在苯基苯甲酰甲基亚砜体系中高氯酸铥对高氯酸镝的荧光增强效应

合成了九种不同摩尔比的苯基苯甲酰甲基亚砜高氯酸镝、铥异核配合物,通过元素分析、稀土滴定确定其组成为(DyxTmy)L5(ClO4)3·2H2O(x∶y=1.000∶0.000,0.999∶0.001,0.995∶0.005,0.990∶0.010,0.900∶0.100,0.800∶0.200,0.700∶0.300,0.600∶0.400,0.500∶0.500,L=C6H5SOCH2COC6H5).红外光谱及摩尔电导表明,配体通过亚砜基上的氧原子与稀土离子配位,羰基氧不参与配位,三个ClO4-均在外界不参与配位.荧光光谱表明:当Tm3 的掺入量在0.001～0.300 mol之间时,对Dy3 的荧光有极强的敏化作用,且当Tm3 的掺入量为0.010 mol时,敏化强度最大,可使Dy3 荧光强度增加246%.

Enhancement Effect on Fluorescence of Tm Mixed Dysprosium Perchlorate in Phenyl-Phenacyl Sulfoxide

Nine different proportional complexes of different nuclear rare earth perchlorate (Dy3+ and Tm3+ are mixed) with phenyl-phenacyl sulfoxide (L= C6H5COCH2SOC6H5) have been synthesized and characterized. Element analysis and coordination titration studies suggest that the complexes have the composition of (DyxTmy) L5 (ClO4)3 x 2H2O (x : y = 1.000 : 0.000, 0.999 : 0.001, 0.995 : 0.005, 0.990 : 0.010, 0.900 : 0.100, 0.800 : 0.200, 0.700 : 0.300, 0.600 : 0.400, 0.500 : 0.500). IR studies indicate that the ligand is bonded with RE (III) through one oxygen atom in sulfoxyl group, and the oxygen atom in carbonyl group did not bond. The molar conductivities measured in the DMF solution indicate that three inorganic anions ClO4(-) are non-coordinated. The fluorescence emission intensity of Dy3+ complexes would be enhanced strongly by mixing Tm3+. Tm3+ has the best sensitization to the fluorescence of Dy3+ in the ratio of 0.990 : 0.010. The fluorescence intensity can be increased to 246%.