title: Spin-locking and cross-polarization under magic-angle spinning of uniformly labeled solids.
abstract: Spin-locking and cross-polarization under magic-angle spinning are investigated for uniformly (13)C and (15)N labeled solids. In particular, the interferences from chemical shift anisotropy, and (1)H heteronuclear and (13)C homonuclear dipolar couplings are identified. The physical origin of these interferences provides guidelines for selecting the best (13)C and (15)N polarization transfer rf fields. Optimal settings for both the zero- and double-quantum cross-polarization transfer mechanisms are recommended.
authors.affiliation: Center of Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, FL 32310, USA.
authors.forename: Ivan
authors.initials: I
authors.lastname: Hung
authors.affiliation: Center of Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, FL 32310, USA. Electronic address: gan@magnet.fsu.edu.
authors.forename: Zhehong
authors.initials: Z
authors.lastname: Gan
keywords: Coherence transfer; Cross-polarization; Decoupling; Hartmann–Hahn; Lee–Goldburg; Magic-angle spinning; Proteins; Recoupling; Rotary resonance; SPECIFIC CP; Solid-state; Spin-lock