Interactions of sodium polystyrene sulfonate with 4-methylpyridinium based ionic liquids in aqueous solution: Viscometry, conductometry, UV-Vis spectroscopy and density functional theory studies was written by Mehrdad, Abbas;Parvini, Elahe. And the article was included in Journal of Chemical Thermodynamics in 2019.SDS of cas: 65350-59-6 This article mentions the following:
Viscosity (η) and molar conductivity (δ) of aqueous solutions of sodium polystyrene sulfonate (NaPSS) in the presence of some 4-methylpyridinium based ionic liquids (1-Butyl-4-methylpyridinium bromide [BMPyr]Br, 1-Hexyl-4-methylpyridinium bromide [HMPyr]Br and 1-Octyl-4-methylpyridinium bromide [OMPyr]Br) were investigated at T = (288.15, 298.15 and 308.15) K. The viscosity values were correlated with the Wolf equation to obtain the intrinsic viscosity ([η]) of NaPSS. The intrinsic viscosity of NaPSS decreases by increasing the concentration of ionic liquids due to screens effects of ionic liquids and decreased with increasing alkyl chain length of ILs. The scaling theory is used for the description of elec. conductance of polyelectrolytes. The values of fractions of uncondensed counterions f have been estimated The effects of the polyelectrolyte concentration, the relative permittivity of the medium, different alkyl chain length and the temperature on the fractions of uncondensed counterions of NaPSS aqueous solutions have been discussed. UV-Vis spectroscopy and Quantum chem. calculations studies are also used to confirm the existence of interactions between NaPSS and ILs. The UV-Vis spectra of NaPSS show that the conformation of NaPSS changes in the presence of ionic liquids; therefore the value of elec. multipole moment decreases. Consequently, the absorption intensity of NaPSS was decreased with the addition of ionic liquids D. functional theory (DFT) has been used to investigate the interactions between [PSS]– anion and [RMPyr]+ cations. The mol. electrostatic potential, natural bond orbital methodologies and atoms in mols. are used to analyses the nature of interactions of the ion-pairs [RMPyr]+[PSS]–. In the experiment, the researchers used many compounds, for example, 1-Butyl-4-methylpyridin-1-ium bromide (cas: 65350-59-6SDS of cas: 65350-59-6).
1-Butyl-4-methylpyridin-1-ium bromide (cas: 65350-59-6) belongs to pyridine derivatives. Pyridine has a conjugated system of six π electrons that are delocalized over the ring. The molecule is planar and, thus, follows the Hückel criteria for aromatic systems. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. SDS of cas: 65350-59-6