Adsorption of linear and star-shaped poly(acrylic acid) to model surfaces formed by amphiphiles at the air/water interface

Schnitter, Martin; Engelking, Joachim; Heise, Andreas; Miller, Robert D.; Menzel, Henning

doi:10.1002/1521-3935(20000801)201:13<1504::aid-macp1504>3.0.co;2-t

Cited by 21 publications

(5 citation statements)

References 39 publications

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“…That makes larger the molecular area due to the binding of DNA occupying larger surface area and smaller the charge repulsive effect, which lead to the change of stacking property of surfactant monolayer with surface pressure. Such a property is similar to the interaction of surfactant on general polyelectrolyte subphase as described in literature [14,15].…”

Section: Instrument and Measurementmentioning

confidence: 99%

In-situ observation of the aggregated morphology and interaction of dialkyldimethylammonium bromide with DNA at air/water interface by Brewster angle microscopy

Sun

Hou

et al. 2004

Materials Letters

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Section: Instrument and Measurementmentioning

confidence: 99%

In-situ observation of the aggregated morphology and interaction of dialkyldimethylammonium bromide with DNA at air/water interface by Brewster angle microscopy

Sun

Hou

et al. 2004

Materials Letters

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“…The structural changes occurring upon polyelectrolyte adsorption can be used to monitor the adsorption process when a preformed monolayer of ionic amphiphiles is brought into contact with a subphase containing an oppositely charged polyelectrolyte. [14][15][16][17][18] The properties of poly(p-phenylene)s may be applicable for advances in light-emitting diodes. Oriented films of poly(p-phenylene)s are of particular interest in this respect, because of their polarized emission.…”

Section: Introductionmentioning

confidence: 99%

Piezochromic Effect and Orientational Order in Monolayers and LB Multilayers of Poly(p-phenylenesulfonate)− Dioctadecyldimethylammonium Bromide Complexes

2000

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By spreading dioctadecyldimethylammonium bromide (DODA) on a subphase containing rigid-rod-like poly(p-phenylenesulfonate)s (PPPS), polyelectrolyte complexes are formed in situ at the air-water interface. These complex monolayers are investigated by recording surface pressure/area isotherms, UV/vis spectroscopy, and, after transfer onto a solid substrate, X-ray photoelectron spectroscopy (XPS) and X-ray reflectivity (XR). XPS and XR measurements indicate that although the polyelectrolytes are aggregated in aqueous solution, the complexes are stoichiometric. The isotherms show that the area per amphiphile in the complex monolayer is significantly higher than in the monolayer of pure DODA. This is due to the distance of the ionic sites along the rigid-rod-like polymer chain and results in a more tilted arrangement of the alkyl chains as confirmed by the XR measurements. UV/vis spectroscopy reveals that the A-band of the PPPS is red-shifted in the complex, and a further red shift of the A-band upon compression of the complex monolayer is observed. This two-dimensional piezochromic effect is discussed to be a result of the electronic interaction of the π-systems, which improves with decreasing distance during compression. Upon transfer to solid substrates the rigid-rod-like polyelectrolytes are oriented to be parallel to the dipping direction as evidenced by polarized UV/vis spectroscopy. The degree of order in the LB film shows a linear dependence on the axial ratio of the rigid-rod-like PPPS.

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“…[19,21] These initiators have been prepared according to an already published procedure. [22] Trimethylsilyl-protected hydroxyethyl methycrylate (HEMA-TMS) and the above-mentioned initiators (Scheme 2) were employed to synthesize linear and starshaped prepolymers. The use of HEMA-TMS results in a better reaction control, thus is adjustable degree of polymerization and narrow molecular weight distribution.…”

Section: Resultsmentioning

confidence: 99%

“…Dendritic initiators and their synthesis. [22] Scheme 2. Catalyst and ligand systems used for the ATRP polymerization.…”

Section: Resultsmentioning

confidence: 99%

Surface Relief Gratings in Azobenzene‐Containing Polymers with Linear and Star‐Branched Architectures: A Comparison

Gharagozloo-Hubmann

Kulikovska

Börger

et al. 2009

Macro Chemistry & Physics

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The influence of molecular architecture on light‐induced SRG formation was investigated. Polymers with different degree of branching were synthesized by ATRP and functionalized with azobenzene chromophores. The polymers differ only in their architecture – linear, 4‐, 6‐, or 12‐arms stars. The photo‐induced dichroism as well as the efficiency of SRG formation was similar for all polymers of this series. New consideration for the origin of the driving force was used to explain this behavior. The comparable SRG inscription rate in differently branched polymers can be rationalized by assuming that azobenzene acts as an internal molecular motor and can cause a non‐turbulent motion on a scale smaller than that on which normal entanglement restriction forces act.magnified image

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Adsorption of linear and star-shaped poly(acrylic acid) to model surfaces formed by amphiphiles at the air/water interface

Cited by 21 publications

References 39 publications

In-situ observation of the aggregated morphology and interaction of dialkyldimethylammonium bromide with DNA at air/water interface by Brewster angle microscopy

In-situ observation of the aggregated morphology and interaction of dialkyldimethylammonium bromide with DNA at air/water interface by Brewster angle microscopy

Piezochromic Effect and Orientational Order in Monolayers and LB Multilayers of Poly(p-phenylenesulfonate)− Dioctadecyldimethylammonium Bromide Complexes

Surface Relief Gratings in Azobenzene‐Containing Polymers with Linear and Star‐Branched Architectures: A Comparison

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