Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation
Li Y, Hegarty PA, Ruesing M, Eng LM, Ruck M (2022)
Publication Type: Journal article
Publication year: 2022
Journal
Book Volume: 648
Article Number: e202200193
Journal Issue: 21
DOI: 10.1002/zaac.202200193
Abstract
Pure samples of colorless, air-stable Ba(BO2OH) crystals were obtained from Ba(NO3)2 and H3BO3 under the ultra-alkaline conditions of a KOH hydroflux at about 250 °C. The product formation depends on the water-base molar ratio and the molar ratio of the starting materials. B(OH)3 acts as a proton donor (Brønsted acid) rather than a hydroxide acceptor (Lewis acid). Ba(BO2OH) crystallizes in the non-centrosymmetric orthorhombic space group P212121. Hydrogen bonds connect the almost planar (BO2OH)2− anions, which are isostructural to HCO3−, into a syndiotactic chain. IR and Raman spectroscopy confirm the presence of hydroxide groups, which are involved in weak hydrogen bonds. Upon heating in air to about 450 °C, Ba(BO2OH) dehydrates to Ba2B2O5. Moreover, the non-centrosymmetric structure of Ba(BO2OH) crystals was verified with power-dependent confocal Second Harmonic Generation (SHG) microscopy indicating large conversion efficiencies in ambient atmosphere.
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How to cite
APA:
Li, Y., Hegarty, P.A., Ruesing, M., Eng, L.M., & Ruck, M. (2022). Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation. Zeitschrift für Anorganische und Allgemeine Chemie, 648(21). https://dx.doi.org/10.1002/zaac.202200193
MLA:
Li, Yuxi, et al. "Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation." Zeitschrift für Anorganische und Allgemeine Chemie 648.21 (2022).
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