Abstract
Explorative solid‐state chemistry led to the discovery of the two new compounds Ga5B12O25(OH) and In5B12O25(OH). Extreme synthetic conditions within the range of 12 GPa and a temperature of 1450 °C realized in a Walker‐type multianvil apparatus resulted in the formation of an unprecedented tetragonal structure with the exclusive presence of condensed BO4 tetrahedra, forming cuboctahedral cavities. Doping of these cavities with Eu3+ in In5B12O25(OH) yielded in an orange–red luminescence. Photocatalytic tests of In5B12O25(OH) revealed a hydrogen production rate comparable to TiO2 but completely co‐catalyst free.
Highlights
Explorative solid-state chemistry led to the discovery of the two new compounds Ga5B12O25(OH) and In5B12O25(OH)
Extreme synthetic conditions within the range of 12 GPa and a temperature of 1450 8C realized in a Walkertype multianvil apparatus resulted in the formation of an unprecedented tetragonal structure with the exclusive presence of condensed BO4 tetrahedra, forming cuboctahedral cavities
Triel borates shifted into our research focus, but have been examined for their photocatalytic activity lately by other groups as well.[2]
Summary
International Edition: DOI: 10.1002/anie.201804083 German Edition: DOI: 10.1002/ange.201804083 Extreme Conditions: M5B12O25(OH): Structure, Luminescence, and Surprising Photocatalytic Properties Daniela Vitzthum, Klaus Wurst, Johann M. Pann, Peter Brüggeller, Markus Seibald, and Hubert Huppertz*
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