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231223s2006 xx ||||| 00| ||eng c |
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|c DE-627
|e rakwb
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|a eng
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|a Ash, Jason T
|e verfasserin
|4 aut
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|a Solid-state NMR characterization of 69Ga and 71Ga in crystalline solids
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|c 2006
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 23.08.2007
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|a Date Revised 21.11.2013
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|a published: Print
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|a Citation Status MEDLINE
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|a Copyright (c) 2006 John Wiley & Sons, Ltd.
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|a Gallium model systems containing four- and six-coordinate gallium sites have been investigated using solid-state NMR. Measurement of the isotropic chemical shift and electric field gradient (EFG) have been performed at 9.4 T on alpha-Ga2O3, beta-Ga2O3, LiGaO2, NaGaO2, KGaO2, Ga2(SO4)3, and LaGaO3 using a variety of techniques on both NMR active nuclei (69Ga and 71Ga) including static, high speed magic-angle spinning (MAS), satellite transition (ST) spectroscopy, and rotor-assisted population transfer (RAPT). The chemical shift is found to correlate well with the coordination number, with four-coordinate gallium having values of approximately 50 ppm and six-coordinate gallium having values near 225 ppm (referenced to 1 M gallium nitrate solution). The magnitude of the EFG is found to be correlated to the distortion of the gallium polyhedra, with the strained systems having EFGs of 3 x 10(21) Vm(-2) or more, while the less strained systems have values of 1.5 x 10(21) Vm(-2) or less. A plot of chemical shift versus EFG suggests that solid-state NMR of gallium oxyanions can be more discriminating than liquid state NMR chemical shifts alone
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|a Journal Article
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a Anions
|2 NLM
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|a Gallium Isotopes
|2 NLM
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|a Metals, Alkali
|2 NLM
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|a Oxides
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|a Gallic Acid
|2 NLM
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|a 632XD903SP
|2 NLM
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|a Gallium
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|a CH46OC8YV4
|2 NLM
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|a Grandinetti, Philip J
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Magnetic resonance in chemistry : MRC
|d 1985
|g 44(2006), 9 vom: 15. Sept., Seite 823-31
|w (DE-627)NLM098179667
|x 1097-458X
|7 nnns
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|g volume:44
|g year:2006
|g number:9
|g day:15
|g month:09
|g pages:823-31
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|d 44
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