First observation of ionic π-hydrogen bonds; vibrational spectroscopy of dihydrated naphthalene anion (Nph-(H2O)2)

Hiroshi Kawamata, Toshihiko Maeyama, Naohiko Mikami

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Hydrated structure of Nph-(H2O)2 was investigated using infrared (IR) spectroscopy. Among OH stretching vibrations, three π-hydrogen bonds to anionic naphthalene ring, namely ionic π-hydrogen (iπH) bonds, and an interwater hydrogen bond were observed. It allowed us to elucidate the geometrical structure of Nph-(H2O)2. The unstable naphthalene bare anion was stabilized through the iπH bonds with the water dimer on its ring, forming the one-sided structure. Besides, the intensity of the aromatic CH stretching modes was found to be enhanced upon the electron attachment without significant lowering of their frequencies.

Original languageEnglish
Pages (from-to)535-541
Number of pages7
JournalChemical Physics Letters
Volume370
Issue number3-4
DOIs
Publication statusPublished - 2003 Mar 14

ASJC Scopus subject areas

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

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