Pressure and Temperature Effects on ^2H-NMR Spin-Lattice Relaxation Times in TBA-and Urea-D_2O Solutions

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著者

    • Ibuki K. IBUKI K.
    • Department of Molecular Science and Technology Faculty of Engineering, Doshisha University
    • Ueno M. UENO M.
    • Department of Molecular Science and Technology Faculty of Engineering, Doshisha University

抄録

The <SUB>2</SUB>H NMR spin-lattice relaxation times (T<SUB>1</SUB>) of D<SUB>2</SUB>O molecules and the <SUP>1</SUP>H chemical shifts (δ) of water in tert-butyl alcohol (TBA) -and urea-D<SUB>2</SUB>O solutions up to 8 mol% were measured at 7. 7, 29. 9, and 48. 4°C up to 294 MPa in order to elucidate the pressure and temperature effects on the hydrophobic hydration. The pressure coefficient of T<SUB>1</SUB> in the TBA solution was smaller than that in pure water, and decreased monotonously with an increase in the TBA content. The δ (H<SUB>2</SUB>O) in the TBA solution exhibits a downfield shift relative to that in neat D<SUB>2</SUB>O and the difference in the δ (H<SUB>2</SUB>O) between TBA solution and neat D<SUB>2</SUB>O becomes larger with compression. These results suggest that the structure of the hydration shell is not so bulky as the tetrahedral open structure of water. On the other hand, the results in urea solutions were in marked contrast to those in TBA solutions.

収録刊行物

  • 高圧力の科学と技術 = The Review of high pressure science and technology  

    高圧力の科学と技術 = The Review of high pressure science and technology 7, 1159-1161, 1998 

    The Japan Society of High Pressure Science and Technology

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各種コード

  • NII論文ID(NAID)
    10002693202
  • NII書誌ID(NCID)
    AN10452913
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    0917639X
  • NDL 記事登録ID
    4494177
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z17-1589
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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