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Abstract
The magnetic shielding tensors of protons of water in barium chlorate monohydrate are investigated by means of solid-state NMR spectroscopy, both for static powders and under magic-angle spinning conditions.
Highlights
Water is one of the most abundant molecules on earth and plays a fundamental role in a wide variety of chemical systems, ranging from the biochemical pathways underlying the most complex functions of living systems to the mechanical properties of the Earth's crust
Attention has been drawn to the possibility of manipulating the populations of the proton spin eigenstates of water in view of exciting a long-lived state in analogy with paraH2.4 A knowledge of all nuclear spin interactions which can affect and perturb the eigenstates of protons in water is crucial for the design of experimental strategies aiming at establishing long-lived states in any context, whether in liquid bulk, trapped in a crystal or in a fullerene cage.[5,6,7]
Speci c experiments may be used to reintroduce the anisotropic information averaged out by the mechanical rotation. All these capabilities identify solid-state NMR spectroscopy as a method of choice for investigations of the interactions that can affect nuclear spin states
Summary
Water is one of the most abundant molecules on earth and plays a fundamental role in a wide variety of chemical systems, ranging from the biochemical pathways underlying the most complex functions of living systems to the mechanical properties of the Earth's crust. One additional parameter that needs to be taken into account in order to analyze the spectrum in Fig. 1a is the relative orientation of the shielding and dipolar tensors of the proton spins.
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