Mid-infrared vibrational spectroscopic characterization of 5,6-dihydroxyindole and eumelanin derived from it

Ryosuke Hyogo, Atsushi Nakamura, Hidekazu Okuda, Kazumasa Wakamatsu, Shosuke Ito, Takayuki Sota

Research output: Contribution to journalArticle

6 Citations (Scopus)


Mid-infrared vibrational spectroscopic study has been made on 5,6-dihydroxyindole (DHI) and DHI-derived eumelanin. It has been revealed for DHI monomer that measured infrared absorption spectrum is well reproduced by that predicted from ab initio calculations. Thus, vibrational modes of DHI monomer causing dominant absorption bands have been successfully assigned. It has been also reconfirmed that DHI-derived eumelanin includes indolequinone and/or quinone methide units in addition to DHI units.

Original languageEnglish
Pages (from-to)211-216
Number of pages6
JournalChemical Physics Letters
Issue number4-6
Publication statusPublished - 2011 Dec 7


ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this