Synthesis, Spectroscopy Studies, and Theoretical Calculations of New Fluorescent Probes Based on Pyrazole Containing Porphyrins forZn(II), Cd(II), and Hg(II) Optical Detection

Nuno M. M. Moura, Cristina Nunez, Sergio M. Santos, M. Amparo F. Faustino, Jose A. S. Cavaleiro, M. Graça P. M. S. Neves, José Luis Capelo, Carlos Lodeiro

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

New pyrazole−porphyrin conjugates were successfully prepared froma reaction of β-porphyrin−chalcone derivatives with phenylhydrazine in acetic acidfollowed by an oxidative step. This fast and efficient synthetic approach provided theexpected compounds in yields up to 82%. The sensing ability of the new porphyrin−pyrazole derivatives to detect the metal ions Ag+, Na+, K+, Mg2+, Ca2+, Ni2+, Cu2+,Zn2+, Cd2+, Hg2+, Pb2+, and Cr3+ was studied by spectrophotometric and spectrofluorimetric titrations. In the presence of Zn2+,the conjugates exhibit changes in the emission spectra that are desired for a ratiometric-type fluoroionophoric detection probe.The studies were extended to gas phase, where the pyrazole−porphyrin conjugates show ability to sense metal ions with highselectivity toward Cu2+ and Ag+, and in poly(methyl methacrylate) doped films with promising results for Zn2+ detection.
Original languageEnglish
Pages (from-to)6149-6158
JournalInorganic Chemistry
Volume53
Issue number12
DOIs
Publication statusPublished - 16 Jun 2014

Keywords

  • ION
  • CHEMOSENSORS
  • SENSOR
  • MERCURY
  • CU2+
  • DERIVATIVES
  • LUMINESCENCE
  • RECOGNITION
  • COMPLEXES
  • PLATFORM

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