Preparation of Aminophenol Type Bidentate Schiff Base Ligand-Functionalized Polysulfone and Photoluminescence Property of Complexes Constituted by Macromolecular Ligand and Eu(Ⅲ) Ion

The Friedel-Crafts alkylation reaction was carried out between polysulfone (PSF) and 4-(chloromethyl)benzaldehyde (CMBA),and benzaldehyde (BA) as a group was bonded on the side chain of PSF,resulting in the modified polysulfone PSF-BA,and the effects of the main factors on the Friedel-Crafts alkylation reaction between PSF and CMBA were examined.Subsequently,the condensation reaction between the aldehyde group of PSF-BA and the amino group of ortho-aminophenol (OAP) or meta-aminophenol (MAP) was performed,and the synchronous synthesis and bonding of aminophenol type bidentate Schiff base ligand on the side chain of PSF were realized,obtaining two functional PSFs,PSF-BAOA and PSF-BAMA.The chemical structures of the functional PSFs were characterized by FT-IR and ¹H-NMR spectra.Finally,the two macromolecular ligands,PSF-BAOA and PSF-BAMA,were coordinated with Eu(Ⅲ) ion,respectively,and two binary photoluminescence polymer-rare earth complexes,PSF-(BAOA)₃-Eu(Ⅲ) and PSF-(BAMA)₃-Eu(Ⅲ) were prepared.Results showed that the polarity of the solvent was beneficial to the Friedel-Crafts alkylation reaction between PSF and CMBA,and N,N-dimethylacetamide was a suitable solvent,the appropriate temperature was 70℃.Both PSF-BAOA and PSF-BAMA could effectively sensitize the fluorescence emission of Eu(Ⅲ) ion,and the two binary polymer-rare earth complexes emitted strong characteristic fluorescence of Eu(Ⅲ) ion.