3,7-Dibromo-10H-phenothiazine (37DBrPTz, CAS 21667-32-3) is a 10H-phenothiazine carrying bromine atoms at the symmetric 3 and 7 positions. Supplied by Ossila as a pale green to beige powder with purity above 98%, it serves as a heterocyclic building block for organic electronic and energy materials.
The phenothiazine core adopts a non-planar butterfly shape that limits intramolecular aggregation and helps prevent excimer formation. Its electron-rich nitrogen and sulfur atoms give it a stronger donor character than amines such as triphenylamine, tetrahydroquinoline and carbazole, which is why phenothiazine derivatives appear widely in dye-sensitized solar cells and battery research. A zinc battery built on the derivative PTZAN reached 2000 cycles, 1.3 V, 145 mAh g−1 and 187.2 Wh kg−1.
The compound is also a precursor for self-assembled monolayers such as Br-2EPT, used as a hole-selective contact between the anode and perovskite layer. p-i-n perovskite cells with this interface reached a power conversion efficiency of up to 22.44% (certified 21.81%). Phenothiazine compounds are also known for their bioactivity.
- Synthesis of donor materials for dye-sensitized solar cells (DSSCs).
- Preparation of hole-selective self-assembled monolayers such as Br-2EPT for p-i-n perovskite solar cells.
- Building block for p-type organic electrode materials in zinc battery research.
- Precursor for phenothiazine-based hole injection polymers for polymer light-emitting diodes.
| Brand | Ossila |
|---|---|
| CAS number | 21667-32-3 |
| Molecular formula | C12H7Br2NS |
| Purity | > 98% |
| Category | — |
| Pack sizes | 5 g, 10 g, 25 g |
| Physical form | Pale green to beige powder |
| Storage | — |
- Product code: B4671
- Molecular Weight: 357.07 g/mol
- Synonyms: 37DBrPTz, Thiodiphenylamine, Dibenzothiazine, Dibenzoparathiazine
- Classification: 10H-phenothiazine, Heterocyclic building blocks, SAMs
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