title: 24 T High-Resolution and -Sensitivity Solid-State NMR Measurements of Low-Gamma Half-Integer Quadrupolar Nuclei35Cl and37Cl.
abstract: Solid-state NMR observations of low-gamma half-integer quadrupolar nuclei,35Cl and37Cl, were demonstrated using a 24 T hybrid magnet (1H resonance frequency of 1.02 GHz) comprised of the high-temperature (HTS) and low-temperature (LTS) superconductors, and compared with results using a 14.1 T standard NMR magnet. While at 24 T the linewidth is 1.7 times narrower than that at 14.1 T, the gain in the sensitivity is 7.0 times because of enhanced polarization, reduced linewidth, and the use of larger rotor. A simple theoretical model was used to rationalize the sensitivity enhancements. The ratio of35Cl and37Cl quadrupolar couplings agrees well with the ratio of quadrupolar moments, and no isotope-dependent chemical shift has been observed. In addition, the 3QMAS spectrum of35Cl is shown to demonstrate the high sensitivity rendered by the 24 T spectrometer.
authors.affiliation: RIKEN CLST-JEOL Collaboration Center, RIKEN.
authors.forename: Manoj Kumar
authors.initials: MK
authors.lastname: Pandey
authors.forename: Kenjiro
authors.initials: K
authors.lastname: Hashi
authors.forename: Shinobu
authors.initials: S
authors.lastname: Ohki
authors.forename: Gen
authors.initials: G
authors.lastname: Nishijima
authors.forename: Shinji
authors.initials: S
authors.lastname: Matsumoto
authors.forename: Takashi
authors.initials: T
authors.lastname: Noguchi
authors.forename: Kenzo
authors.initials: K
authors.lastname: Deguchi
authors.forename: Atsushi
authors.initials: A
authors.lastname: Goto
authors.forename: Tadashi
authors.initials: T
authors.lastname: Shimizu
authors.forename: Hideaki
authors.initials: H
authors.lastname: Maeda
authors.forename: Masato
authors.initials: M
authors.lastname: Takahashi
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Yanagisawa
authors.forename: Toshio
authors.initials: T
authors.lastname: Yamazaki
authors.forename: Seiya
authors.initials: S
authors.lastname: Iguchi
authors.forename: Ryoji
authors.initials: R
authors.lastname: Tanaka
authors.forename: Takahiro
authors.initials: T
authors.lastname: Nemoto
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Miyamoto
authors.forename: Hiroto
authors.initials: H
authors.lastname: Suematsu
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Saito
authors.forename: Takashi
authors.initials: T
authors.lastname: Miki
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Nishiyama