2,5-Dibromo-3-chlorothiophene (CAS 32431-91-7) is an electron-deficient thiophene derivative carrying a chlorine substituent at the 3-position and bromine atoms at the 2- and 5-positions. Supplied by Ossila at >97% purity as an off-white powder or crystals, it serves as a building block for organic semiconductor synthesis, particularly materials for OLEDs and organic photovoltaics.
The two terminal bromides together with the chloride make the molecule well suited to straightforward coupling reactions. Researchers have used it to prepare highly efficient polymer semiconductors with medium to wide bandgaps, such as PTCl. These polymers are highly soluble and can be processed from toluene, THF and xylenes, supporting greener, lower-cost solution processing of organic solar cells.
Published work on chlorinated thiophene-based donor polymers for nonfullerene solar cells, including studies in Solar RRL (2019 and 2020), describes the use of this intermediate. The compound has a molecular weight of 276.38 g/mol and melts at 24 °C - 25 °C.
- Synthesis of medium to wide bandgap polymer semiconductors such as PTCl.
- Preparation of chlorinated thiophene-based donor polymers for nonfullerene organic solar cells.
- Building block for OLED and organic photovoltaic materials.
- Monomer for coupling reactions via its bromide end groups.
- Development of soluble polymers processable in toluene, THF and xylenes for eco-friendly solution processing.
| Brand | Ossila |
|---|---|
| CAS number | 32431-91-7 |
| Molecular formula | C4HBr2ClS |
| Purity | >97% |
| Category | — |
| Pack sizes | 1 g, 5 g, 10 g, 25 g |
| Physical form | Off-white powder/crystals |
| Storage | — |
- Product code: B761
- Molecular Weight: 276.38 g/mol
- Synonyms: Thiophene, 2,5-dibromo-3-chloro-
- Classification / Family: Thiophene derivatives, Organic semiconducting materials intermediates, Semiconductor Synthesis, Organic Photovoltaics
- Melting Point: 24 °C - 25 °C
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