4CzPN-tBu (3,4,5,6-tetrakis(3,6-di-t-butylcarbazol-9-yl)-1,2-dicyanobenzene, CAS 1469705-93-8) is a carbazolyl benzonitrile derivative that serves as a highly efficient thermally activated delayed fluorescence (TADF) green emitter and photosensitizer. It is offered in unsublimed (>98.0%, 1H NMR) and sublimed (>99%, HPLC) grades as an orange powder or crystals.
Its structure is built on a phthalonitrile core, with four carbazole units placed adjacent and opposite to the two nitrile groups on the benzene ring. Bulky tert-butyl groups at the 3,6-positions of each carbazole improve solubility and suppress dimer and excimer formation between carbazoles, which helps limit exciton quenching.
Because its triplet energy is thermally accessible, 4CzPN-tBu can act as a triplet photosensitizer without heavy atoms, enabling visible-to-ultraviolet photon up-conversion through triplet-triplet annihilation (TTA). Among 4CzPN-R derivatives, luminescence intensity falls in the order H > tBu > Ph.
- Green or orange TADF dopant for organic light-emitting diode research.
- Heavy-atom-free triplet photosensitizer for visible-to-ultraviolet photon up-conversion via triplet-triplet annihilation.
- Organic photosensitizer in photocatalysis studies, including photocatalytic water reduction.
- Energy transfer photocatalyst for [2+2] photodimerization research.
| Brand | Ossila |
|---|---|
| CAS number | 1469705-93-8 |
| Molecular formula | C88H96N6 |
| Purity | Unsublimed >98.0% (1H NMR), Sublimed >99% (HPLC) |
| Category | — |
| Pack sizes | — |
| Physical form | Orange powder/crystals |
| Storage | — |
- Product code: M2379B1
- Full Name: 3,4,5,6-tetrakis(3,6-di-t-butylcarbazol-9-yl)-1,2-dicyanobenzene
- Synonyms: 4TCzTPN, 4CzPN-Bu
- Molecular Weight: 1237.74 g/mol
- HOMO/LUMO: HOMO = ~5.8 eV, LUMO = ~3.4 eV (estimated with 4CzPN as reference)
- Classification / Family: Carbazole derivatives, Phthalonitriles, TADF materials, Green dopant materials, Orange dopant materials, Sublimed materials
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