An aqueous friendly chemosensor derived from vitamin B₆ cofactor for colorimetric sensing of Cu²⁺ and fluorescent turn-off sensing of Fe³⁺

Spectrochim Acta A Mol Biomol Spectrosc. 2016 Jan 15:153:393-6. doi: 10.1016/j.saa.2015.08.051. Epub 2015 Sep 3.

Abstract

Chemosensor L derived from vitamin B6 cofactor pyridoxal-5-phosphate was investigated for the selective detection of Cu(2+) and Fe(3+) in aqueous medium. Sensor L formed a 1:1 complex with Cu(2+) and displays a perceptible color change from colorless to yellow brown with the appearance of a new charge transfer band at ~450 nm. In contrast, the fluorescence of L was quenched selectively in the presence of Fe(3+) without any interference from other metal ions including Cu(2+).

Keywords: Colorimetric sensor; Cu(2+); Fe(3+); Fluorescent sensor; Vitamin B(6) cofactor.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Calibration
  • Coenzymes / analysis*
  • Colorimetry / methods*
  • Copper / analysis*
  • Iron / analysis*
  • Quantum Theory
  • Spectrometry, Fluorescence
  • Spectrophotometry, Ultraviolet
  • Vitamin B 6 / analysis*
  • Water / chemistry*

Substances

  • Coenzymes
  • Water
  • Copper
  • Vitamin B 6
  • Iron