One-pot synthesis of a red-fluorescent chemosensor from an azacrown, phloroglucinol and squaric acid: A simple in-solution construction of a functional molecular device.

Oguz U., Akkaya E.

TETRAHEDRON LETTERS, vol.38, no.25, pp.4509-4512, 1997 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 38 Issue: 25
  • Publication Date: 1997
  • Doi Number: 10.1016/s0040-4039(97)00916-7
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.4509-4512
  • Middle East Technical University Affiliated: No


A long wavelength fluorescent, squaraine-based chemosensor has been synthesized in one step from commercially available precursors. The resulting squaraine derivative absorbs maximally at 635 nm (epsilon = 260,000) and the emission peak is at 665 nm. This azacrown-appended squaraine signals alkaline and earth-alkaline metal ions in millimolar concentrations in acetonitrile. (C) 1997 Elsevier Science Ltd.