Preparation and characterization of organo-bentonites modified by different surfactants was written by Zhou, Xiaojian;Wang, Xiaozhi;Jin, Cuili;Zhao, Bin;Yan, Feng;Feng, Ke. And the article was included in Asian Journal of Chemistry in 2012.Safety of 1-Dodecylpyridin-1-ium bromide This article mentions the following:
Clay minerals with 2:1 type structure possess prodigious area of inner-surface in silicate interlayers. Inserting surfactants into the interlayers will change the characteristics of inner-surface from hydrophilic to hydrophobic ones, which significantly enlarges the capacity of clay minerals to adsorb organic pollutants. Surfactants on the inner-surface of silicates can affect the phys. and chem. properties of the inner-surface and the dimension of interspace. The array forms of the surfactant mols. on the inner-surface of minerals may also influence adsorption capacity to a special organic pollutant. In the present study four surfactants, cetyltrimethylammonium bromide (CTMAB), cetylpyridinium bromide (CPB), dodecyltrimethylammonium bromide (DTMAB) and dodecylpyridiniumbromide (DPB) were selected for production of organo-bentonite. With burning and X-radial diffraction (XRD) the amount of surfactants adsorbed on the inner-surface of bentonite were measured and the mol. array forms of surfactants on the inner-surface of bentonite were discussed. The results were as follows: (1) all surfactants tested could be adsorbed onto the inner-surface of bentonite, which increased the distance between layers of elemental cells; (2) for surfactants with same length of carbon chain, one with pyridinium head is more easily adsorbed on the inner-surface of bentonite than that with trimethylammonium; for surfactants with same head but different length of carbon chains, the one with greater length is more easily adsorbed onto inner-surface of bentonite; (3) The possible mol. array forms of cetyltrimethylammonium bromide and cetylpyridinium bromide, which possess carbon chain with 16 carbon atoms, was assumed to be a pseudo-trilayer lying on the inner-surface of bentonite and those for dodecyltrimethylammonium bromide and dodecylpyridiniumbromide, which possess carbon chain with 12 carbon atoms, were assumed to be a tightly-combined lateral bilayer; (4) with increasing concentration of surfactants the mol. array forms of surfactants on the inner-surface of bentonite became complex: monolayer → lateral bilayer → paraffin-type monolayer → pseudo-trilayer. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Safety of 1-Dodecylpyridin-1-ium bromide).
1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Safety of 1-Dodecylpyridin-1-ium bromide