Synthesis of picolinate-iron(III) compounds through an aqueous solution process

Junki Sato, Makoto Kobayashi, Hideki Kato, Eunsang Kwon, Masato Kakihana

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


A novel picolinate-iron(III) compound, Fe(C6H4NO2)2(OH) (1), was synthesized from an aqueous solution of a picolinate-iron(II) complex. Compound 1 was obtained by a thermal treatment of the picolinate-iron complex aqueous solution, whose pH was adjusted to 37, containing more than twice molar picolinic acid (Hpa) to Fe at 353K for 72 h. When the iron aqueous solution in the presence of more than six times molar Hpa to Fe at pH 25 was heated, Fe(C6H4NO2)3-H2O (2) appeared. Millimeter-sized yellow-green single crystals of 2 could be obtained by the heat treatment of the picolinate-iron aqueous solution, whose pH was adjusted to 3, with Fe2+:Hpa = 1:10 at 373K for 72 h. Formation mechanism of 1 and 2 was also discussed through investigations of relationship between synthesis conditions and products. Our approach opens a promising new route for preparation of precursors for synthesis of high functional ceramics and development of new organicinorganic hybrids.

Original languageEnglish
Pages (from-to)751-755
Number of pages5
JournalJournal of the Ceramic Society of Japan
Issue number1441
Publication statusPublished - 2015


  • Aqueous solution
  • Complex
  • Heterocyclic compound
  • Iron
  • Picolinic acid
  • Precursor

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry


Dive into the research topics of 'Synthesis of picolinate-iron(III) compounds through an aqueous solution process'. Together they form a unique fingerprint.

Cite this