Vanadate speciation -- Monodentate ligands of vanadate -- Aqueous reactions of vanadate with multidentate ligands -- Coordination of vanadate by hydrogen peroxide and hydroxylamines -- Reactions of peroxovanadates -- Aqueous reactions and NMR spectroscopy of hydroxamidovanadates -- Reactions of oligovanadates -- Influence of ligand properties on product structure and reactivity -- Vanadium in biological systems -- The influence of vanadium compounds on biological systems -- Model systems and technological development -- Preparation, characterization and battery applications of silver vanadium oxide materials.