title: Pneumatic switched angle spinning NMR probe with capacitively coupled double saddle coil.
abstract: Switched angle spinning (SAS) experiments can be used for generating isotropic-anisotropic correlations in oriented samples in a single experiment. In order for these methods to become widespread, specialized hardware is required. Here we describe the electronic and mechanical design and performance of a double-resonance SAS probe. Unlike many previous SAS probe implementations, the focus here is on systems where the dipolar couplings are partially averaged by molecular motion. This probe has a moving double saddle coil capacitively coupled to the stationary circuit. Angle switching is accomplished by a steam engine-type pneumatic mechanism. The speed and stability of the switching hardware for SAS experiments are demonstrated using spectra of model compounds.
authors.affiliation: Department of Chemistry, University of California, Irvine, CA 92697-2025, United States.
authors.forename: Ilya M
authors.initials: IM
authors.lastname: Litvak
authors.forename: Catalina A
authors.initials: CA
authors.lastname: Espinosa
authors.forename: Rebecca A
authors.initials: RA
authors.lastname: Shapiro
authors.forename: Andrew N
authors.initials: AN
authors.lastname: Oldham
authors.forename: Vincent V
authors.initials: VV
authors.lastname: Duong
authors.forename: Rachel W
authors.initials: RW
authors.lastname: Martin
mesh_terms: D025802:Electric Capacitance; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation*; D008280:Magnetics / Q000295:instrumentation*; D011312:Pressure; D014159:Transducers