Turn-on fluorescent chemosensor for Hg²⁺ based on multivalent rhodamine ligands

Int J Mol Sci. 2012 Dec 7;13(12):16822-32. doi: 10.3390/ijms131216822.

Abstract

Rhodamine-based fluorescent chemosensors 1 and 2 exhibit selective fluorescence enhancement to Fe3+ and Hg2+ over other metal ions at 580 nm in CH(3)CN/H(2)O (3/1, v/v) solution. Bis(rhodamine) chemosensor 1, under optimized conditions (CH(3)CN/HEPES buffer (0.02 M, pH = 7.0) (95/5, v/v)), shows a high selectivity and sensitivity to Hg2+, with a linear working range of 0-50 μM, a wide pH span of 4-10, and a detection limit of 0.4 μM Hg2+.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biosensing Techniques / instrumentation
  • Biosensing Techniques / methods*
  • Ferric Compounds / chemistry
  • Fluorescence
  • Fluorescent Dyes / chemistry
  • Heavy Ions
  • Ligands
  • Limit of Detection
  • Mercury / analysis*
  • Rhodamines / chemistry*
  • Spectrometry, Fluorescence

Substances

  • Ferric Compounds
  • Fluorescent Dyes
  • Ligands
  • Rhodamines
  • Mercury