Cetyltrimethylammonium chloride solution

Chemical Designations - Synonyms Cetyltrimethylammonium chloride solution Chemical Formula CisH33(CH3)3NCl-HjO-(CH3)aCHOH. 

Preparing mixture solution A Distilled H20, NaOH and surfactant (cetyltrimethylammonium chloride, CTAC) were mixed together with stirring, then adding alumina source (if synthesis of Zr (Ti)-Si-Al material, here adding alumina source + Zr (Ti)... 

Thus, C14MV2- quenches the excited state of [Ru(bipy)3]2+ with a rate constant fcq = 8 x 10s mol-1 dm3 s-1 and this is unaffected by cetyltrimethylammonium chloride (CTAC), up to concentrations of 5 x 10-2 mol dm-3, indicating that mixed CTAC/C14MV2- micelles are not formed.139 In the absence of CTAC, kb in this system is 4x 109 mol-1 dm3 s-1, but flash photolysis showed that this drops to kb s2x 107 mol-1 dm3 s-1 in micellar solution. Thus, the more hydro-phobic radical cation, C14MV+, is solubilized by CTAC micelles, which, having a positive surface, do not allow approach of the oxidized [Ru(bipy)3]3C This then gives an efficiency of 30% for the redox reaction. This study was extended by the removal of the CTAC from solution and the introduction of a Pt catalyst protected by a positively charged polysoap.138 This work is described in Section 61.5.4.7.2. 

Cetyltrimethylammonium chloride (or bromide) (CTA) 510 M ( -0.15%) solution. Standard beryllium solution, preparation as in Section 9.2.1. 

Catalyst preparation Al-MCM-41 was prepared by mixing solution A [tetramethyl amine hydroxide, Cab-O-Sil silica, and] with solution B [NaA102, cetyltrimethylammonium chloride (CTMACl), NaOH, and H2O]. The mixture was heated in an autoclave under autogenous pressure at 363 K for 48 hours. The resulting gel was... 

Soluble starch, cetyltrimethylammonium chloride, ethanol, and cyclohexane were purchased from Aldrich, titanium (IV) isopropoxide was from Acros. All the chemical reagents used in the experiments were used without further purification. All preparations and measurements were made at 333 K. Reverse-micellar solutions in cyclohexane were made by mixing the necessary ingredients. The water/surfactant ratio was kept relatively low in order to reduce... 

Photo-oxidation of ferrocene by CCI4 in solution can normally only be effected by u.v. irradiation. However it has been observed that the reaction may be carried out with visible light in cetyltrimethylammonium chloride micelles, albeit with low quantum yield.It is suggested that the main effect of micellization may be an increase in the oxidation potential of ferrocene or alternatively that a CTTS state of ferrocene is involved under these conditions. The ring substitution of ruthenocene by irradiation in 1 1 (v/v) solutions of ethanol with CCI4, CHCI3, or CH2CI2 proceeds by a mechanism similar to that previously found for ferrocene. Other reports consider the synthesis of ferrocenyl thioesters and the photooxidation of ferrocene. ... 

FT-EPR spectra of the ZnTPPS/DQ system in a solution of cetyltrimethylammonium chloride (CTAC), a cationic surfactant, are shown in figure B 1.16.21. As in the TXlOO solution, both donor and acceptor are... 

TABLE 8. Relative Quantum Yields (4>n) of the Blue Fluorescence of Acridine (0.12 mM) in Solutions of Spherical Micelles of Dodecyltrimethylanunonium Chloride (DTAC), Tetradecylanunonium Chloride (TTAC), and Cetyltrimethylammonium Chloride (CTAC) at pH = 12"... 

The shape and size of self-assembled micellar systems depend on the conditions for a given system. Changes can be induced, e.g., by addition of cosurfactant or salt or by high surfactant concentrations. An aqueous solution of cetyltrimethylammonium chloride (CTAC) exhibits a transition from spherical micelles to elongated cylinders upon addition of chlorate anions, which is shown, for instance, by a strong increase in viscosity [25]. This system was experimentally studied by TRLQ, with results in good agreement with theory, as shown in Fig. 4. 

Kern F, Zana R, Candau SJ (1991) Rheological properties of semidilute tmd concentrated aqueous-solutions of cetyltrimethylammonium chloride in the presence of sodium-salicylate and sodium-chloride. Langmuir 7(7) 1344-1351... 

Solubility, thermodynamic and kinetic acidities of nitroalkanes are of great importance in the course of the reaction, but the hydrophobic effect (Lubineau et al., 1994a) could be involved, since additives such as glucose or saccharose accelerate the reaction even more (Lubineau and Aug6, 1992). Amphiphilic molecules can also influence the hydrophobic interactions. In fact, cetyltrimethylammonium chloride (CTACl) as cationic surfactant promoted the Michael reaction of various nitroalkanes with conjugated enones in dilute aqueous solutions of sodium hydroxide (Ballini and Bosica, 1996) ... 

Prior to the laboratoiy session, the instructor should prepare aqueous stock solutions of CdCl2 and Na2S. The sodium sulfide solution should be fresh but the cadmium chloride solution can be prepared well in advance. Students prepare two batches of solvent by mixing hexanes with 1-pentanol. Next, they add cetyltrimethylammonium bromide (CTAB) surfactant to each. CTAB is only slightly soluble in the organic solvent but upon the addition of a few drops... 

---