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Citation: GAO Jian-Xun, WANG Jian-Chen, SONG Chong-Li, LIU Tao, HU Tian-Dou, XIE Ya-Ning, YANG Huai. A Study on the Coordination Chemistry of Calixcrowns with Metal Ions in Solution by NMR and XAFS[J]. Acta Physico-Chimica Sinica, ;2005, 21(04): 354-359. doi: 10.3866/PKU.WHXB20050403 shu

A Study on the Coordination Chemistry of Calixcrowns with Metal Ions in Solution by NMR and XAFS

1.
School of Material Science and Technology, University of Science and Technology, Beijing　100083;　 Institute of Nuclear Energy and Technology of Tsinghua University, Beijing　100084;　BSSR, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing　100039

Received Date: 16 August 2004
Available Online: 15 April 2005

In order to study the coordination chemistry of calixcrowns in solution, the single crystals of 25,27-bis-octyloxy-calix[4]arene-26,28-crown-6 (BOC6) and 1,3-alternate biscrown-6 (BisC6) are presented in the paper. By using NMR and XAFS, the coordination behaviors of BOC6 and BisC6 in CDCl₃ and NPME (o-nitro-phenyl methyl ether) or OA (n-octyl alcohol) with alkali metal ion are studied respectively. The results indicate that the symmetry of the crown ether chain is improved obviously as the cesium ion is imbedded in. The coordination number of cesium is seven and the complex structure with seven-oxygen coordination is stable in solution. One of the nitrate radical oxygen might coordinate with cesium directly.
- BOC6; BisC6; XAFS; NMR
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