4,4',4''-(Benzene-1,3,5-triyltris(ethyne-2,1-diyl))tribenzaldehyde, often shortened to BTETBA (CAS 2289758-98-9), is an electron-rich C3-type aldehyde monomer used as a linker for covalent organic frameworks (COFs). Its structure places three 4-formylphenylethynyl arms at the meta positions of a central benzene ring, giving a trigonal building block for cross-linked COF networks. It is supplied at >97% purity as a white to off-white powder or fibrous/crystalline solid.
In published work, the ethynyl bridges built into the conjugated backbone of the metal-free BTETBA-COF improved π-conjugation as well as the separation and transfer of photogenerated charges. This framework photoreduced CO2 in a solid-gas setup using only CO2 and water vapour, reaching a CO production rate of 382.0 µmol g−1 h−1, among the highest reported for additive-free catalysts.
A related framework, BTETBA-TRz-COF, combines spatially separated triazine and acetylene units with carbon-carbon double bond linkages. This arrangement suppresses charge recombination and supports electron transport through the skeleton, making it effective for photocatalytic H2O2 production.
- Synthesis of covalent organic frameworks using a trigonal aldehyde linker.
- Preparation of metal-free COF photocatalysts for CO2 reduction with water vapour.
- Construction of triazine- and acetylene-containing COFs for photocatalytic H2O2 production.
- Research on sp2-carbon-linked COFs with tuned π-conjugation and charge separation.
| Brand | Ossila |
|---|---|
| CAS number | 2289758-98-9 |
| Molecular formula | C33H18O3 |
| Purity | >97% |
| Category | — |
| Pack sizes | 500 mg, 1 g, 5 g |
| Physical form | White to off-white powder to fibers/crystals |
| Storage | — |
- Product code: B3831
- Molecular Weight: 462.49 g/mol
- Synonyms: BTETBA, BTEA, TPEB-CHO, BTTA, 1,3,5-tris(4-formylphenylethynyl)benzene
- Classification / Family: Phenylethynylbenzene, COF ligands
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