Emitting Complex Development And Exploration Of New Luminescent Materials

Taking the regular and irregular methods, five novel luminescent complexes (1~5) have been synthesized. Their structures have been confirmed by Single-Crystal X-ray four-circle diffraction (except complex (3)). The VU-VIS-NIR, IR and FP properties were investigated. Their formulas are presented as following:(1) Eu2(phen)2( C6H5COO)6(2) Sm(phen)2(CH3COO)3(3) Tb2(phen)2(C6H5COO)6(4) [Tb2(C6H5COO)8][Ni(phen)3](5) [Nd(oxinate)(phen)2(NO3)2]2 ( CH3OH(6) [Eu2(C6H5COO)8][Ni(phen)3](4H2O(7) Sm2(C6H5COO)4(CH3COO)2(phen)2 (8) Sm2(C6H5COO)6 (phen)2(9) [Co(phen)2(H2O)2]2(tpha)(NO3)2(2C2H5OH The excitation and emission spectra of five novel and other four complexes were mainly studied. It was found that the nine complexes are luminescent at room temperature. The emitting principle and process were also discussed. Comparing with the reference (appropriate raw materials), the fluorescence intensity of eight rare earth complexes varied to some extent: the fluorescence intensity increased sharply in the condition of fixed (max; the fluorescence intensity increased and (max changed at the same time. The relationships between the fluorescence intensity and organic ligands, metal ions as well as molecular structures were analyzed, and the major factors that affect fluorescence properties were obtained. These results are significant for us to acquire excellent emitting complexes and control their fluorescence wavelength and intensity through altering organic ligands and molecular structures. In addition, it is beneficial to design and synthesize luminous complexes of materials with changeable fluorescence wavelength.