ACRSA, or 10-Phenyl-10H,10′H-spiro[acridine-9,9′-anthracen]-10′-one (CAS 1206626-95-0), is a blue-greenish emitter for OLED and organic electronics research. It belongs to a small group of spiro compounds that show efficient thermally activated delayed fluorescence (TADF). It is supplied as sublimed material with >99.0% purity (HPLC), appearing as off-white crystals or powder.
The molecule pairs an electron-donating acridine unit with an electron-accepting anthracenone unit. A spiro-junction joins the two so that their π systems sit orthogonal to each other, giving a weakly coupled bichromophoric structure. This design yields a small singlet-triplet gap (ΔE ST) of 0.03 eV, with absorption at λ max 430 nm and emission at λ em 490 nm.
In reported devices with a DPEPO host, ACRSA reached a maximum EQE of 16.4% in bluish-green OLEDs. As a sensitizer for TBPe in blue devices it gave a maximum EQE of 13.4% and a current efficiency of 27 cd/A. Ossila ACRSA was used in the study by K. Stavrou et al., Nat. Photon., 18, 554–561 (2024), on hyperfluorescence OLEDs.
- Emitting dopant in bluish-green TADF organic light-emitting diodes.
- Sensitizer for fluorescent emitters in hyperfluorescence OLED architectures.
- Research into reverse intersystem crossing and triplet-state behaviour in TADF emitters.
- Development of organic electronics using sublimed high-purity materials.
| Brand | Ossila |
|---|---|
| CAS number | 1206626-95-0 |
| Molecular formula | C32H21NO |
| Purity | Sublimed >99.0% (HPLC) |
| Category | — |
| Pack sizes | 250 mg, 500 mg, 1 g |
| Physical form | Off-white crystals/powder |
| Storage | — |
- Product code: M2118A1
- Molecular weight: 435.52 g/mol
- Absorption: λ max 430 nm
- Fluorescence: λ em 490 nm
- Energy levels: ΔE ST = 0.03 eV (E S1 = 2.55 eV, E T1 = 2.52 eV)
- Thermal stability: TGA: >250 °C (0.5% weight loss)
- Product code: M2118A1
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