FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.

Product Code M2213A1-500mg
Price £290 ex. VAT

TSBF, fluorescent host material for OLED devices

Low price, high-purity (>99.0%) and available online for priority dispatch

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.

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 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.

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 £290
Sublimed (>99% purity) M2213A1 1 g £460

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.
Return to the top