Studies on the separation treatment of high-level liquid waste by bisamide podand(Ⅰ):Extraction and separation of An(Ⅲ)from Ln(Ⅲ)

A process for actinide(Ⅲ)and lanthanum(Ⅲ)extraction separation from high-level liquid waste(HLLW)was proposed,with N,N,N’,N’-tetraoctyl diglycolamide(TODGA)as the extractant,tri-n–butyl phosphate(TBP)as the phase modifier and 2,6-bis[1-(propan-1-ol)-1,2,3-triazol-4-yl]pyridine(PyTri-Diol or PTD)as hydrophilic stripping agent.This‘hot test’was successfully carried out,achieving 99.92%removal of americium-241(^(241)Am)with a separation factor SF(Eu/Am)of 3.8×10^(3)in the actinide(Ⅲ)product solution.The results show that bisamide podand extractants can effectively realize the extraction and separation of actinide(Ⅲ)and lanthanum(Ⅲ)from Chinese commercial HLLW and thus have a bright practical application potential for the treatment of commercial HLLW.

The synthesis and structure of pyridine-oxadiazole iridium complexes and catalytic applications:Non-coordinating-anion-tuned selective C—N bond formation

Several novel pyridine-oxadiazole iridium complexes were synthesized and characterized through X-ray crystallography.The designed iridium.complexes revealed surprisingly high catalytic activity in C-N bondformation of amides and benzyl alcohols with the assistance of non-coordinating anions.In an attempt to achieve borrowing hydrogen reactions of amides with benzyl alcohols,N,N'-(phenylmethylene)dibenzamide products we re unexpectedly isolated under non-coordinating anion conditions,whereas N-benzylbenzamide products were achieved in the absence of non-coordinating anions.The mechanism explorations excluded the possibility of"silver effect"(silver-assisted or bimetallic catalysis)and revealed that the reactivity of iridium catalyst was varied by non-coordinating anions.This work provided a convenient and useful methodology that allowed the iridium complex to be a chemoselective catalyst and demonstrated the first example of non-coordinating-anion-tuned selective C-N bond formation.