New gallium(III) corrole complexes as colorimetric probes for toxic cyanide anion

Carla I. M. Santos, Elisabete Oliveira , Joana F. B. Barata, M. Amparo F. Faustino, Jose A. S. Cavaleiro, M. Graça P. M. S. Neves, Carlos Lodeiro

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

Demand for new colorimetric sensors for toxic anions has widely increased in the last ten years, becauseit is an inexpensive technique, in which the analyte is naked-eye detectable. Regarding this issue, twonew corrole derivatives 2 and 3 were successfully synthetized and characterized by elemental analysis,1H and 19F-NMR, MALDI-TOF-MS, UV–Vis absorption and emission spectra. b-Vinyl-corrole 1 wasprepared by the Wittig reaction of b-formyl-corrole with phosphorus ylide. Subsequent treatment ofb-vinyl-corrole with dimethyl acetylenedicarboxylate afforded compounds 2 and 3. The sensorial abilityof the two new corrole derivatives towards fluoride, cyanide, acetate and phosphate anions was carriedout by absorption and emission spectroscopy. Compound 2 shows to be colorimetric to cyanide, whereasa change of colour from green to colourless was visualized. In addition the highest association constantswere obtained for compounds 2 and 3 in the presence of cyanide that are able to quantify a minor amountof cyanide (ca. 1.00 lM).
Original languageEnglish
Pages (from-to)148-154
Number of pages7
JournalInorganica Chimica Acta
Volume417
DOIs
Publication statusPublished - Jun 2014

Keywords

  • Chemosensor
  • Colorimetric
  • Corrole
  • Cyanide
  • Fluorescence

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