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噻吩甲酰三氟丙酮(TTA)、二苯甲酰甲烷(DBM)等β-二酮类试剂与稀土元素形成络合物后,其超灵敏跃迁谱带有显著的增强。当有第二配位体参与形成的三元稀土异配位络合物,其吸收谱带的强度和形状又有新的变化。鉴于导数分光光度法对锐形谱带有较高的放大能力和分辨能力,因而用导数分光光度法有可能提高单一稀土的检测灵敏度和选择性。我们在系统探索各单一稀土与TTA和DBM以及吡啶类有机碱
After the formation of complexes of β-diketones, such as thio-formyltrifluoroacetone (TTA) and dibenzoylmethane (DBM), with rare earth elements, their hyper-sensitive transition bands are significantly enhanced. When the second ligand is involved in the formation of ternary rare-earth hetero-coordinate complexes, there is a new change in the intensity and shape of the absorption band. Derivative spectrophotometry has the potential to improve the detection sensitivity and selectivity of a single rare earth, due to its high magnification and resolution of sharp spectral bands by derivative spectrophotometry. We are systematically exploring each single rare earth with TTA and DBM as well as pyridine organic bases