Interaction of Pyrene-Labeled Hydrophobically Modified Polyelectrolytes with Oppositely Charged Mixed Micelles Studied by Fluorescence Quenching

and, Masanobu Mizusaki; Morishima, Yotaro; Dubin, Paul L.

doi:10.1021/jp9732118

Cited by 42 publications

(63 citation statements)

References 47 publications

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“…Little work has been carried out on interactions of surfactant mixtures with polymers, one of the common additives in applications [7,8]. In a previous paper, we developed an``ideal mixing/ideal cooperative binding'' model of the interaction of binary surfactants, tetradecylpyridinium chloride (TeP) and decylammonium chloride (DeA), with the oppositely charged poly(L-glutamate) [P(Glu)] [9].…”

Section: Introductionmentioning

confidence: 99%

The interaction of mixed surfactants with polyelectrolytes

1999

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IntroductionIn most practical applications surfactant mixtures are used rather than a pure species [1]. The reason for this is frequently based on more favorable characteristics of mixtures and the lower cost of production than preparing the individual surfactant components involved. The synergistic properties of mixed surfactants have motivated much of the research in this ®eld [2].Most of the studies on mixed surfactant systems have been concerned with mixed micelle formation and mixed monolayers [3±6]. Little work has been carried out on interactions of surfactant mixtures with polymers, one of the common additives in applications [7,8]. In a previous paper, we developed an``ideal mixing/ideal cooperative binding'' model of the interaction of binary surfactants, tetradecylpyridinium chloride (TeP) and decylammonium chloride (DeA), with the oppositely charged poly(L-glutamate) [P(Glu)] [9]. A surfactantselective electrode was used to measure the equilibrium concentration of surfactant in solution and circular dichroism (CD) was used to investigate the conformational change of P(Glu) in the mixed surfactant solutions. Because the membrane electrode is much more responsive to TeP than to DeA (the electrode selectivity of DeA over TeP is about 0.003), at least the binding isotherms of TeP in the surfactant mixtures can be built up experimentally. Furthermore, with the help of theoretical considerations, individual binding isotherms were ®gured out separately. In order to see the applicability of the theoretical treatment, we have extended the investigation to a system composed of two homologous cationic surfactants, TeP and dodecylpyridinium chloride (DoP), and an anionic linear polymer, sodium poly(2-acrylamide-2-methylpropane sulfonate) (PAMPS). Since the linear polymer, PAMPS, does not assume any ordered structure in surfactant solution detectable by a CD method, spectroscopy is not suitable anymore. Moreover, the electrode membrane selectivity of DoP over TeP is about 0.12, i.e., the membrane is sensitive to both DoP and TeP. Neither the binding isotherms of TeP nor of DoP could be constructed from the experimental method. However, by using the same ideal mixing model, the binding isotherms of the mixed surfactants can be extracted from the limited experimental data, which helps us get an Abstract The interactions between a linear polymer, sodium poly(2-acrylamide-2-methylpropane sulfonate), and two cationic surfactants, dodecylpyridinium chloride and tetradecylpyridinium chloride and their mixtures with dierent ratios, were studied by a potentiometric titration method using a surfactant-selective electrode. The ideal mixing/ideal cooperative binding model we had proposed previously was applied to successfully predict the binding isotherms of the mixed surfactant systems and the critical aggregation concentrations of the binding. The binding of surfactant mixtures to polymers is similar to the ideal mixed micelle formation and a sort of synergetic eect was found during the binding process.

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Section: Introductionmentioning

confidence: 99%

The interaction of mixed surfactants with polyelectrolytes

1999

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“…[1][2][3] The studies include nonionic polymers and ionic surfactants, [4][5][6] nonionic polymers and nonionic surfactants, 7,8 ionic polymers and ionic surfactants, [9][10][11] and hydrophobically-modified polymers with ionic 12,13 and nonionic 14 surfactants. We are particularly interested in the studies on the interactions of surfactants with stimuli-responsive polymers due to the potential practical applications of these systems.…”

Section: Introductionmentioning

confidence: 99%

Smart anionic polyelectrolytes based on natural polymer for complexation of cationic surfactant

Szczubiałka

Rosół

Nowakowska

2006

J of Applied Polymer Sci

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The thermosensitive polyelectrolytes were obtained by grafting 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) onto hydroxypropylcellulose (HPC), a biodegradable polysaccharide. The interactions of the polymers with dodecyltrimethylammonium chloride (DTAC), a model cationic surfactant, were studied. It was found by the measurements of the surface tension and the analysis of fluorescence emission of pyrene used as a fluorescent probe, that the HPC-AMPS graft polymers strongly interact with DTAC with the formation of polymer-surfactant complexes. The critical aggregation concentrations of these polymer-surfactant systems were found to be of the order of 10 À5 mol/dm 3 . The polymers were found to be potentially useful in the purification of water from cationic surfactants.

