Specific counterion binding to cationic polyelectrolytes

Burkhardt, Charles W.; Parazak, Dennis P.; McCarthy, Kevin; Jackson, G. J.

doi:10.1002/app.1986.070320434

Cited by 18 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…HCl was added to change the polymer charge density, and 1 N HCl was expected to be enough to obtain a fully charged P4VP. 13 To prepare gel samples under a same cross-linking condition irrespective of the degree of quaternization, one must try γ-ray irradiation for fully charged P4VP, namely in 1 N HCl. This condition seemed to be rather severe for gelation to occur because electrostatic repulsion between polymer chains will retard coupling of radicals formed on different polymer chains.…”

Section: Methodsmentioning

confidence: 99%

Swelling Behavior of Partially Quaternized Poly(4-vinylpyridine) Gels in Water/Organic Solvent Mixtures

Kawaguchi

Satoh

1999

Macromolecules

View full text Add to dashboard Cite

Partially quaternized poly(4-vinylpyridine) (P4VP) gels were prepared by irradiating aqueous solutions with γ-rays. Swelling degrees in water increased with increasing the degree of quaternization (charge density) except for gels of I -or SCN -counterions, while those in mixed solvents (water/methanol, ethanol, 2-propanol, dimethyl sulfoxide, acetone, or dioxane) decreased with increasing the charge density and/or with decreasing the dielectric constant of the mixed solvent. This trend was more evident for counterion species having stronger affinity to quaternary ammonium group, e.g., I -and SCN -, for which very sharp deswelling, comparable to volume phase transition, was observed even in water. A remarkable finding was that the sharp collapse occurred at almost a constant dielecric constant (D) irrespective of the solvent species; e.g., when the counterion was Cl -, the collapse was observed at D ) 58 ( 2 for 50% quaternized gel and at 71 or 72 for the fully quaternized one. Effects of cross-linking, counterion binding, polymer charge density, and dielectric constant of solvent on the gel collapse are discussed.

show abstract

Section: Methodsmentioning

confidence: 99%

Swelling Behavior of Partially Quaternized Poly(4-vinylpyridine) Gels in Water/Organic Solvent Mixtures

Kawaguchi

Satoh

1999

Macromolecules

View full text Add to dashboard Cite

show abstract

“…Burkhardt et al [29] suggest using ionic polarizability values, but their results correlate poorly with 4 CIO − . The addition of a single methylene spacer, in going from poly (vinylammonium) to poly (allylammonium), leads to markedly different binding results [25] and [27].…”

Section: Polymer Titrations In the Absence Of Added Saltmentioning

confidence: 98%

“…This partitioning has been exploited as a removal strategy in PEUF using poly(diallyldimethyl ammonium) chloride [22] and [31]. When studied as a precipitating agent with poly (1, 2 dimethyl-5-vinylpyridinium chloride), [29]. In addition, in their studies of poly (allylammonium) with various counterions, Ochiai et al [27] also observed that 4 CIO − was the most effective shielding agent among the anions studied.…”

Section: Polymer Titrations In the Absence Of Added Saltmentioning

confidence: 99%

“…These competing effects are perhaps compensatory and provide for similar counterion binding results with PVPs. Within various expressions of the Hofmeister series, Br − and − are often equated[29]. In ion chromatography, which involves similar counterion-polyelectrolyte interactions, Br − and − are notoriously difficult to separate on ion exchange columns, as they tend to exhibit very similar binding behaviors[30].…”

mentioning

confidence: 99%

See 1 more Smart Citation

Counterion Binding in Aqueous Solutions of Poly(vinylpyridines) as Assessed by Potentiometric Titration

Roach¹,

Bondaruk²,

Al-Abdulghani³

et al. 2016

AMPC

View full text Add to dashboard Cite

The extent to which counterions bind to polyelectrolytes influences a variety of polymer-based applications, including polyelectrolyte enhanced ultrafiltration and forward osmosis using polyelectrolytes as draw agents. Potentiometric titrations of poly (2-vinylpyridine) (P2VP), poly (3-vinylpyridine) (P3VP), and poly (4-vinylpydine) (P4VP) were performed using HBr, HCl, HNO 3 , and HClO 4 in both the presence and absence of added NaCl. Because of the systematic differences among the three polyelectrolytes, titration results provide insight into the role of polymer structure in the relative extents to which various counterions bind. Titration data reveal that ionization properties vary as functions of polymer investigated, titrant used, degree of protonation, and added salt concentration. Acid dissociation constants of the pyridinium moieties were found to generally increase with increasing degree of protonation, though appreciable differences were exhibited among the three polymers investigated. For all three polymers, Cl − demonstrated the lowest affinity for the charged pyridinium residues, while the affinities associated with Br − and 3 NO − were nearly identical to each other. The relative extent of binding for 4 CIO − varied across the polymers investigated, and was greatest for P4VP.

show abstract

“…We chose chloride and sulfate anions because they have the largest ionic polarizability in the Hofmeister anion series, [9] which is crucial for both the cationic platinum(II) complexes to be dissolved and to stabilize the dispersion of the resultant polycations in water. Indeed, we experienced no problems in preparing transparent aqueous solutions of the chloride and sulfate salts of complexes 1 a-d, 2 a, 2 b, and 3 with concentrations up to 20 wt %.…”

mentioning

confidence: 99%

Supramolecular Polymers and Chromonic Mesophases Self‐Organized from Phosphorescent Cationic Organoplatinum(II) Complexes in Water

et al. 2009

View full text Add to dashboard Cite

Specific counterion binding to cationic polyelectrolytes

Cited by 18 publications

References 0 publications

Swelling Behavior of Partially Quaternized Poly(4-vinylpyridine) Gels in Water/Organic Solvent Mixtures

Swelling Behavior of Partially Quaternized Poly(4-vinylpyridine) Gels in Water/Organic Solvent Mixtures

Counterion Binding in Aqueous Solutions of Poly(vinylpyridines) as Assessed by Potentiometric Titration

Supramolecular Polymers and Chromonic Mesophases Self‐Organized from Phosphorescent Cationic Organoplatinum(II) Complexes in Water

Contact Info

Product

Resources

About