The assembly of “S3N”-ligands decorated with an azo-dye as potential sensors for heavy metal ions†
Abstract
An “S3N-ligand azo-dye” conjugate has been synthesised with a view to the development of a sensor for heavy metal ions. Complexation of this system with Ag(I), Hg(II) and Cu(II) salts has been investigated and an X-ray structure has been obtained for a Hg(II) complex. Complexation of the conjugated dye to these metals results in a bathochromic shift in the absorption maximum of the azo dye, an effect which is most pronounced for Cu(II).