Fluorescence cetyltrimethylammonium chloride

Fluorimetric methods [34] Fluorimetric sequential injection analysis of magnesium in commercial drinking waters is based on the complexation of magnesium (II) with 8-hydroxyquinoline-5-sulfonic acid in the presence of ethylene glycol-bis(6-aminoethyl ether)-N,N,N, N -tetra-acetic acid as a masking agent and cetyltrimethylammonium chloride as the fluorescence enhancer. 

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"... 

Celade and De Schryver applied the same model to the fluorescence quenching in SDS micelles by neutral molecules [45,46] and in inverted micelles by halogene anions [47]. The intermicellar exchange of the counterions (iodine ions) was studied for cetyltrimethylammonium chloride (CTAC) micelles [48] and the value kg=9A X10 dm mole" s was obtained. 

MaUiaris, A., Lang, J., Zana, R. Dynamic behavior of fluorescence quenchers in cetyltrimethylammonium chloride micelles. J. Chem. Soc., Faraday Trans. 1, 1986, 82, 109-118. 

Figure 6.4 Stopped-flow/fluorescence relaxation signal from a 1.2 mM soybean lecithin-0.1 mM cetyltrimethylammonium bromide mixed with 1.2 mM lecithin-0.01 mM cetylpyridinium chloride. Both solutions also contained 0.15 M NaCl, 5 vol.% ethanol and 15 pM pyrene. The signal is biphasic (see break in time scale). The fast process corresponds to the transfer of pyrene between vesicles. The slow process is associated with the motion flip-flop of the cetylpyridinium chloride. Reproduced from Reference 42 with permission of the American Chemical Society.

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