Molecular Reorientation in Liquids. Deuteron Quadrupole Relaxation in Liquid Deuterium Oxide and Perdeuterobenzene

Journal Article · Wed Jan 01 04:00:00 EST 1964 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.1725512· OSTI ID:4020394

Woessner, D. E.

Temperature-dependence measurements were made on the deuteron spin- lattice relaxation times for liquid deuterium oxide and pordeuterobenzene. The quadrupole spinlattice relaxntion is expressed in terms of motional models previously developed for magnetic dipole -dipole relaxation. The deuterium oxide data are discussed in terms of microwave, dielectric relaxation, and hydrogen- bonding phenomena. The T₁ values follow rather closely a proportionality to absolute temperature divided by viscosity. The effective quadrupole coupling constant is only 2/3 to 3/4 of the value derived from microwave data. For perdeuterobenzene, the 1.86-kcal/mole activation energy rules out a dominance of the rotational-inertia effect previously proposed. The temperature dependence is much lower than that of the absolute temperature divided by viscosity. Possible reasons for this are discussed. By use of proton-relaxation data, a quadrupole coupling constant value of 138 kc/sec is estimated, assuming axial symmetry of the electric-field gradiert about the C--D bond.

• Research Organization: Socony Mobil Oil Co., Inc., Dallas
• Sponsoring Organization: USDOE
• NSA Number: NSA-18-019962
• OSTI ID: 4020394
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 8 Vol. 40; ISSN JCPSA6; ISSN 0021-9606
• Publisher: American Institute of Physics (AIP)
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ACTIVATION ENERGY
BENZENE
BINDING ENERGY
COUPLING CONSTANTS
DEUTERIUM COMPOUNDS
DEUTERONS
DIELECTRICS
DIPOLES
ELECTRIC FIELDS
HEAVY WATER
HYDROGEN
INTERACTIONS
LATTICES
LIQUIDS
MAGNETIC FIELDS
MICROWAVES
NUCLEAR MODELS
PROTONS
QUADRUPOLES
RELAXATION
ROTATION
SPIN
VISCOSITY