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Updated: Dec 22, 2025
06:44
From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
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Stabilization and Solvent Driven Crystal-to-Crystal Transition between New Bismuth Halides.
Ramjee Kandel1,2, Gabriele Schatte1, Grace Cheng1
1Department of Chemistry, Queen's University, Kingston, Ontario Canada, K7L 3N6.
Inorganic Chemistry
|May 6, 2020
Summary
Researchers discovered a new solvent-stabilized bismuth compound, Cs3BiBr6·3DMSO, and a novel phase of Cs3BiBr6 via crystal-to-crystal transitions. These compounds feature isolated octahedral bismuth bromide structures, similar to 0D perovskites.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Crystallography
Background:
- Bismuth halides are crucial in materials science.
- Solvent effects on crystal structure are not fully understood.
- Understanding bismuth halide chemistry in mixed solvents is key for novel material discovery.
Purpose of the Study:
- To investigate bismuth halide chemistry in DMSO/MeOH solutions.
- To discover new bismuth halide compounds and phases.
- To characterize the crystal structures and transitions of these compounds.
Main Methods:
- Antisolvent crystal growth method for bulk single crystals.
- X-ray diffraction for crystal structure determination.
- Controlled variation of solvent composition (DMSO:MeOH ratios) to induce phase transitions.
Main Results:
- Discovery of a new solvent-stabilized compound, Cs3BiBr6·3DMSO, with an orthorhombic crystal structure.
- Observation of a crystal-to-crystal transition in Cs3BiBr6·3DMSO upon changing solvent composition.
- Formation of a new, structurally distinct Cs3BiBr6 phase with a tetragonal structure.
- Both compounds exhibit isolated BiBr6 octahedral units, characteristic of 0D perovskites.
Conclusions:
- Solvent composition critically influences the formation and structure of bismuth halide compounds.
- A novel solvent-stabilized bismuth bromide and a new Cs3BiBr6 phase were successfully synthesized and characterized.
- The discovered compounds share structural similarities with 0D perovskites, suggesting potential applications in related fields.
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