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2000 (1)
1Author    Liuping Chen, Thomas Gross, Hans-Dietrich LüdemannRequires cookie*
 Title    The T, /7-Dependence of the Chemical Shift of the Hydroxyl Protons in Deeply Supercooled Methanol and Water  
 Abstract    The hydroxyl proton chemical shifts 6 (H-O) of supercooled methanol (7" min = 149 K) and water have been determined (7" min = 183 K), and the pressure dependence of these shifts was measured up to 200 MPa. In both compounds the downfield shift of <5 (H-O) continues down to the lowest tempera-tures reached. This result disagrees with the two state models for the hydrogen bond formation in both liquids. The isotherms ö (H 2 0) show for T< 273 K an upfield shift that becomes more pronounced with decreasing temperature. For 6 (H-O-CH^), increasingp causes at all temperatures a downshift. 
  Reference    Z. Naturforsch. 55a, 473—477 (2000); received November 11 1999 
  Published    2000 
  Keywords    NMR, Supercooling, Pressure, Methanol, Water 
  Similar Items    Find
 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0473.pdf 
 Identifier    ZNA-2000-55a-0473 
 Volume    55