Synthesis and studies of poly(aminoborane), (H2NBH2)x

Komm, R.; Geanangel, R. A.; LIEPINS, R.

doi:10.1021/ic00153a025

Cited by 69 publications

(27 citation statements)

References 1 publication

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“…In the latter system, the BN ceramic is formed by the continuous dehydrogenative pyrolysis of BH 3 Á NH 3 , which produces B 3 N 3 H 6-x intermediates and poly(aminoborane) through hydrogen eliminations. [19] As mentioned above and also in our previous report, [8] the remnant oxygen impurity plays a vital role in the resultant morphology. We also further confirm that the spherical morphology of a BN layered crystal is indeed a metastable intermediate structure, because the high-temperature purification directed to fully remove oxygen leads to the collapse of the spherical structures.…”

Section: Growth Mechanismsupporting

confidence: 62%

Synthetic Routes and Formation Mechanisms of Spherical Boron Nitride Nanoparticles

Tang

Bando

Huang

et al. 2008

Adv Funct Materials

204

162

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A new concept is proposed to explain the formation of spherical boron nitride (BN) nanoparticles synthesized by the chemical vapor deposition (CVD) reaction of trimethoxyborane (B(OMe)3) with ammonia. The intermediate phases formed during the CVD under different reaction conditions are analyzed by X‐ray diffraction, electron microscopy, thermogravimetry, and spectroscopy techniques. The transition mechanism from an intermediate B(OMe)3–xH3–xN (x < 2) phase having single BN bonds to the BN nanoparticles is elucidated. This particularly emphasizes the CVD temperature effect governing the conversion of the NH···OB hydrogen bonds in (OMe)3B · NH3 into the NB bonds in B(OMe)3–xH3–xN. The spherical morphology strongly depends on the remnant impurity oxygen formed upon Me2O group elimination in the intermediate. Two types of spherical BN nanoparticles primarily attractive for immediate commercialization (with C and H impurities at a level less than 1 wt %) are synthesized by the adjustment of experimental parameters: high oxygen‐containing (∼6.3 wt %) BN spheres with a diameter of ∼90 nm and a specific surface area of 26.8 m2 g−1; and low oxygen‐containing (<1 wt %) BN spheres with a diameter of ∼30 nm and a surface area of 52.7 m2 g−1. Finally, the regarded synthetic techniques are fully optimized in the present work.

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Section: Growth Mechanismsupporting

confidence: 62%

Synthetic Routes and Formation Mechanisms of Spherical Boron Nitride Nanoparticles

Tang

Bando

Huang

et al. 2008

Adv Funct Materials

204

162

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“…2. All the major bands match the spectrum of (NH 2 BH 2 ) x reported earlier [8]. Characteristic N±H and B±H absorption of the polymer appear at 3300 and 2350 cm…”

Section: Resultssupporting

confidence: 83%

“…It is known that polymeric NH 2 BH 2 can be formed by subjecting borazine vapor to a radio frequency (RF) discharge [7] or vapor phase pyrolysis of ammonia±borane (H 3 N BH 3 ) [8]. In addition, it has been reported that borazine could be synthesized from pyrolysis of ammonia±borane (H 3 NÁBH 3 ) [9] or B 2 H 6 Á2NH 3 [10].…”

mentioning

confidence: 99%

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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“…Both of the BN-based polymers, for which we show that their ordered phases are highly polar, are already well known. PAB, for example, is routinely used as a precursor for preparing h-BN [25,26]. PADFB has also been synthesized, although not yet in large quantities.…”

mentioning

confidence: 99%

Ab InitioStudies of Polarization and Piezoelectricity in Vinylidene Fluoride and BN-Based Polymers

2004

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Highly piezoelectric and pyroelectric phases of boron-nitrogen-based polymers have been designed from first principles. They offer excellent electrical and structural properties, with up to 100% improvement in the piezoelectic response and an enhanced thermal stability with respect to polyvinylidene fluoride (PVDF). Since methods for their synthesis are readily available, these polymers are extremely promising for numerous technological applications, rivaling the properties of ferroelectric ceramics and superseding PVDF-based materials in high-performance devices.

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Synthesis and studies of poly(aminoborane), (H2NBH2)x

Cited by 69 publications

References 1 publication

Synthetic Routes and Formation Mechanisms of Spherical Boron Nitride Nanoparticles

Synthetic Routes and Formation Mechanisms of Spherical Boron Nitride Nanoparticles

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

Ab InitioStudies of Polarization and Piezoelectricity in Vinylidene Fluoride and BN-Based Polymers

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