High-pressure ¹²⁹XeNMR study of supercritical xenon interacting with polymers

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• 作者：Nagasaka ; Bunsow ; Omi ; Hironori ; Eguchi ; Taro ; Nakayama ; Hirokazu ; Nakamura ; Nobuo
• 刊名：Chemical Physics Letters
• 出版年：2001
• 出版时间：June 8, 2001
• 年：2001
• 卷：340
• 期：5-6
• 页码：473-478
• 全文大小：177 K

文摘

High-pressure ¹²⁹XeNMR experiments have been performed by using a newly designed probe. ¹²⁹XeNMR spectrum for the mixture of Xe and a polymer, either bisphenol-A polycarbonate or polytetrafluoroethylene, consists of two lines in a pressure range of 0.3–10 MPa. ¹²⁹XeNMR chemical shift (δ) for the free Xe is mainly governed by the Xe–Xe interactions. δ for Xe confined in the micropore of polymers is strongly affected by the Xe-wall interactions. It is found that δ of the confined Xe is mainly determined by a sort of `virtual pressure' and is not influenced by a drastic change of the free Xe density in the critical region.