Construction And Luminescence Properties Of Lanthanide Complexes With Multi-Benzene Schiff Base Ligands

In this thesis,four new multi-benzene Schiff base ligands were synthesized from the reactions of aldehydes?i.e.2-hydroxy-3-methoxybenzaldehyde and5-Bromo-2-hydroxy-3-methoxybenzaldehyde?and diamines containing benzene rings?i.e.1,2-bis?o-aminophenoxy?ethane,4,4'-oxydianiline and{[4-?2-amino-ethyl?-phenoxy]-phenoxy}-aniline?.The structures of these multi-benzene Schiff base ligands were confirmed by ¹HNMR spectra.Six series of lanthanide complexes were synthesized from the reactions of multi-benzene Schiff base ligands with metal salts,including two di-nuclear complexes Cd-Ln?Ln=La and Nd?,two different series of tri-nuclear complexes Cd-Ln₂?Ln=La,Pr and Nd?,seven quad-nuclear complexes Ni₂-Ln₂?Ln=Yb and Er?and Zn₂-Ln₂?Ln=Nd,Yb and Er?,three nine-nuclear complexes Ln₉?Ln=Nd,Yb and Gd?.These lanthanide complexes were characterized by UV,X-ray diffractometer,thermogravimetry and elemental analysis.The luminescence properties of these lanthanide complexes,as well as their fluorescent response towards metal ions and explosives,were studied in this thesis.