皂化酸性磷酸酯萃取稀土离子过程中有机相的FTIR光谱表征; FTIR characterization of extracted organic phase in saponified organophosphoric acid system containing lanthanide | |
姚淑心 ; 王笃金 ; 翁诗甫 ; 吴瑾光 | |
1995 | |
关键词 | D2EHPA FTIR D2EHPA rare earth microemulsion FTIR 稀土 微乳状液 |
英文摘要 | 研究了不同浓碱皂化的D2EHPA-正庚烷体系萃取一系列稀土离子(La ̄(3+)→Lu ̄(3+),放射性的Pm 除外)过程中有机相的FTIR光谱变化规律.结果表明:D2EHPA萃取稀土离子后,P=O基团的红外吸收频率降低,吸收强度升高,说明P=O基团与稀土离子发生配位;红外光谱研究结果还表明:不同稀土离子与P=O配位能力有差别,从La ̄(3+)→Sm ̄(3+)配位能力依次增大,从Sm ̄(3+)→Lu ̄(3+)则呈下降趋势,对同一个稀土离子来说,随着有机相中稀土离子含量的增加,有机相微乳液中H_2O的含量减小,萃取过程伴随有破乳发生.; FTIR spectroscopy was used to investigate the coordination interaction of D2EHPA [di(-ethylhexyl) phosphoric acid] with lathanide(II) series(La3+-->Lu3+, except radioactive promethium), P=O band shifts to the lower frequency when D2EHPA is saponified with concentrated basic solutions (NaOH, KOH or NH3 . H2O) The coordination sequence of Na+, K+ and NH4+ with P=O group is NH4+ > Na+ > K+. The frequency of P=O band in the extracted organic phase containing RE-D2EHPA complexes shifts to the lower wavenumbers as the lanthanide( Hi) loading increases in organic phase, and the intensity of P=O band increases, FTIR spectra results show that the coordination ability of lanthanide (II) series with P=O group is as follows: La3+ < Ce3+ < Pr3+ < Nd3+ < Sm3+ > Eu3+ > ... > Lu3+, namely, the complexation intreaction of Sm3+ with P=O is the strongest. In addition, the w/o microemulsion was gradually destructed with the entrance RE(3+) into the organic phase.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1995TP29800003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科学引文数据库(CSCD); 1; 11; 1664-1668; 16 |
语种 | 中文 |
出处 | 知网 ; SCI |
出版者 | 高等学校化学学报 |
内容类型 | 其他 |
源URL | [http://hdl.handle.net/20.500.11897/81138] ![]() |
专题 | 化学与分子工程学院 |
推荐引用方式 GB/T 7714 | 姚淑心,王笃金,翁诗甫,等. 皂化酸性磷酸酯萃取稀土离子过程中有机相的FTIR光谱表征, FTIR characterization of extracted organic phase in saponified organophosphoric acid system containing lanthanide. 1995-01-01. |
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