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“…[33][34][35][36] Among these methods, fluorescence techniques are expected to provide a powerful tool to gain insight into the dynamics of polyelectrolyte-micelle interactions. Recently, we used a pyrene-labeled polyanion in conjunction with quencher-carrying mixed micelles to characterize the microscopic polyelectrolytemicelle phase transition.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, we used a pyrene-labeled polyanion in conjunction with quencher-carrying mixed micelles to characterize the microscopic polyelectrolytemicelle phase transition. [33][34][35][36] The intensity of the polyelectro- † Part of the special issue "Noboru Mataga Festschrift". ‡ Current address: Shiseido Basic Research Center, 2-2-1 Hayabuchi, Tsuzuki, Yokohama 224-8558, Japan…”

Section: Introductionmentioning

confidence: 99%

“…A previously proposed kinetic model 35,36 was used to interpret steady-state and time-dependent fluorescence quenching data, which made it possible to examine the residence time of the micelle in the polymer-micelle complex as a function of the micelle charge density and the ionic strength. Such measurements may be directly comparable to the results of Monte Carlo simulations.…”

Section: Introductionmentioning

confidence: 99%

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Steady-State and Time-Dependent Fluorescence Quenching Studies of the Binding of Anionic Micelles to Polycation

et al. 2001

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Soluble complex formation between poly(N-methyl-4-vinylpyridinium chloride) (QPVP) and mixed micelles of dodecyl octa(ethylene glycol) monoether (C 12 E 8 ) and sodium dodecyl sulfate (SDS), driven by electrostatic interactions in water, was investigated by turbidimetric, quasielastic light scattering, and fluorescence techniques. The polymer-micelle interaction was monitored through quenching of fluorescence of pyrene probes solubilized in C 12 E 8 /SDS mixed micelles, the quenching occurring upon binding of the micelles to QPVP. Unlike the case in which fluorescence-labeled polyelectrolytes are employed in conjunction with quencher-carrying micelles to monitor polymer-micelle interactions, QPVP plays a dual role as a polycation to interact with anionic micelles and a quencher for fluorescence of a probe solubilized in the micelle. Thus, hydrophobic contribution from fluorescence labels, an additional complexity in the former case, can be eliminated by employing QPVP, making it possible to monitor polymer-micelle interactions without hydrophobic effects. The presence of a well-defined critical mole fraction of SDS (Y c ) at which a soluble polymer-micelle complex formation begins to occur was confirmed. The Y c values determined by turbidimetric and fluorescence titrations were found to be in good agreement. Dynamic interactions of QPVP with pyrene-carrying C 12 E 8 /SDS mixed micelles were monitored by steady-state and time-dependent fluorescence quenching techniques. The charge on the micelle was varied systematically by varying the mole fraction of SDS (Y) in the mixed micelle. Steady-state and time-dependent fluorescence-quenching data were analyzed using, as a first approximation, a kinetic model proposed previously. The lifetime of the micelle bound to the polymer (i.e., the residence time) was estimated as a function of the micelle surface charge density and ionic strength. Results revealed that the residence time is a strong function of both Y and the ionic strength.

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Interaction of Pyrene-Labeled Hydrophobically Modified Polyelectrolytes with Oppositely Charged Mixed Micelles Studied by Fluorescence Quenching

Cited by 42 publications

References 47 publications

The interaction of mixed surfactants with polyelectrolytes

The interaction of mixed surfactants with polyelectrolytes

Smart anionic polyelectrolytes based on natural polymer for complexation of cationic surfactant

Steady-State and Time-Dependent Fluorescence Quenching Studies of the Binding of Anionic Micelles to Polycation

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