High-Resolution Two-Field Nuclear Magnetic Resonance Spectroscopy
Abstract
Nuclear Magnetic Resonance (NMR) is a ubiquitous branch of spectroscopy that can explore matter on the scale of the atom. Significant improvements in sensitivity and resolution have been driven by a steady increase of static magnetic field strengths. However, some properties of nuclei may be more favourable at low magnetic fields. For example, line-broadening due to chemical shift anisotropy increases sharply at higher magnetic fields. Here, we present a two-field NMR spectrometer that permits the application of rf-pulses and acquisition of NMR signals in two magnetic centres. Our prototype operates at 14.1 T and 0.33 T. The main features of this system are demonstrated by novel NMR experiments that correlate zero-quantum coherences at low magnetic field with single quantum coherences at high magnetic field, so that high resolution can be achieved in both dimensions, despite a ca. 10 ppm inhomogeneity of the low field centre. Two-field NMR spectroscopy offers the possibility to circumvent the limits of high magnetic fields, while benefiting from their exceptional sensitivity and resolution. This approach opens new avenues for NMR above 1 GHz.
Domains
Material chemistry
Fichier principal
pccp2016_Sakellariou_AcceptedVersion.pdf (934.05 Ko)
Télécharger le fichier
c6cp05422f1.pdf (703.18 Ko)
Télécharger le fichier
Origin : Files produced by the author(s)
Comment : version acceptée
Comment : version acceptée
Origin : Files produced by the author(s)