1-hexadecylpyridinium bromid

There are a variety of cationic surfactants other than quaternary alkylammonium salts. Accordingly, complex formation of 1-hexadecylpyridinium bromide (CPB) was attempted (Figure 4.44). After many trials, ten complex crystals were obtained, two of which were suitable for X-ray analysis, i.e. with guaiacol (XXXIII) and 9-anthracenecarboxylic acid (XXXTV) (Figure 4.44). The two crystals are isostructural. 

Hexadecylpyridinium chloride (cetylpyridinium chloride) Hexadecylpyridinium bromide (cetylpyridinium bromide) Dioctadecyldimethylammonium chloride... 

The most frequently used ionic SDAs are again CTAB/CTAC, OTAB/OTAC as well as hexadecylpyridinium bromide/chloride (CPB/CPC), whereby the syntheses are carried out under basic conditions, and most commonly surfactants of the Pluronic and Brij type 86 are used as nonionic SDAs under acidic conditions. In rare cases also Gemini surfactants or long alkyl chained ionic liquids were applied as SDAs, whereby an ethane-bridged PMO with a Fm-3m symmetry was successfully prepared for the first time.88... 

From the results of an investigation of the effects of hexadecyltri-methylammonium iodide, hexadecylpyridinium bromide, and sodium hexadecylsulfonate on the protonation equilibria of a large number of indicators of different charge types (Table 12), Hartley (1934) proposed a sign rule to account for the observed shifts in the equilibria. Considering only electrostatic interactions and the valence changes of the indicators, Hartley s rule states that cationic micelles are not expected to influence the equilibria of the -I- -I- -I- type, and likewise... 

SDS sodium dodecyl sulfate HDTC1 hexadecyltrimethylammonium chloride HDTBr hexadecyltrimethylammonium bromide Brij 35 polyoxyethylene (23) lauryl ether DTAC dodecyltrimethylammonium chloride TTAC1 tetradecyltrimethylammonium chloride HDPB hexadecylpyridinium bromide KDC potassium decanoate SPFO sodium perfluorooctanoate KTC potassium tetradecanoate... 

A photoresponsive surfactant (77) containing an azobenzene moiety has been used to control micellar catalysis78). The proton abstraction from benzoin which can be monitored by the disappearance of 2,6-dichlorophenolindophenyl is catalyzed by cationic micelles such as hexadecylpyridinium bromide (HDPB). If the reaction occurs in micelles containing both (77) and HDPB, the reaction is slower than in pure... 

Hexadecylpyridinium bromide 742 Hexanedioic acid, dimethyl ester 1358... 

Over recent years the question of whether or not surfactants form aggregates similar to micelles and mesophases in other polar solvents has received considerable attention [168-191]. The solvents concerned are polar liquids such as glycerol, ethylene glycol, formamide or ethyl ammonium nitrate (a molten electrolyte at ambient temperature). The answer is yes, but the thermodynamics of the aggregation process is somewhat different. Figures 40 and 41 show measurements of EMF in hexadecylpyridinium bromide solutions where water and ethylene glycol are solvents. 

Aoyagi, T., Terashima, 0., Nagase, Y., Matsui, K. (1991). Preparation of a polymer containing hexadecylpyridinium bromide groups and its utilization as a transdermal drug penetration enhancer, 32,... 

Fig. 10. The effect of hexadecylpyridinium bromide on the hydrolysis of triolein by lipase. The rate of hydrolysis is expressed in arbitrary units, taking that of the control in the absence of detergent as 100. The rate of acid liberation in the control experiment was 0.32meq/hour (308).

Cetylpyridinium bromide CAS 140-72-7 EINECS/ELINCS 205-428-3 Synonyms N-Cetylpyridinium bromide Hexadecylpyridine bromide Hexadecylpyridinium bromide Classification Quaternary ammonium compd. Empirical C2iH3sBrN Formula CieHaaCsHsNBr Properties Cream-colored waxy solid sol. in acetone, ethanol, chloroform m.w. 384.44 cationic... 

Hexadecylpyridine bromide Hexadecylpyridinium bromide. See Cetylpyridiniurn bromide Hexadecylpyridinium chloride 1-Hexadecylpyridinium chloride n-Hexadecylpyridinium chloride. See Cetyl pyridini urn chloride Hexadecyl sodium sulfate. See Sodium cetyl sulfate... 

Figure 4.44 Structural formulae of hexadecylpyridinium bromide (CPB) and 9-anthracenecarboxylic acid...

Hexadecylpyridinium bromide (Mj 385 hexadecylpyridinium = 304) in 2-nitro-benzyl alcohol... 

Nitrobenzyl alcohol solution of hexadecylpyridinium bromide (M 385 hexadecylpyridinium = 304 enhances detectability and reduces metal ion adducts of sample [3].)... 

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