| 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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