3,3',6,6'-Tetrabromo-9,9'-bicarbazole (TBBCz, CAS 18628-03-0) is a brominated bicarbazole building block used to make covalent organic frameworks (COFs) and related porous materials. Its two carbazole units are linked through a nitrogen-nitrogen bond at the 9,9'-positions, and bromine atoms sit at the 3,3',6,6'-positions. The result resembles two 3,6-dibromocarbazole molecules fused into a butterfly-shaped core.
The four bromo groups make TBBCz a convenient starting point for boronic esterification and Suzuki coupling, allowing it to be built into cross-linked framework networks. Frameworks derived from bicarbazole cores have been studied for acetylene capture and separation, flame retardancy, energy storage and hydrogen chloride sensing. Reported examples include the MOF FJU-83a, with a C2H2 uptake of 122.9 cm3/g, and the microporous COF Car-CFT-5-500, with a specific surface area of 1,400 m2/g and a capacitance of 545 F/g at 5 mV/s.
Ossila supplies this material at >98% purity as a white to off-white powder or crystals.
- Precursor for cross-linked covalent organic frameworks built via Suzuki or boronic esterification reactions.
- Ligand source for bicarbazole-based metal-organic frameworks studied for C2H2 separation from CO2 and CH4.
- Building block for porous frameworks and polymers investigated for energy storage electrodes.
- Starting material for fluorescent COFs explored as hydrogen chloride sensors.
- Component in research on framework additives that improve flame retardancy of epoxy composites.
| Brand | Ossila |
|---|---|
| CAS number | 18628-03-0 |
| Molecular formula | C24H12Br4N2 |
| Purity | > 98% |
| Category | — |
| Pack sizes | 250 mg, 500 mg, 1 g |
| Physical form | White to off-white powder/crystals |
| Storage | — |
- Product code: B4661
- Molecular Weight: 647.98 g/mol
- Synonyms: TBBCz, BC-4Br, 3,6-Dibromo-9-(3,6-dibromocarbazol-9-yl)carbazole
- Classification: Bicarbazole, Heterocyclic building blocks, COF ligands
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