NIPPON KAGAKU KAISHI

1977

DOI: 10.1246/nikkashi.1977.1035

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根岸直樹¹,

高橋正行²,

et al.

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Cited by 7 publications

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“…Photo-induced resistance change of PMG in THF-H 2 0 (10:1) at 20°C:[PMG]. O.lgdl-1 , light intensity, 25 mW cm-Photo-induced wettability change on the surface of a PMG film: 8, contact angle with water; light intensity, 25m W em-2 …”

mentioning

confidence: 99%

Photoresponse of Polystyrene Having Malachite Green Leucohydroxide Side Groups

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1981

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“…Photo-induced resistance change of PMG in THF-H 2 0 (10:1) at 20°C:[PMG]. O.lgdl-1 , light intensity, 25 mW cm-Photo-induced wettability change on the surface of a PMG film: 8, contact angle with water; light intensity, 25m W em-2 …”

mentioning

confidence: 99%

Photoresponse of Polystyrene Having Malachite Green Leucohydroxide Side Groups

¹

,

²

,

³

1981

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No abstract

Photoregulated binding ability of azoaromatic polymer for surfactant

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³

1981

J. Polym. Sci. Polym. Chem. Ed.

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Water‐soluble polymeric azodyes containing an azobenzene moiety in their side chain, p‐phenylazoacrylanilide (PAAn)–acrylamide (AAm) copolymers, were synthesized and the adsorption‐desorption behavior of sodium dodecyl sulfate (SDS) onto these copolymers in water was investigated by means of conductivity measurements, with attention to the hydrophobicity of the copolymer. The conductivity of the PAAn‐AAm copolymer/SDS complex aqueous solution decreased with increasing PAAn composition in the copolymer. This result indicates that the SDS molecules adsorbed onto the copolymer. The adsorption state of SDS molecules on the copolymer was considered to take a micellelike form. When the hydrophobicity of the PAAn‐AAm copolymer was decreased by means of the photoisomerization of an azodye moiety, the conductivity of the PAAn‐AAm copolymer/SDS aqueous solution increased. This phenomenon can be explained as a result of desorption of SDS molecules from the copolymer. When the light source was cut off, the conductivity took on its original value. This indicated that SDS was desorbed by the photochemical trans to cis and adsorbed by cis to trans isomerization of the PAAn moiety.

Complex formation of amphiphilic polymers with azo dyes and their photoviscosity behavior

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1982

J. Polym. Sci. Polym. Chem. Ed.

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The hydrophobic interaction of amphiphilic copolymers, which contain 2‐hydroxyethyl methacrylate(HEMA) and 1vinyl‐2‐pyrrolidone (VPy), with Methyl Orange (MO) was compared with that of HEMA‐acrylamide (AAm) copolymers to deduce the correlation between their complexation ability in a photochromic azo dye and the photoviscosity effect in aqueous copolymer/dye complex solution. On the basis of the dialysis data and fluorometric analysis it appeared that the complexation dependence on HEMA content in the copolymers was due to the hydrophobic interaction between the polymer and the dye. For a comparable HEMA content AAm copolymers bound less MO than VPy copolymers. It was confiied by photoviscosity measurements that the conformation of the complex composed of photochromic azo dye and HEMA copolymer changed reversibly in response to the photo‐ and thermal isomerization of the dye. In HEMA‐AAm copolymer systems the photoviscosity effect was small compared with that of HEMA‐VPy copolymer systems. From these results it was concluded that the complexation ability of polymers due to the hydrophobic interaction was an important factor in producing a large photoinduced conformational change in water.

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