Selective recognition of fluoride by using a benzobisimidazolium derivative through aggregation-induced fluorescence

Dayoung Lee, Chiho Lee, Eun Jin Jun, Minji Lee, Sungnam Park, Juyoung Yoon

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A new benzobisimidazolium derivative (1) bearing four naphthalene moieties was synthesized and demonstrated as an F ion-selective fluorescent chemosensor. The fluorescence of 1 in acetonitrile (CH3CN) is significantly stronger with F and acetate (CH3CO2 ), but not with other anions (Cl, Br, I, HSO4 , and H2PO4 ). The fluorescence of 1 is enhanced selectively with F in the presence of a small amount of water. Our DFT calculations indicate that the electrostatic interactions between the positively charged benzobisimidazolium moieties and F play an important role in the formation of stable aggregates. The formation of stable aggregates of 1 with F in CH3CN is a key step for the selective sensing of F, and the fluorescence of the aggregates is further enhanced in a mixture of 95% CH3CN and 5% water, which can be attributed to the aggregation-induced emission.

Original languageEnglish
Pages (from-to)476-479
Number of pages4
JournalChemistryOpen
Volume6
Issue number4
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • Aggregation-induced emission
  • Chemosensors
  • Fluorescent probes
  • Fluoride
  • Imidazolium

ASJC Scopus subject areas

  • Chemistry(all)

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