Photoswitchable Magnetic Films: Prussian Blue Intercalated in Langmuir-Blodgett Films Consisting of an Amphiphilic Azobenzene and a Clay Mineral

Takashi Yamamoto; Yasushi Umemura; Osamu Sato; Yasuaki Einaga

doi:10.1021/cm035223d

Photoswitchable Magnetic Films: Prussian Blue Intercalated in Langmuir-Blodgett Films Consisting of an Amphiphilic Azobenzene and a Clay Mineral

Takashi Yamamoto, Yasushi Umemura, Osamu Sato, Yasuaki Einaga

Research output: Contribution to journal › Article › peer-review

97 Citations (Scopus)

Abstract

A novel photocontrollable magnetic thin film consisting of amphiphilic azobenzene cations, a smectite clay, and Prussian Blue has been designed and prepared by using the Langmuir-Blodgett method and an ion-exchange reaction. This magnetic thin film possesses a well-organized nanoscale layered structure. Reversible photoisomerization of the azobenzene chromophore realized photoswitching of the magnetization. The changes in the magnetization values were estimated to be ca. 11%. This figure was much larger than our previous system, which contained azobenzene multi-bilayered vesicles in a poly(vinyl alcohol) matrix (J. Am. Chem. Soc. 1999, 121, 3745). These larger changes in the magnetization values are due to the highly ordered structure of the hybrid multilayered films.

Original language	English
Pages (from-to)	1195-1201
Number of pages	7
Journal	Chemistry of Materials
Volume	16
Issue number	7
DOIs	https://doi.org/10.1021/cm035223d
Publication status	Published - Apr 6 2004
Externally published	Yes

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)
Materials Chemistry

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10.1021/cm035223d

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title = "Photoswitchable Magnetic Films: Prussian Blue Intercalated in Langmuir-Blodgett Films Consisting of an Amphiphilic Azobenzene and a Clay Mineral",

abstract = "A novel photocontrollable magnetic thin film consisting of amphiphilic azobenzene cations, a smectite clay, and Prussian Blue has been designed and prepared by using the Langmuir-Blodgett method and an ion-exchange reaction. This magnetic thin film possesses a well-organized nanoscale layered structure. Reversible photoisomerization of the azobenzene chromophore realized photoswitching of the magnetization. The changes in the magnetization values were estimated to be ca. 11%. This figure was much larger than our previous system, which contained azobenzene multi-bilayered vesicles in a poly(vinyl alcohol) matrix (J. Am. Chem. Soc. 1999, 121, 3745). These larger changes in the magnetization values are due to the highly ordered structure of the hybrid multilayered films.",

author = "Takashi Yamamoto and Yasushi Umemura and Osamu Sato and Yasuaki Einaga",

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TY - JOUR

T1 - Photoswitchable Magnetic Films

T2 - Prussian Blue Intercalated in Langmuir-Blodgett Films Consisting of an Amphiphilic Azobenzene and a Clay Mineral

AU - Yamamoto, Takashi

AU - Umemura, Yasushi

AU - Sato, Osamu

AU - Einaga, Yasuaki

PY - 2004/4/6

Y1 - 2004/4/6

N2 - A novel photocontrollable magnetic thin film consisting of amphiphilic azobenzene cations, a smectite clay, and Prussian Blue has been designed and prepared by using the Langmuir-Blodgett method and an ion-exchange reaction. This magnetic thin film possesses a well-organized nanoscale layered structure. Reversible photoisomerization of the azobenzene chromophore realized photoswitching of the magnetization. The changes in the magnetization values were estimated to be ca. 11%. This figure was much larger than our previous system, which contained azobenzene multi-bilayered vesicles in a poly(vinyl alcohol) matrix (J. Am. Chem. Soc. 1999, 121, 3745). These larger changes in the magnetization values are due to the highly ordered structure of the hybrid multilayered films.

AB - A novel photocontrollable magnetic thin film consisting of amphiphilic azobenzene cations, a smectite clay, and Prussian Blue has been designed and prepared by using the Langmuir-Blodgett method and an ion-exchange reaction. This magnetic thin film possesses a well-organized nanoscale layered structure. Reversible photoisomerization of the azobenzene chromophore realized photoswitching of the magnetization. The changes in the magnetization values were estimated to be ca. 11%. This figure was much larger than our previous system, which contained azobenzene multi-bilayered vesicles in a poly(vinyl alcohol) matrix (J. Am. Chem. Soc. 1999, 121, 3745). These larger changes in the magnetization values are due to the highly ordered structure of the hybrid multilayered films.

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Photoswitchable Magnetic Films: Prussian Blue Intercalated in Langmuir-Blodgett Films Consisting of an Amphiphilic Azobenzene and a Clay Mineral

Abstract

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