Metal ion interaction with a novel anthracene pendant-armed fluorescent molecular probe. Synthesis, characterization, and fluorescence studies

Elisabete Oliveira, Manuel Vicente, Laura Valencia, Alejandro Macías, Emilia Bértolo, Rufina Bastida, Carlos Lodeiro

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Abstract

A new scorpionate system (L) containing an emissive anthracene pendant arm, derived of O1,O7-bis(2-formylphenyl)-1,4,7-trioxaheptane and tren, has been synthesized and characterized. The sensing capability of L towards a range of metal ions has been studied. Protonation and complexation studies, using UV-Vis and fluorescent emission measurements, have been performed with alkaline and alkaline earth metal ions (M = Na(I), K(I), Li(I), Ca(II), Mg(II)), as well as transition and post-transition metal ions (M = Cr(III), Cu(II) and Zn(II), Cd(II), Hg(II) and Al(III)). An increase in the fluorescence emission (CHEF effect) was observed in methanol and in methanol/water mixtures in the presence of Cd(II) (5.0-fold), Zn(II) (4.5-fold), Cr(III) (2.0-fold) and Al(III) (1.8-fold); these results suggest a notable sensing ability of this new N3O4 ligand for these metals; these experiments were also performed in the presence of large amounts of alkaline and alkaline earth metal ions.

Original languageEnglish
Pages (from-to)2734-2743
Number of pages10
JournalInorganica Chimica Acta
Volume360
Issue number8
DOIs
Publication statusPublished - 30 May 2007

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Keywords

  • Anthracene
  • Fluorescence probes
  • Macrocycles
  • Metal complexes

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