Reversible redox processes of poly(anilines) in layered semiconductor niobate films under alternate UV-vis light illumination.

Reversible redox processes of poly(anilines) in layered semiconductor niobate films under alternate UV-vis light illumination. Research Abstract Details 

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Reversible redox processes of poly(anilines) in layered semiconductor niobate films under alternate UV-vis light illumination. Abstract Text:

Yoshihisa Inui,Tatsuto Yui,Toshio Itoh,Kimitaka Higuchi,Takahiro Seki,Katsuhiko Takagi,Yoshihisa Inui,Tatsuto Yui,Toshio Itoh,Kimitaka Higuchi,Takahiro Seki,Katsuhiko Takagi,

The synthesis of polyaniline (PANI) with semiconducting layered niobate (NbO) to form PANI/NbO hybrid materials and their reversible color change under a unique redox process under the influence of UV and/or visible light have been investigated. The in-situ polymerization of anilinium chlorides (ANI) packed in a regular orientation in a bilayer structure within the NbO interlayers led to PANI/NbO hybrid powders by heat treatment using (NH(4))(2)S(2)O(8) as the catalyst. The resulting PANI of these hybrids showed the characteristics of a fully oxidized quinoid form, i.e., pernigranine (PG). The PANI/NbO suspension in H(2)O was cast on a glass substrate to form a PANI/NbO film after evaporation of the water with a good parallel orientation of the NbO layers against the glass substrate. Upon UV light irradiation in the presence of a reductant such as MeOH, the violet-colored PANI (PG) polymers within the NbO interlayers were reduced by the NbO-induced photocatalytic reactions and led to a colorless PANI, i.e., leucoemeraldine (LE). Moreover, the resulting colorless PANI/NbO films reverted back to a blue-colored PANI, i.e., emeraldine (EM), due to oxidation by the surrounding O(2) gas. The PANI/NbO hybrid films were able to retain repetitive and reversible photoinduced patterning for over 50 cycles under such alternate UV and visible light irradiation.

Reversible redox processes of poly(anilines) in layered semiconductor niobate films under alternate UV-vis light illumination. Publishing Authors By Initials

Y Inui,T Yui,T Itoh,K Higuchi,T Seki,K Takagi,Y Inui,T Yui,T Itoh,K Higuchi,T Seki,K Takagi,

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Reversible redox processes of poly(anilines) in layered semiconductor niobate films under alternate UV-vis light illumination. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The journal of physical chemistry. B

VOLUME: 111

Page Numbers: 12162-9

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ISSN: 1520-6106

DAY: 5

MONTH: 10

YEAR: 2007

Reversible redox processes of poly(anilines) in layered semiconductor niobate films under alternate UV-vis light illumination. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Reversible redox processes of poly(anilines) in layered semiconductor niobate films under alternate UV-vis light illumination.

AFFILIATION: Department of Crystalline Materials Science, Nagoya University, Nagoya, Aichi Prefecture 464-8603, Japan.

Country: United States

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MEDLINETA: J Phys Chem B

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