【摘要】 以氟化硼络合二吡咯甲川类(BODIPY)染料为荧光团,二(2-羟基乙基)亚胺为识别体合成了一种新的对Pb2+具有高选择性的Pb2+荧光探针。在HEPES缓冲溶液(pH7.4)中,当Pb2+浓度达到1.0×10-5mol/L时肉眼可观察到探针荧光强度明显增强;当Pb2+浓度达到3.0×10-4mol/L时,探针荧光强度增大20倍以上,且识别作用不受其它金属离子(Na+、Mg2+、Ca2+、Cu2+、Fe2+、Hg2+、Ag+、Cd2+、Cr3+、Fe3+)干扰。Pb2+浓度在0.2×10-5～5.0×10-5mol/L范围内,探针荧光强度与Pb2+浓度有较好的线性关系,相关系数为0.998,检出限为0.2μmol/L。更多还原

【Abstract】 Taking BODIPY(4,4-difluoro-4-bora-3a,4a-diaza-s-indacene) dye as a fluorophore,dihydroxydiethylamine as a receptor,a novel fluorescent probe for Pb2+detection was synthesized with good selectivity.In HEPES(pH=7.4) buffer,when the concentration of Pb2+ reached 1.0×10-5 mol/L,the fluorescent intensity of the probe was enhanced obviously even to be observed with naked eyes;when the concentration reached 3.0×10-4 mol/L,the fluorescent intensity enhanced over 20-fold.In addition,other metal ions(Na+,Mg2+,Ca2+,Cu2+,Fe2+,Hg2+,Ag+,Cd2+,Cr3+,Fe3+) didn′t interfere with the probe′s recognition for Pb2+.When the concentration of Pb2+ was in the range of0.2×10-5-5.0×10-5 mol/L,there was a good linearity between the fluorescence intensity of the probe and the concentration of Pb2+ with a correlation coefficient of 0.998,and the detection limit was 0.2 μmol/L.更多还原