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本文应用反相纸色层法和静态吸附平衡法检测了王冠化合物与稀土离子之间的络合能力和水相阴离子类型对络合能力的影响。所用的王冠化合物有: B-15-C-5,DB-18-C-6,四氢呋喃丙酮四聚体,DB-18-C-6-甲醛缩聚物和B-15-C-5-甲醛缩聚物。得到如下主要结果: 1.不同王冠化合物的络合能力顺序是; B-15-C-5>DB-18-C-6》四氢呋喃丙酮吗聚体,另B-15-C-5-甲醛缩聚物>DB-18-C-6-甲醛缩聚物。 2.稀土离子络合能力的顺序是: Sm~(3+)Er~(3+)=La~(3+)(反相纸色层法),Er~(3+)>Eu~(3+)>La~(3+)(吸附平衡法)。 3.与不同阴离子缔合的离子对的稳定性顺序是: 苦味酸根>三氯代乙酸根>磺基水杨酸根》Cl~-、NO_3~-、ClO_4~-及SO_4~=。
In this paper, the complexation between the crown compound and the rare earth ions and the influence of the anionic species on the complexation ability were investigated by the method of reversed-phase paper colorimetry and static adsorption equilibrium. The crown compounds used are: polycondensation of B-15-C-5, DB-18-C-6, tetrahydrofurfuryl acetone tetramer, DB-18- Things. The main results are as follows: 1. The order of complexation of different crown compounds is: B-15-C-5> DB-18-C-6 “ > DB-18-C-6-formaldehyde condensation polymer. (2) The order of rare earth ion complexing ability is: Sm 3+ Er 3+ = La 3+, reverse color paper layer method, Er 3+ Eu 3+ +)> La ~ (3 +) (adsorption equilibrium method). The order of stability of the ion pairs associated with different anions is picrate> trichloroacetate> sulfosalicylate ”Cl ~ -, NO_3 ~ -, ClO_4 ~ - and SO_4 ~ =.