Complex formation between poly(acrylic acid) and pyrene-labeled polyethylene glycol in aqueous solution

Oyama, Hideko T.; Tang, Wing T.; Frank, Curtis W.

doi:10.1021/ma00169a002

Cited by 97 publications

(70 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Bokias et al [21], interpolymer complexes do not form beyond 10% PAA ionization, and thus at pH 6 and more, hydrogen bonds make no contribution to the mechanical properties. The stark difference in load bearing between the high and low pH regimes is consistent with the experimentally validated phenomenon of PEG/PAA complex formation [22], and as such, is evidence that internetwork hydrogen bonds are strength-enhancing elements in this system.…”

Section: The Impact Of Ph On Ipn Fracture Propertiessupporting

confidence: 81%

Biomimetic strain hardening in interpenetrating polymer network hydrogels

Myung

Koh

et al. 2007

Polymer

Self Cite

207

185

View full text Add to dashboard Cite

Section: The Impact Of Ph On Ipn Fracture Propertiessupporting

confidence: 81%

Biomimetic strain hardening in interpenetrating polymer network hydrogels

Myung

Koh

et al. 2007

Polymer

Self Cite

207

185

View full text Add to dashboard Cite

“…3,4, 12, 21-23), excimer formation (e.g., refs. [24][25][26][27][28][29][30][31][32], phosphorescence (19,(33)(34)(35), and fluorescence anisotropy (e.g., refs. 13, 3-3).…”

Section: Introductionmentioning

confidence: 99%

Luminescence studies of hydrophobically modified, water-soluble polymers. I. Fluorescence anisotropy and spectroscopic investigations of the conformational behaviour of copolymers of acrylic acid and styrene or methyl methacrylate

Ebdon¹,

Hunt²,

Lucas³

et al. 1995

Can. J. Chem.

View full text Add to dashboard Cite

Fluorescence spectroscopy and anisotropy measurements have been used to study a series of styrene -acrylic acid, STY-AA, and methyl methacrylate -acrylic acid, MMA-AA, copolymers in dilute methanolic and aqueous solutions. Copolymerization of either STY or MMA with AA has little effect upon the rate of intramolecular segmental motion in methanol solutions. In aqueous media, intramolecular hydrophobic aggregation occurs and restricts the macromolecular dynamics to an extent dependent upon pH, nature of the comonomer, and copolymer composition. The hydrophobic domains formed in these copolymer systems can solubilize organic guests. In this respect, STY is a more powerful modifier of AA-based polymer behaviours than is MMA. In general, the hydrophobic modification increases the solubilization power of the resultant polymer. Furthermore, the copolymers retain their solubilization capacities to higher values of pH the more hydrophobic the comonomer and the greater its content in the copolymer. The interiors of the hydrophobic aggregates reduce the mobilities of occluded guests: the microviscosities of the domain interiors depend upon the nature of the hydrophobe, pH, and copolymer composition.

show abstract

“…When the total fluorescence intensity from the phosphate 22 is compared with that of the phosphoramidite P2, at equal concentrations of the chromophore, the phosphoramidite only exhibits 17% of the total fluorescence emission from 22. (Table 3), indicating that additional mechanisms, apart from exciplex formation, are available to quench P2 fluorescence that are not present in the model compound 22.…”

Section: Bis-phosphorarnidite Jluorescencementioning

confidence: 99%

“…When the interactions between the chromophores and the solvent are sufficiently unfavourable, some association of the aromatic groups could occur. One documented example of this effect involves pyreneend-capped polyethylene oxide (PEO, M , = 8000) in aqueous solution (21)(22)(23)(24). Hydrophobic attractions between the pyrenes lead to a small proportion of the chains (ca.…”

Section: Chain Conformation and Dynarnicsmentioning

confidence: 99%

Photophysical behavior of oligoethylene glycols labeled with naphthalene carboxylate and phosphate esters

Lee¹,

Winnik²

1994

Can. J. Chem.

View full text Add to dashboard Cite

SAM LEE and MITCHELL A. WINNIK. Can. J. Chem. 72, 1587 (1994).The fluorescence spectra of tri-and tetraethylene glycol esterified with 2-(1-naphthy1)ethyl ethyl phosphate and 241-naphthy1)ethyl 2-(ethoxy)ethyl phosphate were studied in dilute solutions of tetrahydrofuran (THF) and diethyl ether. They were con~pared with the fluorescence from tri-and tetraethylene glycol esterified with I-naphthyl acetic acid. These compounds form intramolecular excimers. The extent of excimer formation is not extensive, but the relative amount of excimer emission from these compounds varies with the choice of solvent. Three synthetic intermediates to the phosphates, the 2-(1-naphthy1)ethyl ~,~-diiso~ro~~l~hos~horamidites of tri-and tetraethylene glycol and of 2-ethoxyethanol, were also examined. These compounds fonn intramolecular exciplexes. In THF, the relative amount of exciplex emission from the phosphoramidites follows the same trend as the carboxylate esters. In diethyl ether, the trend is different. Rates of fluorescence decay have been measured for these compounds. The results are discussed in terms of how inforn~ation about the conformational and dynamic behavior of these molecules in solution can be obtained, and how the solvent can influence the relative amounts of excimer or exciplex fluorescence.

show abstract

Complex formation between poly(acrylic acid) and pyrene-labeled polyethylene glycol in aqueous solution

Cited by 97 publications

References 6 publications

Biomimetic strain hardening in interpenetrating polymer network hydrogels

Biomimetic strain hardening in interpenetrating polymer network hydrogels

Luminescence studies of hydrophobically modified, water-soluble polymers. I. Fluorescence anisotropy and spectroscopic investigations of the conformational behaviour of copolymers of acrylic acid and styrene or methyl methacrylate

Photophysical behavior of oligoethylene glycols labeled with naphthalene carboxylate and phosphate esters

Contact Info

Product

Resources

About