Layered Alkyltrimethylammonium Chromates: Thermal and Structural Investigations and Crystal Structure of the Anhydrous Bisoctyltrimethylammonium Dichromate

Bis(2,6-dimethylpyridinium) dichromate

“…The shorter distances correspond to double bonds and the longer distances to single bonds. They are in good agreement with those found in bipyridinium dichromate (Martín-Zarza et al, 1995), bis(-octyltrimethylammonium) dichromate (Fossé et al, 1998) and tetramethylammonium dichromate (Fossé et al, 2001). The coordination geometry of each Cr atom is distorted tetrahedral.…”

Thermal and Structural Investigations of the Bis-Dihexadecyldimethylammonium Dichromate

“…As for the bis-alkyltrimethylammonium dichromate salts synthesis (23), the bisdihexadecyldimethylammonium dichromate has been prepared by using a quaternary alkylammonium salt, [ …”

“…In the temperature range of 200 to 3003C, the weight loss (C) associated with the exothermic peak (C) is due to the surfactant decomposition, by a selfcombustion process. This large exothermic peak C suggests an oxidation}reduction phenomenon through which gaseous products (evolved gas analysis by mass spectrometry) (23) …”

“…Due to a wide range of promising potential applications in adsorption, batteries, catalysis, ceramic precursors, nonlinear optics, electronic conductivity and sensors, interest in transition metal oxides possessing a micro(meso)porous texture or micro(meso) structure has increased over the past few years. With these interests in mind, lamellar mesostructured alkyltrimethylammonium dichromates ( 12, 14, 16, 18; x"0, 2) prepared from a mixture of chromium oxide and alkyltrimethylammonium bromide have been recently published (22,23). In the present paper, we report on the synthesis and characterization of a new anhydrous bisdihexadecyldimethylammonium dichromate (DHDDMACr) by means of thermal analysis, polarizing microscopy, and X-ray di!raction.…”

Inorganic–Organic Hybrid Surfactant Crystals: Structural Aspects and Functions

“…Single-headed surfactants contain alkyltrimethylammonium ([CnH2n+1N(CH3)3] + (CnNC3), Figure 6a) [113,115,116,119,125,126,130,131] Figure 6b) [114,117], or alkylammonium derived from primary amine ([CnH2n+1NH3] + (CnNH3), Figure 6c) [123]. In addition, heterocyclic surfactants such as pyridinium ([C5H5N(CnH2n+1)] + (Cnpy), Figure 6e) [118,[120][121][122][127][128][129], pyridazinium ([C4H4N2(CnH2n+1)] + (Cnpda), Figure 6f) [128], and methylimidazolium ([(CnH2n+1)C3H3N2(CH3)] + (Cnmim), Figure 6g) [123,124] are employed.…”