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Citation: Gao Hongcheng, Wu Jinguang, Weng shifu, Xu Guangxian. THE FOURIER TRANSFORM INFRARED SPECTRA OF FIFTEEN RARE EARTH-EHPAEH COMPLEXES[J]. Chinese Journal of Applied Chemistry, ;1984, 1(2): 36-40. shu

THE FOURIER TRANSFORM INFRARED SPECTRA OF FIFTEEN RARE EARTH-EHPAEH COMPLEXES

1.
Dept. of Chemistry, Peking University

Received Date: 10 October 1983
Available Online: 23 November 1983

2-Ethylhexylphosphonic acid mono(2-ethylhexyl) ester (EHPAEH) is a more effective extractant than D2EHPA for extraction of rare earths.Fifteen solid and solution rare earth-EHPAEH complexes in kerosine have been prepared and their FT-IR spectra have also been studied using a subtraction technique. In the FT-IR subtraction spectra of either the extracted species in the organic phase or the solid complexes, a positive peak and a negative one were observed corresponding to ν_P=O→M and ν_P=O respectively, or to ν_P-O-M and ν_P-O-H respectively. The variation of ν_P=O→M, ν_P-O-M and ν_O-M (150cm^-1) with the atomic number of lanthanides was shown in Fig.5 and Fig.7 for the solid com-plexes. These curves show an obvious "tetrad effect", Y being located be-tween Er and Tm.
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