High-field boron-11 magic-angle spinning NMR characterization of boron nitrides

Marchetti, Paul S.; Kwon, D.H.; Schmidt, Wayde R.; Interrante, L. V.; Maciel, Gary E.

doi:10.1021/cm00015a023

Cited by 85 publications

(76 citation statements)

References 6 publications

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“…8a) shows at least two main signals at negative ppm values, in the area of tetracoordinated borons, plus a smaller one at positive ppm values very similar to that obtained for B 3 N 3 ring structure [27]. The comparison between the 11 B MAS and 11 B CP/MAS NMR spectra of the polymer recorded at 7 T (Fig.…”

Section: B Mas Nmr Studiessupporting

confidence: 72%

Synthesis and characterization of poly(aminoborane) as a new boron nitride precursor

Kim

Moon

Kho

et al. 1999

Polym. Adv. Technol.

101

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During the solution reaction of NaBH4/(NH4)2SO4 in tetraglyme to form borazine, polymeric aminoborane (NH2BH2)x has been isolated as a white powder. The powder was characterized by thermal gravimetric analysis/differential scanning calorimetry, infrared and mass spectroscopies, and powder X‐ray diffraction. Solid‐state 15N and 11B nuclear magnetic resonance firmly proved that the chain‐like poly(aminoborane) evolved a partially condensed B3N3 ring structure by dehydrogenative condensation between chains at 200 °C. Pyrolysis of the polymer in a nitrogen stream up to 1400 °C led to a 75% yield of hexagonal boron nitride with an interlayer spacing of 3.37 Å. Copyright © 1999 John Wiley & Sons, Ltd.

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Section: B Mas Nmr Studiessupporting

confidence: 72%

Synthesis and characterization of poly(aminoborane) as a new boron nitride precursor

Kim

Moon

Kho

et al. 1999

Polym. Adv. Technol.

101

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“…On the other hand, the 11 B MAS NMR spectrum presents at least two overlapping resonances at 6.3 ppm and 18.3 ppm (Figure S6), which is due to the second-order quadrupolar interaction. Thus, the B atoms are likely in a BN3 or BN2H environment [31,32]. The N 1s peak at ~399.1 eV is possibly a N-N bond.…”

Section: Resultsmentioning

confidence: 99%

Efficient Synthesis of an Aluminum Amidoborane Ammoniate

et al. 2015

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“…3, 19.5 kHz MAS at 14.1 T)[15,16] and kyanite(11.4 kHz MAS at 11.7 T) [151.Even with relatively slow spinning, the improvement in resolution in going from 9.4 to 14.1 T for MAS 27A1 NMR studies was reported in 1985[70,71]. Since then, several studies have been carried out on 11B, 23Na, 27A1, 69Ga, and 71Ga at 14.1 T with MAS at up to 19.5 kHz[16,[72][73][74][75][76][77][78]. As 14.1 T systems become more available, the number of studies on non-integral spin quadrupolar nuclei win surely increase rapidly.…”

mentioning

confidence: 99%

Critical factors in obtaining meaningful fast MAS NMR spectra of non-integral spin quadrupolar nuclei. A review with particular emphasis on27Al MAS NMR of catalysts and minerals

Alemany

1993

Appl. Magn. Reson.

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In the last decade, magic angle spinning (MAS) NMR has become an extremely important method for studying the structure of inorganic solids. Advances in NMR technology have greatly aided in understanding the structure of catalysts, minerals, clays, ceramics, glasses, etc. Obtaining meanin~ul MAS spectra of spin-1/2 nuclei such as 29Si and 31p is relatively straightforward and well understood. In contrast, obtaining meaningful MAS spectra is far from simple with non-integral spin quadrupolar nuclei such as 11B (I= 3/2), 170 (I=5/2), 23Na (I= 3/2), 27A1 (I= 5/2), 69Ga (I= 3/2), and 71Ga (I= 3/2) -to name some of the most commonly studied nuclei. Many additional factors have to be considered. This paper will deal with these factors and the utility of vely fast MAS for studying non-integral spin quadrupolar nuclei in inorganic solids.

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High-field boron-11 magic-angle spinning NMR characterization of boron nitrides

Cited by 85 publications

References 6 publications

Synthesis and characterization of poly(aminoborane) as a new boron nitride precursor

Synthesis and characterization of poly(aminoborane) as a new boron nitride precursor

Efficient Synthesis of an Aluminum Amidoborane Ammoniate

Critical factors in obtaining meaningful fast MAS NMR spectra of non-integral spin quadrupolar nuclei. A review with particular emphasis on27Al MAS NMR of catalysts and minerals

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