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 journalArticle

93 Citations (Scopus)


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 languageEnglish
Pages (from-to)1195-1201
Number of pages7
JournalChemistry of Materials
Issue number7
Publication statusPublished - 2004 Apr 6


ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

Cite this