Synthesis, structure, photophysics, electrochemistry, and ion-binding studies of ruthenium(II) 1,10-phenanthroline complexes containing thia-, selena-, and aza-crown pendants

Inorg Chem. 2007 Feb 5;46(3):720-33. doi: 10.1021/ic061507z.

Abstract

A series of ruthenium(II) diimine complexes containing thia-, selena- and aza-crowns derived from 1,10-phenanthroline have been synthesized and characterized, and their photophysics and electrochemistry were studied. Their interaction with metal ions was investigated by UV-vis, luminescence, and 1H NMR spectroscopy. The crystal structures of [Ru(bpy)2(L1)](PF6)2, [Ru(bpy)2(L2)](ClO4)2, [Ru(bpy)2(L3)](ClO4)2, and [Ru(bpy)2(L4)](ClO4)2 have been determined. The luminescence properties of [Ru(bpy)2(L1)](ClO4)2 were found to be sensitive and selective toward the presence of Hg2+ ions in an acetonitrile solution. The addition of alkaline-earth metal ions, Zn2+, Cd2+, and Hg2+ ions, to the solution of [Ru(bpy)2(L6)](ClO4)2 in acetonitrile gave rise to large changes in the UV-vis and emission spectra. The binding of metal ions to [Ru(bpy)2(L6)](ClO4)2 was found to cause a strong enhancement in the emission intensities of the complex, with high specificity toward Hg2+ ions.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Crystallization
  • Luminescence*
  • Magnetic Resonance Spectroscopy
  • Metals, Heavy
  • Molecular Structure
  • Phenanthrolines / chemistry*
  • Ruthenium Compounds / chemical synthesis
  • Ruthenium Compounds / chemistry*
  • Solutions
  • Spectrum Analysis
  • Structure-Activity Relationship

Substances

  • Metals, Heavy
  • Phenanthrolines
  • Ruthenium Compounds
  • Solutions