Fluorescence color modulation by intramolecular and intermolecular π-π interactions in a helical zinc(II) complex

Shin Mizukami, Hirohiko Houjou, Kenta Sugaya, Emiko Koyama, Hideo Tokuhisa, Takeshi Sasaki, Masatoshi Kanesato

Research output: Contribution to journalArticle

223 Citations (Scopus)

Abstract

When a fluorescent compound shows unique optical properties, an elucidation of the mechanism may lead to an important development of novel sensing strategies. A helical 3,3′-di-tert-butylsalen-zinc(II) complex, [Zn 2L12], has a red-shifted fluorescence as compared to that of [ZnL22], a half-structured mononuclear complex of [Zn2L12]; in addition, [Zn 2L12] exhibits a fluorescence color change from green to light blue under external stimulations. We investigated the origins of these phenomena by spectroscopy, fluorescence lifetime measurement, fluorescence microscopy, X-ray powder diffraction, and X-ray single-crystal analysis. From the experimental data, we concluded that intramolecular and intermolecular π-π interactions are critical elements that determine the shifts of the fluorescence to a longer wavelength.

Original languageEnglish
Pages (from-to)50-56
Number of pages7
JournalChemistry of Materials
Volume17
Issue number1
DOIs
Publication statusPublished - 2005 Jan 11
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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