in the order: Cl- < Br- < PO43-< SO42-. Dehydration of imidazolium head groups, in general, governs the process of micellization of aqueous C(16)MImCl in presence of the investigated salts within the investigated temperature range (298.15-318.15 K), while the melting of iceberg takes the leading role below 303.15 K for the C(16)MImCl-Na3PO4 system. The results indicate that addition of salt leads to a greater spontaneity of micellization, and that exothermicity prevails in these systems. Differential effect of the salts on the interfacial properties of C(16)MeImCl has been interpreted on the basis of the coupled influence of the electrostatic charge neutralization of surfactants at the interface, and the van der Wa-als repulsion of surfactant tails and electrostatic repulsion of surfactant head groups. C(16)MeImCl has been predicted to form spherical micelles in presence of varying amounts of NaCl, Na2SO4 and Na3PO4, while there occurs probably a transition in the micellar geometry from spherical to non-spherical shape when added NaBr concentration exceeds 0.01 mol.kg(-1). Fluorescence studies demonstrate that a combined quenching mechanism is operative for the quenching of pyrene fluorescence in the investigated C(16)MImCl-salt systems. Micellar aggregation numbers obtained from Steady State Fluorescence Quenching method have always been found be somewhat smaller than those estimated from Time Resolved Fluorescence Quenching method. The order of instability of the C(16)MImCl-micelles ascertained from Zeta potential measurements conform to what has been inferred from the cmc values. The hydrodynamic diameters of C(16)MImCl-micelles, obtained from DLS studies, have been found to increase with increasing salinity of the solutions. (C) 2020 Published by Elsevier B.V. I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 615-36-1 help many people in the next few years. SDS of cas: 615-36-1.