The synthesis and characterisation of Schiff-base ligands as receptors for detection of heavy metal ions

Abstract

In this thesis, four ligands have been designed and synthesised incorporating different functional groups. All four ligands were fully characterised by 1H NMR, 13C NMR, powder X-ray diffraction (PXRD), ESI-HRMS, FT-IR spectroscopy, scanning electron microscope-electron dispersive spectroscopy (SEM-EDS), UV-Vis spectroscopies as well as single crystal X-ray diffraction for three of them. In addition, two crystals of metal complexes were prepared and characterised in solid state. On the other hand, the stability constants of each ligand with a range of metal ions were determined by UV-vis titration using Benesi-Hildebrand method at room temperature in MeOH:H2O (v/v 1:1, HEPES pH = 7) solution. Metal complexes in stoichiometric ratio either M : L (1:1) or (1:2) were found in solution. One new ligand is selected as a potential receptor for detection of Cu2+.

Date of Award	2017
Original language	English