Stability of Titania Nanomaterials Dispersed in Aqueous Solutions of Ionic Liquids of Different Alkyl Chain Lengths was written by Rouster, Paul;Pavlovic, Marko;Cao, Tianchi;Katana, Bojana;Szilagyi, Istvan. And the article was included in Journal of Physical Chemistry C in 2019.SDS of cas: 35487-17-3 This article mentions the following:
Charging and aggregation of titania nanosheets (TNS) and spherical titania nanoparticles (TNP) were studied in aqueous solutions of ionic liquids The pH and the length of the alkyl chain of the IL cations [1-methylimidazolium (MIM+), 1-ethyl-3-methylimidazolium (EMIM+), and 1-butyl-3-methylimidazolium (BMIM+)] were systematically varied in the experiments No detectable interaction was observed between the IL cations and the pos. charged TNS or TNP surfaces at low pH, where the imidazolium derivatives are the co-ions. For the neg. charged titania nano-objects, significant adsorption of MIM+ and EMIM+ took place, leading to charge neutralization and overcharging at appropriate concentrations The BMIM+ behaved like a simple salt constituent causing charge screening. For both TNS and TNP, the MIM+ < EMIM+ < BMIM+ counterion order was obtained in the critical coagulation concentrations, indicating that MIM+ was the most effective in destabilization of the dispersions. The major interparticle forces were of electrostatic origin; however, viscous stabilization was also observed at high IL concentrations The same aggregation mechanism and charging behavior were found for the titania nano-objects irresp. of their shape. The results shed light on the hydrophilic nature of the surface of the TNS and TNP of neg. charge, in contrast to earlier findings with hydrophobic colloidal particles, where the increasing alkyl chain length gave rise to higher destabilization power. The charging properties were governed by specific adsorption of the IL constituents, while the major interparticle forces were qual. well-predicted by the Derjaguin, Landau, Verwey, and Overbeek theory. In the experiment, the researchers used many compounds, for example, 1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3SDS of cas: 35487-17-3).
1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3) belongs to imidazole derivatives. Many natural products, especially alkaloids, contain the imidazole ring. These imidazoles share the 1,3-C3N2 ring but feature varied substituents. This ring system is present in important biological building blocks, such as histidine and the related hormone histamine.SDS of cas: 35487-17-3
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem