Bismuth gallate coordination networks inspired by an active pharmaceutical ingredient
Erik Svensson Grape1, Victoria Rooth1, Simon Smolders2
1Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91, Sweden. andrew.inge@mmk.su.se.
Dalton Transactions (Cambridge, England : 2003)
|September 5, 2022
Summary
Solvent choice influences bismuth gallate synthesis, yielding novel metal-organic frameworks (MOFs) and coordination polymers. Methanol enables MOF formation and a stable layered phase, useful as a Lewis acid catalyst.
Area of Science:
- Materials Chemistry
- Crystallography
- Catalysis
Background:
- Bismuth subgallate, a water-based compound, has served as an active pharmaceutical ingredient (API) for over a century.
- The synthesis of bismuth gallate compounds is sensitive to reaction conditions, particularly the solvent used.
Purpose of the Study:
- To investigate the effect of different solvents on the synthesis of bismuth gallate compounds.
- To explore the structural diversity and potential catalytic applications of novel bismuth gallate materials.
Main Methods:
- Solvent-assisted synthesis of bismuth gallate compounds using methanol and ethanol.
- Structural determination using three-dimensional electron diffraction.
- Catalytic evaluation of the synthesized layered bismuth gallate for styrene oxide conversion.
Main Results:
- Methanol solvent yielded a flexible 3-periodic metal-organic framework (MOF) that transformed into a layered 2-periodic coordination polymer.
- Ethanol solvent exclusively produced the MOF phase.
- The layered bismuth gallate demonstrated stability and acted as an effective Lewis acid catalyst for regioselective styrene oxide conversion.
Conclusions:
- The choice of solvent critically controls the resulting structure and periodicity of bismuth gallate compounds.
- Novel MOFs and coordination polymers can be synthesized from existing API components by tuning synthesis parameters.
- The layered bismuth gallate exhibits potential as a stable and selective Lewis acid catalyst, indicating accessible open metal sites.
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