title: Variable angle spinning (VAS) experiments for strongly oriented systems: methods development and preliminary results.
abstract: Variable angle spinning (VAS) experiments provide a useful method for measuring long-range dipolar couplings and obtaining isotropic-anisotropic correlation spectra. These experiments make it possible to obtain correlations between isotropic and anisotropic spectra without altering the chemical composition of the sample. They also allow working with very strongly oriented systems that are not accessible to solution-state techniques. In this communication, we discuss recent hardware developments in our laboratory and show representative data from small molecules in strongly oriented liquid-crystalline samples.
authors.affiliation: Department of Chemistry, Materials Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720, USA.
authors.forename: Chunqi
authors.initials: C
authors.lastname: Qian
authors.forename: Pierre
authors.initials: P
authors.lastname: Thureau
authors.forename: Rachel W
authors.initials: RW
authors.lastname: Martin
mesh_terms: D000097:Acetonitriles / Q000737:chemistry*; D016880:Anisotropy; D002247:Carbon Isotopes; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation / Q000379:methods* / Q000592:standards; D015394:Molecular Structure; D011522:Protons; D012015:Reference Standards; D012997:Solvents / Q000737:chemistry
chemical_list: D000097:Acetonitriles; D002247:Carbon Isotopes; D011522:Protons; D012997:Solvents; C032159:acetonitrile