4CzIPN (1,2,3,5-Tetrakis(carbazol-9-yl)-4,6-dicyanobenzene, CAS 1416881-52-1) is a donor–acceptor fluorophore and a metal-free organophotocatalyst. Its benzene core is fully substituted, carrying four electron-donating carbazolyl groups and two electron-accepting cyano groups placed meta to each other. Product code M2100A1 is the sublimed grade, with purity above 99.0% by HPLC, supplied as an orange-yellow powder or crystals.
Among its three isomers, 4CzIPN shows the highest photoluminescence quantum yield, above 90%, which is attributed to the HOMO being widely spread over the donor units. A relatively short delayed-emission excited-state lifetime has been reported, and TADF-OLEDs using it as the emitter have shown higher external quantum efficiency. Reported green devices reach a maximum EQE of 29.6%.
Although poorly soluble in most aromatic solvents, it can be solution-processed from dichloromethane or chloroform, thanks to steric distortion of the carbazole units.
- Green emitter in thermally activated delayed fluorescence (TADF) OLED devices.
- Metal-free organophotocatalyst for photocatalytic transformations.
- Solution-processed emissive layers deposited from dichloromethane or chloroform.
- Research on organic crystalline thin-film growth and photon upconversion.
| Brand | Ossila |
|---|---|
| CAS number | 1416881-52-1 |
| Molecular formula | C56H32N6 |
| Purity | Sublimed >99.0% (HPLC) |
| Category | — |
| Pack sizes | 100 mg, 250 mg, 500 mg, 1 g |
| Physical form | Orange-yellow powder/crystals |
| Storage | — |
- Product code: M2100A1
- Full Name: 1,2,3,5-Tetrakis(carbazol-9-yl)-4,6-dicyanobenzene
- Synonym: 2,4,5,6-Tetra(9H-carbazol-9-yl)isophthalonitrile
- Molecular Weight: 788.89 g/mol
- Absorption: λmax 365 nm in acetonitrile
- Fluorescence: λem 551 nm in acetonitrile
- HOMO/LUMO: HOMO = 5.8 eV, LUMO = 3.4 eV
- Thermal Stability: TGA: >300 °C (0.5% weight loss)
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