A highly selective and sensitive boronic acid-based sensor for detecting Pd2+ ion under mild conditions

Bioorg Med Chem Lett. 2020 Sep 1;30(17):127397. doi: 10.1016/j.bmcl.2020.127397. Epub 2020 Jul 10.

Abstract

Herein, a boronic acid-based sensor was reported selectively to recognize Pd2+ ion. The fluorescence intensity increased 36-fold after sensor binding with 2.47 × 10-5 M of Pd2+ ion. It was carried out in the 99% aqueous solution for binding tests, indicating sensor having good water solubility. In addition, it is discernible that Pd2+ ion turned on the blue fluorescence of sensor under a UV-lamp (365 nm), while other ions (Ag+, Al3+, Ba2+, Ca2+, Cr2+, Cd2+, Co2+, Cs2+, Cu2+, Fe2+, Fe3+, K+, Li+, Mg2+, Mn2+, Na+, Ni2+ and Zn2+) did not show the similar change. Furthermore, sensor has a low limit of detection (38 nM) and high selectivity, which exhibits the potential for the development of Pd2+ recognition in practical environments.

Keywords: Boronic acid; Fluorescence sensor; Mild conditions; Pd(2+) ion.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Boronic Acids / chemistry*
  • Fluorescent Dyes / chemistry
  • Hydrogen-Ion Concentration
  • Ions / chemistry
  • Lead / analysis*
  • Limit of Detection
  • Reproducibility of Results
  • Solubility
  • Spectrometry, Fluorescence / methods*

Substances

  • Boronic Acids
  • Fluorescent Dyes
  • Ions
  • Lead