CAS Number 1234510-13-4
SPPO13, 2,7-Bis(diphenylphosphoryl)-9,9'-spirobifluorene, has a structure with an electron donating spirobifluorene core surrounded by two identical electron withdrawing diphenylphosphine oxide groups, while SPPO1 has only one diphenylphosphine oxide group attached to the spirobifluorene.
Due to its electron deficient nature, SPPO13 is used as an n-type solution-processable electron transporting material. SPPO13 could also be used as universal bipolar co-host for blue, green and red phosphors while blending with hole transporting materials such as tris(4-carbazoyl-9-ylphenyl)amine (TCTA).
| CAS number | 1234510-13-4 |
| Full name | 2,7-Bis(diphenylphosphoryl)-9,9'-spirobifluorene |
| Chemical formula | C49H34O2P2 |
| Molecular weight | 716.74 g/mol |
| Absorption | λmax 282 nm (in DCM) |
| Phosphorescene | λmax 373 nm (in DCM) |
| HOMO/LUMO | HOMO 5.90 eV, LUMO 2.60 eV [1] |
| Synonyms | 9,9'-spirobi[fluorene]-2,7-diylbis(diphenylphosphine oxide) |
| Classification / Family | Spirobifluorene derivatives, TADF Light-emitting diodes, Organic electronics, Electron transport Layer (ETL), PHOLEDs cohost materials, Sublimed materials. |
| Purity | >99.0% (HPLC) |
| Melting point | Tg = 123°C |
| Appearance | White powder/crystals |
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