Product Code M2213A1
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2,7-Bis(9,9-spirobifluoren-2-yl)-9,9-spirobifluorene (TSBF) has three spirobifluorene joined at 2,7-positions. Exhibiting high glass transition temperatures (Tg = 231 °C), excellent thermal and color stabilities, spirobifluorene 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.

General Information

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

Product Details

Purity >99% (sublimed)
Melting point 457 °C (DSC, lit.), Tg = 231 °C (lit.)
Appearance 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 for OLED devices page.

518997-91-6, TSBF

Chemical structure of 2,7-Bis(9,9-spirobifluoren-2-yl)-9,9-spirobifluorene (TSBF)

MSDS Documentation



 Grade Order Code Quantity Price
Sublimed (>99% purity) M2213A1 500 mg £220.00
Sublimed (>99% purity) M2213A1 1 g £352.00

Literature and Reviews

  1. Optical Properties of Oligo(9,9-diarylfluorene) Derivatives in Thin Films and Their Application for Organic Light-Emitting Field-Effect Transistors,
    T. Oyamada et al., J. Phys. Chem. C 2007, 111, 1, 108-115 (2007); doi: 10.1021/jp0654056.
  2. Low amplified spontaneous emission threshold and suppression of electroluminescence efficiency roll-off in layers doped with ter(9,9′-spirobifluorene), M. Inoue et al., Appl. Phys. Lett. 108, 133302 (2016); dio: 10.1063/1.4945596.
  3. Ter(9,9-diarylfluorene)s: Efficient Blue Emitter with High Electrochemical,
    Morphological and Thermal Stability, K. Wong et al., J. Am. Chem. Soc., 124, 39, 11576-11577 (2002); doi: 10.1021/ja0269587.


To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.