UV-Induced formation of [Fe(bpy)3]2+ complex and its confinement into silica fine particles

Chikashi Nakanishi, Saori Ikeda, Tetsuhiko Isobe, Mamoru Senna

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Silica fine particles in a single or sub-micrometer regime, containing FeCl3 and 2,2′-bipyridine (bpy), were prepared by utilizing reverse micellar method. Formation of tris-bpy iron(II) ([Fe(bpy)3]2+) complex was induced in the silica fine particles by UV irradiation at 365 nm. The starting micellar solution was obtained by an injection of 0.04 cm3 HCl aqueous solution into 5 cm3 tetraethyl orthosilicate (TEOS)/cyclohexane (2 cm3/3 cm3) mixed solution containing 4-14 vol% of nonionic surfactant, polyoxyethylene(5) nonylphenyl ether (NP-5). Size of the silica particles was regulated by the concentration of NP-5.

Original languageEnglish
Pages (from-to)103-106
Number of pages4
JournalJournal of Sol-Gel Science and Technology
Issue number1-3
Publication statusPublished - 2003 Jan 1


  • Complex formation
  • Photo-sensitivity
  • Reverse micelle method
  • Silica fine particles

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • General Chemistry
  • Biomaterials
  • Condensed Matter Physics
  • Materials Chemistry


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