1,3,5-Tris(4-ethynylphenyl)benzene, also known as TEPB (CAS 71866-86-9), is a trigonal terphenyl building block used as a linker in covalent organic frameworks (COFs) and porous conjugated polymers (PCPs). Its central benzene ring carries three 4-ethynylphenyl arms in meta positions, giving three terminal alkyne groups for constructing cross-linked, semiconducting networks.
The terminal alkynes make TEPB well suited to click chemistry and Sonogashira coupling. In one reported example, coupling TEPB with 2,7-dibromodibenzo[b,d]thiophene 5,5-dioxide gave the microporous polymer PCP-SO-TPB, which showed high BET surface area, strong CO2/N2 selectivity and broad visible-light absorption, producing carbon monoxide at 40.12 μmol h−1 g−1 with nearly 100% selectivity and no sacrificial reagent or cocatalyst.
Oxidative coupling of TEPB has also produced 1,3-diyne-linked conjugated microporous polymer nanosheets that generate hydrogen under visible light with a quantum efficiency of 10.3% at 420 nm. Ossila supplies the material at >97% purity as an off-white to yellow powder or crystals.
- Linker for synthesising semiconducting covalent organic frameworks and porous conjugated polymers.
- Building porous polymers for photocatalytic reduction of CO2 to carbon monoxide.
- Preparing conjugated microporous polymer nanosheets for visible-light hydrogen production and water splitting.
- Developing conjugated polymer electrochemical sensors for hydrogen peroxide detection.
- Designing porous organic polymers for organic battery cathodes.
| Brand | Ossila |
|---|---|
| CAS number | 71866-86-9 |
| Molecular formula | C30H18 |
| Purity | >97% |
| Category | — |
| Pack sizes | 1 g, 5 g |
| Physical form | Off white to yellow powder/crystals |
| Storage | — |
- Product code: B3791
- Molecular Weight: 378.46 g/mol
- Synonyms: TEPB, 4,4''-Diethynyl-5'-(4-ethynylphenyl)-1,1':3',1''-terphenyl
- Classification / Family: Terphenyl, COF ligands
- Melting Point: 210 °C
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