NMR spectroscopy study of local correlations in water
Abstract
Using nuclear magnetic resonance we study the dynamics of the hydrogen bond (HB) sub-domains in bulk and emulsified water across a wide temperature range that includes the supercooled regime. We measure the proton spin-lattice T1 and spin-spin T2 relaxation times to understand the hydrophilic interactions that determine the properties of water. We use (i) the Bloembergen, Purcell, and Pound approach that focuses on a single characteristic correlation time τc, and (ii) the Powles and Hubbard approach that measures the proton rotational time τθ. We find that when the temperature is low both relaxation times are strongly correlated when the HB lifetime is long, and that when the temperature is high a decrease in the HB lifetime destroys the water clusters and decouples the dynamic modes of the system.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 05, 2016
- Source ID
- 10.1063/1.4968589
Entities
People
- Carmelo Corsaro
- Domenico Mallamace
- Francesco Mallamace
- H. Eugene Stanley
- Sebastiano Vasi
Organizations
- Boston University
- Defense Threat Reduction Agency
- Division of Civil, Mechanical & Manufacturing Innovation
- Division of Physics
- United States Department of Energy
- University of Messina