A Schiff-based sensor with turn-on fluorescence for selective detection of Hg2+

Luminescence. 2014 Sep;29(6):698-701. doi: 10.1002/bio.2592.

Abstract

A simple Schiff-base colorimetric receptor 1 was prepared. It exhibits an ‘off–on-type’ mode with high sensitivity in the presence of Hg2+. The change in color is very easily observed by the naked eye in the presence of Hg2+, whereas other metal cations do not induce such a change. A Job plot indicated a 1 : 1 complexation stoichiometry between receptor 1 and Hg2+. The association constant for 1–Hg2+ in Tetrahydrofuran (THF) was determined to be 1.3 × 10(9)M-1 using a Hill plot.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Colorimetry
  • Fluorescence*
  • Fluorescent Dyes / chemical synthesis
  • Fluorescent Dyes / chemistry*
  • Magnetic Resonance Spectroscopy
  • Mercury / analysis*
  • Molecular Structure
  • Naphthalenes / chemistry
  • Pyridines / chemistry
  • Schiff Bases / chemical synthesis
  • Schiff Bases / chemistry*
  • Spectrophotometry, Ultraviolet

Substances

  • 2-hydroxynaphthalene-1-carboxaldehyde
  • Fluorescent Dyes
  • Naphthalenes
  • Pyridines
  • Schiff Bases
  • Mercury
  • 2,6-diaminopyridine