TY - JOUR
T1 - Development and computational modeling of novel bifunctional organophosphorus extractants for lanthanoid separation
AU - Goto, Masahiro
AU - Matsumoto, Satoshi
AU - Uezu, Kazuya
AU - Nakashio, Fumiyuki
AU - Yoshizuka, Kazuharu
AU - Inoue, Katsutoshi
N1 - Funding Information:
This work was supported by the Salt Science Foundation and by the re- search fund of the Power Reactor and Nuclear Fuel Development Corporation.
PY - 1999
Y1 - 1999
N2 - Novel organophosphorus extractants, which have two functional groups in the molecular structure, have been developed for the separation of lanthanoids using the liquid-liquid extraction technique. The separation efficiency and extractability of the novel extractants were investigated for nine lanthanoids. These bifunctional extractants have an extremely high extractability to all the lanthanoids compared to those of commercially available organophosphorus extractants. Two isomers having an identical chemical formulation show significantly different behaviors in lanthanoid extraction. This means that the extraction and separation abilities are quite sensitive to the structure of the spacer connecting the two functional groups. We also discuss the experimental results with a computational modeling by means of molecular mechanics and semiempirical molecular orbital methods. The novel molecular mechanics (MM) calculation program MOMEC enables us to analyze the stable conformation of a series of lanthanoid complexes. The calculation suggests that the structural effect of the spacer is one of the decisive factors for enhancing selectivity and extractability in lanthanoid extraction.
AB - Novel organophosphorus extractants, which have two functional groups in the molecular structure, have been developed for the separation of lanthanoids using the liquid-liquid extraction technique. The separation efficiency and extractability of the novel extractants were investigated for nine lanthanoids. These bifunctional extractants have an extremely high extractability to all the lanthanoids compared to those of commercially available organophosphorus extractants. Two isomers having an identical chemical formulation show significantly different behaviors in lanthanoid extraction. This means that the extraction and separation abilities are quite sensitive to the structure of the spacer connecting the two functional groups. We also discuss the experimental results with a computational modeling by means of molecular mechanics and semiempirical molecular orbital methods. The novel molecular mechanics (MM) calculation program MOMEC enables us to analyze the stable conformation of a series of lanthanoid complexes. The calculation suggests that the structural effect of the spacer is one of the decisive factors for enhancing selectivity and extractability in lanthanoid extraction.
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U2 - 10.1081/SS-100100760
DO - 10.1081/SS-100100760
M3 - Article
AN - SCOPUS:0033510523
SN - 0149-6395
VL - 34
SP - 2125
EP - 2139
JO - Separation Science and Technology
JF - Separation Science and Technology
IS - 11
ER -