Preparation of Smectite/Dodecyldimethylamine N-oxide Intercalation Compounds

Abstract

The adsorption of dodecyldimethylamine N-oxide into the interlayer space of Na-saponite was investigated. The Na-saponite/dodecyldimethylamine N-oxide intercalation compounds were prepared as supported and unsupported films. Intercalation compounds with two different arrangements of the intercalated dodecyldimethylamine N-oxide were obtained, depending on the adsorbed amounts. When the adsorbed amount was greater than 400 mmol/100 g of clay, the intercalated dodecyldimethylamine N-oxide took a paraffin type bilayer. On the other hand, the intercalated dodecyldimethylamine N-oxide molecules are thought to arrange as a bimolecular coverage with their alkyl chains parallel to the silicate sheet when the added amount of dodecyldimethylamine N-oxide was 100 mmol/100 g of clay. The coadsorption of tris(2,2‘-bipyridine)ruthenium(II) with dodecyldimethylamine N-oxide was achieved. The luminescence characteristics of tris(2,2‘-bipyridine)ruthenium(II) revealed that there are certain interactions between the adsorbed tris(2,2‘-bipyridine)ruthenium(II) and dodecyldimethylamine N-oxide in the interlayer space of saponite. Since the products have been obtained as highly transparent supported and self-standing films, the intercalation of dodecyldimethylamine N-oxide is a way to control the adsorbed states of cationic dyes on the surface of smectites.

Photochromic Intercalation Compounds

“…When the suspension is evaporated on a flat plate, platy particles pile up with their ab plane parallel to the substrate to form a film [117][118][119]. The preparation of thin films by the Langmuir-Blodgett technique from exfoliated platelets of clays has also been reported [120][121][122].…”

Designed Nanostructures of Clay for Controlled Adsorption of Organic Compounds

“…49 Photoinduced electron transfer from the adsorbed porphine to the 2C 16 There are several nonionic surfactants available for the surface modification of smectites. [50][51][52] The interlayer exchangeable cations remain after the intercalation in the hydrophobic media (Fig. 6).…”

“…7) and was possible to control the state of cationic species in the interlayer space. 50 Recently, we have intercalated alkylammonium ions with more complex structures (as shown in Table II) into layered silicates 53 in order to design hydrophobic nanospace.…”

“…Reprinted with permission from[50], M. Ogawa, et al,Langmuir 14, 6969 (1998). © 1998, American Chemical Society.…”