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Effect of ligand initial conformation and counteranion on complexation behaviors of r-btbp toward Pd(Ⅱ)contained in highly active liquid waste

引用

Chinese Chemical Letters 2022年第7期33卷 3565-3569页

作者： Lei Xu Wenya Ding Anyun Zhang Ziyang Liu Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agriculture and Zhejiang Province Institute of Nuclear Agricultural SciencesZhejiang UniversityHangzhou 310058China College of Chemical and Biological Engineering Zhejiang UniversityHangzhou 310027China College of Materials Science and Engineering China Jiliang UniversityHangzhou 310018China

Soft N-donor bis-triazin bipyridines derives(r-btbp)are a type of very promising extratant for extraction and complexation with long-lived trivalent minor actinides over lanthanides from highly active liquid waste(HLW).In addition to minor actinides,r-btbp also holds very strong complexation ability toward fission ***,few studies have been focused on the separation and complexation with the fission product Pd(Ⅱ)by ***,the complexation behaviors of Pd(Ⅱ)with four typical r-btbp ligands were systematically studied by single crystal X-ray diffraction,1H NMr titration and theoretical *** effects of r-btbp initial conformation and nitrate anions on the complexation behaviors of r-btbp with Pd(Ⅱ)were thoughtfully *** the 1:1 and 2:1 binuclear complexes could be formed between Pd(Ⅱ)and r-btbp with initialⅡconformation in the presence of nitrate anions,while only one 1:1 type Pd(Ⅱ)complex could be formed for those with initial OO *** nitrate anion,only one 1:1 type complex was formed in *** structure of the 1:1 Pd(Ⅱ)/r-btbp complex was firstly characterized by single crystal *** calculation results showed that a significant large rotational energy barrier(21.8~22.6 kcal/mol)must be overcome to form theⅡtype 2:1Pd(Ⅱ)complex for those OO type r-btbp ligands,however which would not prevent them from forming the 1:1 type complex.

关键词： r-btbp Fission product palladium Minor actinides Complexation Highly active liquid waste

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