Dodecylpyridinium chloride

Dodecylpyridinium chloride [104-74-5] M 301.9, m 68-70". Purified by repeated crystn from acetone (charcoal) twice recrystd from EtOH [Chu and Thomas 5 Am Chem Soc 108 6270 1986],... 

Figure 18.11 (a) Osmotic coefficient (b) apparent relative molar enthalpy (c) apparent molar volume and (d) apparent molar heat capacity, at T = 298.15 K and p = 0.1 MPa, for (1) n-decylpyridinium chloride and (2) n-dodecylpyridinium chloride. 

The effect of temperature on the thermodynamic properties and the CMC is shown in Figure 18.13, where 4>L, < >CP and (f>V at three temperatures are graphed as a function of the molality m for n-dodecylpyridinium chloride. We can interpolate the results in Figure 18.13a to determine that L at the CMC is near zero for this surfactant at a temperature near, but just above, 298.15 K. When 4>L = 0, the CMC is at its minimum value. We will better understand why as we consider theories for describing the curves shown in Figures 18.11 and 18.13. 

Figure 18.13 Effect of temperature on (a) apparent relative molar enthalpies (b) apparent molar volumes and (c) apparent molar heat capacities, for n-dodecylpyridinium chloride. The temperatures are (1) 298.15 K (2) 313.15 K and (3) 328.15 K.

The thermodynamic properties at T = 298.15 K shown in Figure 18.11 come from S. Causi, R. De Lisi, and S. Milioto, Thermodynamic properties of N-octyl-, N-decyl- and N-dodecylpyridinium chlorides in water , J. Solution Chem., 20, 1031-1058 (1991). Results at the other two temperatures are courtesy of K. Ballerat-Busserolles, C. Bizzo, L. Pezzimi, K. Sullivan, and E. M. Woolley, Apparent molar volumes and heat capacities at aqueous n-dodecyclpyridium chloride at molalities from 0.003 molkg-1 to 0.15 molkg-1, at temperatures from 283.15 K. to 393.15 K, and at the pressure 0.35 MPa , J. Chem. Thermodyn., 30, 971-983 (1998). 

Hydrotalcite is often too fine grained to produce treatment columns with suitable permeability. As an alternative, the sorbent may be mixed with contaminated water in a tank (Lazaridis et al, 2002). The spent sorbent is then separated from the treated water by flocculation, flotation, or other separation methods (see Section 7.2.4). Lazaridis et al. (2002) investigated the use of surfactants with dispersed-air flotation to separate spent hydrotalcites from treated water. At ionic strengths of 0.1 M using KNO3, effective flotation and separation could be obtained by using a mixture of dodecylpyridinium chloride, sodium dodecylhydrogen sulfate, and a cetyltrimethyl ammonium bromide frother (Lazaridis et al., 2002,322,323). 

Hermann, R., Gerke, J. and Ziechmann, W. (1997) Photodegradation of the surfactants Na-dodecylbenzenesulfonate and dodecylpyridinium-chloride as affected by humic substances. Water Air Soil Pollut. 98,43-55... 

Membrane from a 5% NA cellulose sulfate solution and 20% 0% solutions of cationic surfactants e.g., V-dodecylpyridinium chloride or hexadecylpridinium chloride Hybrid PV + distillation systems... 

Cationic counter-ion N-Dodecylpyridinium chloride silanized silicagel... 

Cyclic alkylammonium compounds resemble the linear products in their properties. They are widely found in antiseptic solutions, cremes, shampoos, and mouthwashes. As an example for this class of compounds, Fig. 5-48 displays the chromatogram of a dodecylpyridinium chloride. Its individual components, with the exception of the main component, exhibit a similar retention behavior to that of Benzalkon A. The minor components of this sample are presumably tetradecyl- and hexadecylpyridinium chloride. 

Fig. 5-48. Separation of dodecylpyridinium chloride. - Separator column IonPac NS1 (10 pm) eluent 0.02 mol/L HC1 / acetonitrile (24 76 v/v) flow rate 1 mL/min detection UV (215 nm) injection volume 50 pL solute concentration 100 mg/L raw material.

Analysis of the quenching data of pyrene fluorescence by 1-dodecylpyridinium chloride, DPC via pulsed laser studies confirms the Poisson distribution of DPC amongst the aggregates. Figure 10A shows the excellent fit of the Poisson kinetics to the time -dependent quenching of Pyrene fluorescence in deaerated aqueous... 

The addition of long-chain alcohols to aqueous anionic and nonionic surfactant solutions is reported to increase their wetting power (Gerault, 1964 Bland, 1968) and the addition of metal soaps, especially those of the alkaline earth metals, is stated to increase the wetting power of dodecylpyridinium chloride solutions (Suzuki, 1967). 

Sodium iodide, thallium(I) sulfate, nitromethane (CH3NO2), dimethylaniline (DMA), and 1-dodecylpyridinium chloride (DPC) were used as quenchers. 

Laurylpyridinium chloride CAS 104-74-5 EINECS/ELINCS 203-232-2 Synonyms 1-Dodecylpyridinium chloride N-Dodecylpyridinium chloride ... 

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