^69,71Ga solid state static, MAS and DAS NMR study of β-Ga₂O₃

Solid‐state NMR characterization of 69Ga and 71Ga in crystalline solids

“…The static spectra ofˇ-Ga 2 O 3 have been studied previously by Massiot and coworkers. 8,16,17 As predicted from the crystal structure, the spectra are described by two equally intense powder patterns. Theˇ-gallium oxide spectrum was assigned by Massiot and coworkers based on the assertion that the GaO 4 site is more distorted from the ideal structure than is the GaO 6 site, and as a result must have a larger C q .…”

“…E-mail: grandinetti.1@osu.edu our understanding of the relationships between structure in gallium compounds and NMR parameters. Model systems such asˇ-Ga 2 O 3 , a compound which has been studied extensively by Massiot and coworkers 8,16,17 is examined, as well as -Ga 2 O 3 , and other modified gallium oxide systems: LiGaO 2 , NaGaO 2 , KGaO 2 , Ga 2 SO 4 3 , and LaGaO 3 . These systems were chosen because their crystal structures are established in the literature and represent a variety of structural units that are present in numerous materials.…”

Structural changes of piezoelectric La3Ga5SiO14 induced by paramagnetic ions revealed by 71Ga multiple quantum magic angle spinning

“…Furthermore, because Ga usually experiences a large quadrupole coupling constant, only few chemical shifts for 71 Ga are reported ( [8][9][10][11] and references therein). Fig.…”

“…71 Ga is a half-integer quadrupolar nucleus and has its central transition broadened by the second order quadrupolar interaction. Lately, due to methodological advancements in Solid-State NMR, 71 Ga (like many other quadrupolar nuclei) has received increased attention from the Solid-State NMR community [8][9][10][11]. A wonderful example of method development is the MQMAS experiment introduced by Frydmann and Harwood [12] which unlocked tremendous structural information concerning halfinteger quadrupolar nuclei.…”

High-resolution two-dimensional NMR spectra of half-integer-spin quadrupolar nuclei from one-dimensional projections

“…A complementary approach to improving the resolution for quadrupolar nuclei displaying second-order broadened resonances is to employ the highest available magnetic field strength since the second-order quadrupolar effect is inversely proportional to the magnetic field. For example, a recent study employing magnets with up to 40 T field strengths provided complete resolution of 4 27 Al sites in the aluminoborate 9Al 2 O 3 •2B 2 O 3 (A9B2) [10], while experiments performed at lower commercially available field strengths give second-order broadened spectra with significant overlap of the resonances. At the extreme magnetic field strength of 40 T the linewidth due to drift and field inhomogeneity exceeds the second-order linewidth and hence the high resolution is achieved at the expense of the information on the quadrupole coupling interaction.…”