机构地区: 暨南大学生命科学技术学院化学系
出 处: 《光谱实验室》 1999年第6期630-633,共4页
摘 要: Tb-乙二胺四亚甲基膦酸-吡啶-2-甲酸三元体系的溶液荧光呈典型的Tb(Ⅲ)离子的特征荧光,而激发峰位于310nm ,为吡啶-2-甲酸的吸光区域,表明在溶液中形成了Tb-乙二胺四亚甲基膦酸-吡啶-2-甲酸三元配合物。该三元配合物的荧光在pH 为6.0 时最强,同时随吡啶-2-甲酸含量的增加而增加,但过量的乙二胺四亚甲基膦酸的加入不影响体系的荧光。 Solution of Tb ethylenediaminetetrakis(methylphosphonic) acid 2 picolinic acid complex give characteristic fluorescence of Tb(Ⅲ) ions and the excited absorption centres at 310 nm correspoing to 2 picolinic acid, which indicated triple complex was formed. The fluorescence intensity was greatly affected by pH and was most intense at pH 6.0, it was also enhanced by addition of 2 picolinic acid, while not influenced by excess of ethylenediaminetetrakis(methylphosphonic) acid.