%0 Journal Article %1 noauthororeditor %A Li, Yuxi %A Hegarty, Peter A. %A Rüsing, Michael %A Eng, Lukas M. %A Ruck, Michael %D 2022 %J Z. Anorg. Allg. Chem. %K a %N 21 %P e202200193 %R https://doi.org/10.1002/zaac.202200193 %T Ba(BO$_2$OH) – A monoprotonated monoborate from hydroflux showing intense second harmonic generation %U https://onlinelibrary.wiley.com/doi/abs/10.1002/zaac.202200193 %V 648 %X 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.

@article{noauthororeditor, 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.}, added-at = {2023-04-06T15:00:58.000+0200}, author = {Li, Yuxi and Hegarty, Peter A. and Rüsing, Michael and Eng, Lukas M. and Ruck, Michael}, biburl = {https://www.bibsonomy.org/bibtex/24ba16541d4fdd11517809b9e3d4374ac/ctqmat}, day = 10, description = {Ba(BO2OH) – A monoprotonated monoborate from hydroflux showing intense second harmonic generation}, doi = {https://doi.org/10.1002/zaac.202200193}, interhash = {3fde68d4a1fad15d2152fbf40995b633}, intrahash = {4ba16541d4fdd11517809b9e3d4374ac}, journal = {Z. Anorg. Allg. Chem.}, keywords = {a}, month = {07}, number = 21, pages = {e202200193}, timestamp = {2023-10-18T14:03:39.000+0200}, title = {Ba(BO$_{\mathbf{2}}$OH) – A monoprotonated monoborate from hydroflux showing intense second harmonic generation}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/zaac.202200193}, volume = 648, year = 2022 }