title: Removal of sidebands in double-rotation NMR in real time.
abstract: Double-rotation (DOR) is the only technique generally capable of yielding high-resolution NMR spectra of half-integer quadrupolar nuclei in one dimension for solids without the need for sophisticated coherence pathway selection. Unfortunately, due to the low outer rotor spinning frequencies currently available, the spectra often contain a large number of spinning sidebands which may overlap with the resonances of interest. We implement a simple, robust, and easy to use family of pulse sequences, which in practice are fully analogous to the 'total suppression of sidebands' (TOSS) sequences, to suppress all sidebands arising from the spinning of the outer rotor in DOR experiments. By removing the rotor phase dependence of the evolution of the sidebands, the sidebands destructively interfere with one another during the course of signal averaging to yield 'solution-like' spectra of half-integer quadrupolar nuclei in solids. Advantages and shortcomings of the method compared to other DOR sideband suppression methods are explored with the aid of simulations.
authors.affiliation: Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie Private, Ottawa, Ontario, Canada K1N 6N5.
authors.forename: Frédéric A
authors.initials: FA
authors.lastname: Perras
authors.forename: David L
authors.initials: DL
authors.lastname: Bryce
mesh_terms: D000465:Algorithms; D016477:Artifacts; D003199:Computer Systems; D003461:Crystallography; D011756:Diphosphates / Q000737:chemistry; D004574:Electromagnetic Fields; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D012979:Sodium Radioisotopes
chemical_list: D011756:Diphosphates; D012979:Sodium Radioisotopes; C003319:sodium pyrophosphate