Synthesis And Fluorescence Properties Of Benzoyl Trifluoroacetone Class Spiral Rare Earth Complexes

In this paper, as the skeleton of1-phenyl-4,4,4-trifluoro-1,3-butanedione (BTA),three novel bis-β-diketone,3,3′-bis(4,4,4-trifluoro-1,3-dioxobutyl) diphenyl ether(OBTA),4,4′-bis(4,4,4-trifluoro-1,3-dioxobutyl)(phenoxy)-1,1’-binaphthalene (BTPB),N,N’–bis(4-(4,4,4-butyl-3-oxygen generation acyl)benzamide)(1S,2S)cyclohexane(CDBTA), has been designed and synthesized. The three ligands were reacted withrare-earth ions (Ln: ligand=2:3), respectively, three series nine helical complexes weresynthesized. This thesis consists of following three parts:1. Synthesis of benzoyl trifluoroacetone type oxygen atom-bridged β-diketoneligand3,3’-bis(4,4,4-trifluoro-1,3-dioxo-butyl) phenyl ether (OBTA) and rare earthcomplexes Ln2(OBTA)3(H2O)2(Ln=Eu, Gd). All complexes were characterized by avariety of spectroscopic techniques. Single crystal X-ray diffraction analysis showedthat OBTA rare earth complexes is made up of three ligands and two single moleculecompounds of rare earth ions, and three ligand spiral wound two metal centers formedthree spiral structure. The research of OBTA ligand complexes luminescence propertiesshows that effective sensitized luminescence of rare earth ions, it is a good sensitizer ofsensitization of rare earth.2. Synthesis of benzoyl trifluoroacetone class binaphthol-bridged β-diketone ligand4,4’-bis(4,4,4-trifluoro-1,3-dioxo-butyl)phenoxy-1,1’-binaphthyl (BTPB) and rare earthcomplexes Ln2(BTPB)3(H2O)2(Ln=Sm, Eu, Gd). All complexes were characterized bya variety of spectroscopic techniques. Luminescent properties of complexes displayBTPB ligands can effectively sensitized luminescence of samarium ions. Interestingly,samarium complexes exhibit excitation wavelength dependence of the concentrationand the white light emission.3. Synthesis of benzoyl trifluoroacetone cyclohexanediamine chiral bridgedbis-β-diketone ligand N,N’-bis(4-(4,4,4-trifluoro-3-oxo-butyryl)benzamide)(1S,2S)- cyclohexane (CDBTA) and rare earth complexes Ln2(CDBTA)3(H2O)2(Ln=Eu, Gd).Chiral cyclohexanediamine introduced efficiently control the twisting direction of thehelical complexes formed single chiral helix. And the europium complex circularpolarization spectra showed characteristic Eu3+ions circularly polarized emission peaks.Circularly polarized fluorescence properties of europium complexes display with acircularly polarized fluorescence light conditions.