Synthesis, Characterization And Luminescent Properties Of Rare Earth Macromolecular Complexes With Polymeric Carboxylic Acids

The synthesis, characterization and fluorescence of polymethacrylic acid, poly(styrene-co-methacrylic acid) and (Z)-4-(4-Methoxyphenoxy)-4-Oxobut-2-Enoic Acid and their Ln(III) complexes have been studied in this thesis. This paper consists of four parts as follows:1. A brief review of the study for metal macromolecular complexes (MMC) has been given.2. Rare earth complexes with Polymethacrylic acid (Ln-PMAA, Fig a) have been synthesized, and the characterization of ligand and complexes have studied detailed.3. Rare earth complexes with poly(styrene-co-methacrylic acid)( Ln-ST-co-MAA, Fig b) have been synthesized, and the characterization of ligands and complexes have studieddetailed.4. The ligand of (Z)-4-(4-Methoxyphenoxy)-4-Oxobut-2-Enoic Acid (MOEA, Fig c) and its rare earth complexes (Ln-MOEA, Fig d) have been synthesized, and the characterization of ligand and complexes have studied. These rare earth complexes have been studied by means of elemental analysis, IR spectra, thermal analysis, X-ray diffraction (XRD), differential scanning calorimetric (DSC), mass spectroscopy (MS) and nuclear magnetic resonance spectroscopy (NMR).The results show that these two series rare earth macromolecular complexes are structurally specific, insoluble in most organic solvents and thermally stable.The ligand of (Z)-4-(4-Methoxyphenoxy)-4-Oxobut-2-Enoic Acid could soluble in acetone, methanol and ethyl acetate, etc. The complexes of (Z)-4-(4-Methoxyphenoxy)-4-Oxobut-2-Enoic Acid with lanthanide could soluble in DMF and DMSO. In addition, we confirmed the structure of the ligand and the complexes based on the results of elemental analysis, IR spectra and ¹³C NMR.The results of fluorescence spectra indicated that all of the rare earth complexes emit characteristic fluorescence of rare earth and exhibition intense fluorescence emission.