A Novel Ruthenium(II) Polypyridyl Complex Bearing 1,8-Naphthyridine as a High Selectivity and Sensitivity Fluorescent Chemosensor for Cu2+ and Fe3+ Ions

Molecules. 2019 Nov 7;24(22):4032. doi: 10.3390/molecules24224032.

Abstract

A novel ruthenium(II) polypyridyl complex bearing 1,8-naphthyridine was successfully designed and synthesized. This complex was fully characterized by EI-HRMS, NMR, and elemental analyses. The recognition properties of the complex for various metal ions were investigated. The results suggested that the complex displayed high selectivity and sensitivity for Cu2+ and Fe3+ ions with good anti-interference in the CH3CN/H2O (1:1, v/v) solution. The fluorescent chemosensor showed obvious fluorescence quenching when the Cu2+ and Fe3+ ions were added. The detection limits of Cu2+ and Fe3+ were 39.9 nmol/L and 6.68 nmol/L, respectively. This study suggested that this Ru(II) polypyridyl complex can be used as a high selectivity and sensitivity fluorescent chemosensor for Cu2+ and Fe3+ ions.

Keywords: 1,8-naphthyridine; Cu2+; Fe3+; Ru(II) polypyridyl complex; chemosensor; fluorescence.

MeSH terms

  • Coordination Complexes* / chemical synthesis
  • Coordination Complexes* / chemistry
  • Copper / analysis*
  • Fluorescent Dyes* / chemical synthesis
  • Fluorescent Dyes* / chemistry
  • Iron / analysis*
  • Naphthyridines* / chemical synthesis
  • Naphthyridines* / chemistry
  • Ruthenium / chemistry*
  • Spectrometry, Fluorescence

Substances

  • Coordination Complexes
  • Fluorescent Dyes
  • Naphthyridines
  • Copper
  • Ruthenium
  • Iron