Measurement of the rates of detergent exchange between micelles and the aqueous phase using phosphorescent labelled detergents

Journal Article · Thu Dec 24 04:00:00 EST 1981 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j150626a015· OSTI ID:5589123

Bolt, J D; Turro, N J

Phosphorescence quenching is used to measure micelle-probe detergent dynamics. For phosphorescent detergent probes with varying hydrocarbon length the rate constants from escape (K-) from cationic host micelles are measured using cobalt(III) hexamine as an aqueous soluble triplet quencher. For 10-(4-bromo-1-naphthoyl) decyltrimethylammonium bromide (BND-10), K- is 3.2 x 10/sup 3/ S/sup -1/, and K+, the reentry rate constant, is 5.7 x 10/sup 7/ M/sup -1/ S/sup -1/ for hexadecyltrimethylammonium chloride (HDTCL) host micelles at 25 C. The log of K- is a linear function of the number of methylenes in the probe alkyl chain, in agreement with rates determined previously with relaxation methods. The apparent activation energy for escape of BND-10 from HDTCL micelles is 9 kcal/mol. Escape rates are measured for several host micelles and for micelles composed of probe detergents - self-micelles. 15 references.

• OSTI ID: 5589123
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 85:26; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACTIVATION ENERGY
DISPLACEMENT FLUIDS
ENERGY
FLUIDS
KINETICS
LUMINESCENCE
MEASURING METHODS
MICELLAR SYSTEMS
PHOSPHORESCENCE
REACTION KINETICS
SURFACTANTS