Polymer-Induced Fractal Patterns of [60]Fullerene Containing Poly(methacrylic acid) in Salt Solutions

Tan, Chung How; Ravi, Palaniswamy; Dai, Sheng; Tam, Kam Chiu

doi:10.1021/la0480843

Cited by 32 publications

(38 citation statements)

References 22 publications

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“…20 Over the last couple of few years, we have focused on the synthesis and self-assembly behavior of well-defined fullerene containing polymers. Recently, we have synthesized a series of well-defined stimuliresponsive C 60 containing polyelectrolytes such as poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA-b-C 60 ) 21 and poly(methacrylic acid)-b-C 60 (PMAA-b-C 60 ) 22 , 23 and polyampholytes such as P(MAA-b-DMAEMA)-b-C 60 24 and studied their self-assembly behavior as a function of pH and temperature. Both PDMAEMA-b-C 60 and PMAA-b-C 60 possess micellar-like aggregate at low and high pH respectively.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Self-Assembly of [60]Fullerene Containing Sulfobetaine Polymer in Aqueous Solution

2005

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-A well-defined PDMAEMA-b-C 60 was synthesized using ATRP technique and betainized with 1, 3-sulfobetaine to yield Bet-PDMAEMA-b-C 60 . The solution properties were then studied by light transmittance, laser light scattering and transmission electron macroscopic techniques. It was found that Bet-PDMAEMA-b-C 60 exhibits an upper critical solution temperature (USCT) similar to that observed for Bet-PDMAEMA in aqueous solution. However, modification of Bet-PDMAEMA with a C 60 molecule increases the UCST of the polymer solution, which is a function of the solution ionic strength. Small amounts of salt increase the UCST due to the polyelectrolyte effect, while excess amount of salt leads to a decrease in the UCST attributed to the anti-polyelectrolyte effect. In aqueous salt solution, Bet-PDMAEMA-b-C 60 chains self-assemble into aggregates that coexist with unimeric Bet-PDMAEMA-b-C 60 chains. TEM studies revealed that the system agglomerates when the temperature exceeds the UCST.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Self-Assembly of [60]Fullerene Containing Sulfobetaine Polymer in Aqueous Solution

2005

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“…8 The formation of fractal pattern for PAA-b-C 60 in the presence of mono-valent salt. 31 Copyright, American Chemical Society. Gold nano-particles coated with pH-responsive PMAA-b-PNIPAM copolymers were prepared in a one-pot synthesis, and their physical properties as a function of pH and temperature were examined.…”

Section: Physical Properties Of Ph-responsive Pmaa-related Polymers Amentioning

confidence: 99%

pH-Responsive polymers: synthesis, properties and applications

Ravi²,

2008

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pH-Responsive polymers are systems whose solubility, volume, and chain conformation can be manipulated by changes in pH, co-solvent, and electrolytes. This review summarizes recent developments covering synthesis, physicochemical properties, and applications in various disciplines. A variety of synthetic methodologies comprising of emulsion polymerization and living radical polymerization techniques are described, and some of their salient features are highlighted. Several polymeric systems, such as homopolymers, block copolymers, microgels, hydrogels and polymer brushes at interfaces are reviewed, where important characteristics that govern their behavior in solutions are described. Potential applications of these systems in controlled drug delivery, personal and home care, industrial coatings, biological and membrane science, viscosity modifiers, colloid stabilization, and water remediation, are discussed.

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“…Water-soluble C60-containing poly(acrylic acid)(PAA-b-C60) synthesized by Yang et al 25 formed coreshell micelles in aqueous solution, which enhanced the photoconductivity of the film. Tam et al synthesized a series of well-defined C60-containing water-soluble polymeric systemsusing ATRP, such as poly(methacrylic acid)-b-C60 (PMAA-b-C60) and poly(2-(dimethylamino)ethyl methacrylate)-b-C60 (PDMAEMA-b-C60), and their self-assembly behaviour in aqueous solution was studied as a function of pH and temperature 26,27 . However, to our best of knowledge there has been no attempt to graft C60 onto poly(2-bromomethyl) acrylic acid.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of [60] Fullerene Grafted Polymer: Self-Assembly Behavior in Polar Solvents

Haldorai¹,

Islam²,

Shim³

2014

Asian J. Chem.

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In this report, we prepared a new type of [60] fullerene grafted poly(2-bromomethyl)acrylic acid. First step was the free-radical polymerization of 2-(bromomethyl)acrylic acid by using 2,2'-azobisisobutyronitrile. Then a nucleophilic substitution reaction was performed to substitute the bromine atoms present in the polymer with azide groups. Finally, the C60 grafted polymer was prepared by the reaction of azido functionalized polymer with C60. Results of Fourier transform infrared spectroscopy and ultraviolet-visible spectroscopy indicated that the C60 was chemically bonded to the polymer. The aggregation behavior of the resulting polymer in polar solvents was studied by transmission electron microscopy. The resultant polymer retained both electronic property of the C60 moiety and processability property of the polymer.

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Polymer-Induced Fractal Patterns of [60]Fullerene Containing Poly(methacrylic acid) in Salt Solutions

Cited by 32 publications

References 22 publications

Synthesis and Self-Assembly of [60]Fullerene Containing Sulfobetaine Polymer in Aqueous Solution

Synthesis and Self-Assembly of [60]Fullerene Containing Sulfobetaine Polymer in Aqueous Solution

pH-Responsive polymers: synthesis, properties and applications

Fabrication of [60] Fullerene Grafted Polymer: Self-Assembly Behavior in Polar Solvents

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