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Citation: ZHOU Han-Yang, YU Tian-Lin, AO Yin-Yong, PENG Jing, ZHAI Mao-Lin. Crystal Structure and Radiation Stability of Sr(NO₃)₂·DCH18C6 Complex[J]. Acta Physico-Chimica Sinica, ;2014, 30(8): 1581-1586. doi: 10.3866/PKU.WHXB201406061 shu

Crystal Structure and Radiation Stability of Sr(NO₃)₂·DCH18C6 Complex

1.
Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China

Received Date: 9 May 2014
Available Online: 6 June 2014
Fund Project:

Dicyclohexano-18-crown-6 ether (DCH18C6) is an efficient extractant for the removal of ⁹⁰Sr from liquid radioactive waste. Because the structure and extractability of DCH18C6 might be affected by radiation during practical application, it is necessary to investigate the radiation stability of the complex ofh Sr²⁺ with DCH18C6. In this work, a single crystal of Sr(NO₃)₂·DCH18C6 complex was synthesized and characterized by X-ray diffraction (XRD) and extended X-ray absorption fine structure (EXAFS). The coordination number of Sr²⁺ proved to be 10, including six crown ether O atoms and four O atoms from two bidentate nitrate groups. The average Sr―O bond length is 0.268 nm or 0.266 nm, as determined by XRD or EXAFS, respectively. EXAFS spectra proved that the coordination number and the Sr―O bond length of the complex were slightly affected by irradiation for 400 kGy. Although the micro-Fourier-transform infrared spectra indicated that some C―H bonds were oxidized to hydroxyl or carbonyl, the coordination shell of Sr²⁺ and DCH18C6 was not damaged, indicating od radiation stability of the Sr(NO₃)₂·DCH18C6 complex.
- Crown ether,
- Sr²⁺,
- Radiation stability,
- XRD,
- EXAFS
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Crystal Structure and Radiation Stability of Sr(NO3)2·DCH18C6 Complex

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通讯作者: 陈斌, bchen63@163.com

Crystal Structure and Radiation Stability of Sr(NO₃)₂·DCH18C6 Complex