“Activated Borane” – A Porous Borane Cluster Polymer as an Efficient Lewis Acid-based Catalyst

08 August 2023, Version 1


Borane cluster based porous covalent networks, named activated borane (ActB), were prepared by co-thermolysis of decaborane(14) (nido-B10H14) and selected hydrocarbons (toluene – ActB-Tol, cyclohexane – ActB-cyHx, and n-hexane – ActB-nHx) under anaerobic conditions. These amorphous solid powders exhibit different textural and Lewis acid (LA) properties that vary depending on the nature of the constituent organic linker. For ActB-Tol, its LA strength even approaches that of the commonly-used molecular LA, B(C6F5)3. Most notably, ActBs can act as heterogeneous LA catalysts in hydrosilylation/deoxygenation reactions with various carbonyl substrates, as well as in the gas-phase dehydration of ethanol. These studies reveal the excellent potential of ActBs in catalytic applications, showing a) the possibility for tuning catalytic reaction outcomes (selectivity) in hydrosilylation/deoxygenation reactions by changing the material’s composition, and b) the very high activity toward ethanol dehydration that exceeds commonly used γ-Al2O3 by achieving a stable conversion of ~93 % with a selectivity for ethylene production of ~78 % during a 17 h continuous period on stream at 240°C.


Activated borane
Lewis acid
Tricoordinated borane
hydrosilylation reaction
deoxygenation reaction
dehydration of ethanol

Supplementary materials

Supporting Information
The Supporting Information file contains experimental part, additional tables and Figures for characterisation and catalysis.


Comments are not moderated before they are posted, but they can be removed by the site moderators if they are found to be in contravention of our Commenting Policy [opens in a new tab] - please read this policy before you post. Comments should be used for scholarly discussion of the content in question. You can find more information about how to use the commenting feature here [opens in a new tab] .
This site is protected by reCAPTCHA and the Google Privacy Policy [opens in a new tab] and Terms of Service [opens in a new tab] apply.