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用电化学和光谱方法在ｐ Ｈ＝ ７５ 的三羟甲基氨基甲烷溶液中，研究了胆红素与镧系离子由轻稀土 Ｌａ３ ＋ 离子到重稀土 Ｙｂ３ ＋ 离子的作用机理，并同胆红素与铜离子的作用进行对比发现，镧系稀土离子从 Ｌａ３ ＋ 到 Ｙｂ３ ＋ 与胆红素的配位能力随原子序数的增加和原子半径的减小稍有不同，但均形成１∶１ 立体结构的配合物，与 Ｃｕ２ ＋ 离子和胆红素形成１∶１ 平面结构的配合物不同，且该类配合物在所研究的电位窗口－ ０ ．４ ～－ １ ．６ Ｖ 内，表现为非电活性。同时配合物的形成又促进了胆红素的氧化，最终氧化产物为稀土胆汁红紫素配合物。该氧化产物在滴汞电极上于－ ０ ．６５ Ｖ（ｖｓ ． Ａｇ／ Ａｇ Ｃｌ） 处产生－ ２ｅ 不可逆吸附波。
The mechanism of action of bilirubin and lanthanide ions from light rare earth La3 + ions to heavy rare earth Yb3 + ions was studied by electrochemistry and spectroscopy in a solution of p-hydroxymethyl aminomethane of p H = 75 The comparison between bilirubin and copper ion shows that the coordination ability of lanthanide rare earth ions from La3 + to Yb3 + with bilirubin is slightly different with the increase of atomic number and atomic radius, 1 stereocomplex complex, which is different from the complexes of Cu2 + ions and bilirubin forming a 1: 1 planar structure, and the complexes are in the studied potential window. 4 ~ - 1. 6 V, the performance of non-electroactive. At the same time, the complex formation promoted the oxidation of bilirubin, and the final oxidation product was rare earth-bilirubin complex. The oxidation product is at - 0 on the droplet mercury electrode. 65eV (vs. Ag / Ag Cl) produces - 2e irreversible adsorption wave.