CAS Number 518997-91-6
2,7-Bis(9,9-spirobifluoren-2-yl)-9,9-spirobifluorene (TSBF) has three spirobifluorene joined at 2,7-positions. Spirobifluorenes exhibit high glass transition temperatures (Tg = 231 °C) and excellent thermal and color stabilities. Therefore, derivatives such as Spiro-OMeTAD are well sought for in OLED devices.
Being sterically hindered, TSBF is normally used as fluorescent host material in OLED devices With low threshold of amplified spontaneous emission(ASE) and suppressed electroluminescence efficiency roll-off, TSBF is also a promising candidate for realising electrically pumped organic semiconductor laser diodes.
| CAS number | 518997-91-6 |
|---|---|
| Chemical formula | C75H44 |
| Molecular weight | 945.15 g/mol |
| Absorption | 350 nm in THF |
| Fluorescence | 415 nm in THF |
| HOMO/LUMO | HOMO = 6.1 eV, LUMO = 3.0 eV [1] |
| Full name | 2,7-Bis(9,9-spirobifluoren-2-yl)-9,9-spirobifluorene |
| Synonyms | 2,2'':7'',2''''-Ter-9,9'-spirobi[9H-fluorene] |
| Classification / Family | Spirobifluorene, Blue emitter, Fluorescent host materials, Electron transport layer (ETL), OLED materials, OFET materials, Laser diodes, Materials science |
| Purity | >99% (sublimed) |
|---|---|
| Melting point | 457 °C (DSC, lit.), Tg = 231 °C (lit.) |
| Appearance | White to off-white powder/crystals |
*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the Sublimed Materials.
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