New chemosensors based on thiomacrocycle-containing coumarin-343 fluoroionophor: X-ray structures and previous results on the effect of cation binding on the photophysical properties

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Abstract

Two new emissive chemosensors based on coumarin-343 have been synthesized, and their photophysical studies conducted. L1 contains an aza-thio macrocycle ring as the chelating unit, which has great affinity for soft metal ions, whereas L2 is a parent species without macrocyclic unit. Both compounds were separated by column chromatography and characterized by elemental analysis, 1H,13C NMR, UV-vis and FAB mass spectroscopy. The X-ray structures of L1 and L2 and the supramolecular interactions in the solid state are discussed. Preliminary results on the metal-ion sensing effects of the ligands are presented. Titrations with Ag+, Pd2+ and Ni2+ have been studied by UV-vis absorption and fluorescence spectroscopy.

Original languageEnglish
Pages (from-to)1128-1134
Number of pages7
JournalInorganic Chemistry Communications
Volume12
Issue number11
DOIs
Publication statusPublished - 1 Nov 2009

Keywords

  • Coumarin-343
  • Fluorescence
  • Molecular chemosensors
  • Thio-macrocycles
  • Transition metals

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