Metal-ion permeation in congested nanochannels: The exposure effect of Ag + ions on the phosphorescent properties of a gold(I)-pyrazolate complex that is confined in the nanoscopic channels of mesoporous silica

Hendrik O. Lintang, Kazushi Kinbara, Takashi Yamashita, Takuzo Aida

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

An organometallic/silica nanocomposite of a 1D cylindrical assembly of a trinuclear gold(I)-pyrazolate complex ([Au 3Pz 3]) that was confined inside the nanoscopic channels of hexagonal mesoporous silica ([Au 3Pz 3]/silica hex), emitted red light with a luminescence center at 693 nm upon photoexcitation at 276 nm owing to a Au I-Au I metallophilic interaction. When a film of [Au 3Pz 3]/silica hex was dipped into a solution of Ag + in tetrahydrofuran (THF), the resulting nanocomposite material (Agat[Au 3Pz 3]/silica hex) emitted green light with a new luminescence center at 486 nm, which was characteristic of a Au I-Ag I heterometallic interaction. Changes in the emission/excitation and XPS spectra of Agat[Au 3Pz 3]/ silica hex revealed that Ag + ions permeated into the congested nanochannels of [Au 3Pz 3]/silica hex, which were filled with the cylindrical assembly of [Au 3Pz 3].

Original languageEnglish
Pages (from-to)2068-2072
Number of pages5
JournalChemistry - An Asian Journal
Volume7
Issue number9
DOIs
Publication statusPublished - 2012 Sep 1

Keywords

  • mesoporous materials
  • nanostructures
  • phosphorescence
  • silicates
  • silver

ASJC Scopus subject areas

  • Biochemistry
  • Organic Chemistry

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