Counterion Binding by Polyelectrolytes. I. Exploratory Electrophoresis, Solubility and Viscosity Studies of the Interaction between Polyphosphates and Several Univalent Cations

Strauss, Ulrich P.; Woodside, Daniel; Wineman, Philip L.

doi:10.1021/j150556a021

Cited by 47 publications

(19 citation statements)

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“…For comparison, the molecular weight, calculated on the basis of the sedimentation and diffusion coefficients obtained from hydrodynamic measurements, is 286 000. Both these molecular-weight estimates, however, could be overestimates, since polyphosphates are known to form strong complexes with alkali-metal ions (Strauss et al, 1957), and in an 0.4 M-NaCI solution, in which the experiments were done, the Na+ ion could be part of the polyphosphate molecule.…”

Section: Ponentsmentioning

confidence: 99%

The molecular composition of the volutin granule of yeast

Jacobson¹,

Halmann²,

Yariv³

1982

Biochemical Journal

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The volutin granule was isolated from yeast by disruption of freeze-dried cells in an organic solvent and density-gradient-gradient centrifugation. The granule is composed of two types of macromolecule, a linear-chain polyphosphate and four basic proteins, of molecular weights ranging from 10 000 to 20 000. In the dissolved granule these macromolecules are in a complex that is uniform by hydrodynamic criteria (s20,w = 22.3 S). The polyphosphate separated from this complex gives a single 31P n.m.r. resonance and in the analytical ultracentrifuge behaves as a monodisperse solute of molecular weight 245 000 +/- 1000. In the 31P n.m.r. spectrum of yeast used for its isolation, this polyphosphate accounts for 14% of total cell polyphosphate.

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Section: Ponentsmentioning

confidence: 99%

The molecular composition of the volutin granule of yeast

Jacobson¹,

Halmann²,

Yariv³

1982

Biochemical Journal

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“…These cationic monomers with quaternary ammonium group are usually the quaternary ammonium group sites on the polymeric side chain 8–18. The effect of various salt ions on the interaction of polyelectrolytes in the aqueous solution was investigated and the site‐binding interaction of salt ions and polymer using Huggins equation k ′ was also investigated 19–33. The counterion size was found to affect the degree of side binding for salt ion‐attracting polymers.…”

Section: Introductionmentioning

confidence: 99%

Poly(sulfobetaine)s and corresponding cationic polymers. VIII. Synthesis and aqueous solution properties of a cationic poly(methyl iodide quaternized styrene–n,n‐dimethylaminopropyl maleamidic acid) copolymer

Lee

Chen

2001

J of Applied Polymer Sci

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ABSTRACT:A cationic poly(methyl iodide quaternized styrene-N,N-dimethylaminopropylmaleamidic acid) copolymer was synthesized through amidoacidification reaction of styrene-maleic anhydride copolymer with N,N-dimethylaminopropylamine (ring-opening reaction). Its properties in various aqueous salt solutions and pH solutions were studied by measurements of reduced viscosity and intrinsic viscosity. The results indicated that the reduced viscosity and intrinsic viscosity of this cationic polyelectrolyte were related to the type and concentration of the added salts and the results also showed a contrary tendency in some salts with monovalent acid groups to polyelectrolyte. At the same time, some salt ions were observed to strongly attract the quaternary ammonium group of the cationic polymeric side chain and resulted in agglomeration of the polymers.

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“…Strauss et al (29) observed analogous phenomena in polyphosphate solutions, where the transition from counterion-independent to counterion-dependent E.M. occurred at 0.08 M bromide.…”

Section: C Influence Of the Finite Size Of The Counterions And Of Hmentioning

confidence: 77%

Electric transport properties of alkali polymethacrylates in alkali bromide solutions

Drift

Overbeek

1979

Journal of Colloid and Interface Science

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Electric mobilities of polyions, bromide ions, and alkali ions have been determined in solutions of Li, Na, and K salts of polymethacrylic acid (PMA) in aqueous solutions of the corresponding bromide of concentrations varying from 0.001 to 0.1 M. The Hittorf method was used for the determination of the mobilities of the PMA ion and of the Br-ion. The mobilities of the alkali ions followed from these two mobilities and the conductivity. A few moving boundary experiments have been carried out with tetramethylammonium PMA. The mobility of PMA was independent of the PMA concentration and of the kinds of cations and changed only slowly with the degree of neutralization. The bromide mobility decreased slowly with increasing PMA concentration. The interpretation was based upon a separation of the contributions from the polyelectrolyte salt and those of the supporting electrolytes. The mobilities of the counterions that neutralized the polyions were very low and in several cases even negative. Electrophoretic retardations varied from about 20 to 70 12 -~ cmz eq -~. By using the relaxation correction as found from conductivity data we could interpret the mobility of the PMA ion as that of a cylinder of 0.35-nm radius surrounded by a solvation layer of 0.2-to 0.3-nm thickness. For bromide concentrations up to 0.03 M the agreement was excellent; at a 0.1 M bromide concentration binding of about 25% of the counterions to the polyions had to be assumed to reconcile the model calculations with the experiments. Intrinsic viscosities of NaPMA in NaBr solutions have been used to obtain an estimate of the overall size of the polyelectrolyte coil and to justify the cylinder model.

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Counterion Binding by Polyelectrolytes. I. Exploratory Electrophoresis, Solubility and Viscosity Studies of the Interaction between Polyphosphates and Several Univalent Cations

Cited by 47 publications

References 0 publications

The molecular composition of the volutin granule of yeast

The molecular composition of the volutin granule of yeast

Poly(sulfobetaine)s and corresponding cationic polymers. VIII. Synthesis and aqueous solution properties of a cationic poly(methyl iodide quaternized styrene–n,n‐dimethylaminopropyl maleamidic acid) copolymer

Electric transport properties of alkali polymethacrylates in alkali bromide solutions

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