(Oligo)thienyl-imidazo-benzocrown ether derivatives: Synthesis, photophysical studies and evaluation of their chemosensory properties

Rosa M. F. Batista, E. Oliveira, Susana P. G. Costa, C. Lodeiro, M. M. M. Raposo

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

A series of novel (oligo)thienyl-imidazo-benzocrown ethers were synthesised through a simple method and evaluated as fluorimetric chemosensors for transition metal cations. Interaction with Ni2+, Pd2+, and Hg2+ in ACN/DMSO solution (99:1) was studied by absorption and emission spectroscopy. Chemoselectivity studies in the presence of Na + were also carried out and a fluorescence enhancement upon chelation (CHEF) effect was observed following Hg2+ complexation. Considering that most systems using fluorescence spectroscopy for detecting Hg2+ are based on the complexation enhancement of the fluorescence quenching (CHEQ) effect, the present work represents one of the few examples for sensing of Hg2+ based on a CHEF effect. © 2011 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)2470-2478
Number of pages9
JournalTalanta
Volume85
Issue number5
DOIs
Publication statusPublished - 15 Oct 2011

Keywords

  • (Oligo)thiophene
  • Benzo-15-crown-5 ether
  • CHEF effect
  • Fluorescent chemosensors
  • Hg2+
  • Imidazole
  • Pd2+
  • Absorption and emission spectroscopy
  • Benzo-15-crown-5
  • Chemo-selectivity
  • Chemo-sensors
  • Ether derivatives
  • Fluorescence enhancement
  • Fluorescence quenching
  • Fluorimetric
  • Photophysical studies
  • SIMPLE method
  • Transition metal cations
  • Crown ethers
  • Emission spectroscopy
  • Ethers
  • Fluorescence
  • Fluorescence spectroscopy
  • Organic compounds
  • Palladium
  • Physiology
  • Thiophene
  • Transition metals
  • Mercury (metal)

Fingerprint

Dive into the research topics of '(Oligo)thienyl-imidazo-benzocrown ether derivatives: Synthesis, photophysical studies and evaluation of their chemosensory properties'. Together they form a unique fingerprint.

Cite this