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Product Code M2118A1
Price £180.00

10-phenyl-10H,10′H-spiro[acridine-9,9′-anthracen]-10′-one (ACRSA) is one of the few spiro compounds known to exhibit efficient thermally activated delayed fluorescence (TADF). Its bichromophoric structure consists of a weakly-coupled acridine moiety as an electron-donating unit and an anthracenone moiety as an electro-accepting group. These are covalently linked by a spiro-junction in such a way that the respective π systems are orthogonal. 

ACRSA is also known as an aromatic ketone-derived green emitter with a relatively small ΔEST of 0.03 eV.

General Information

CAS number 1206626-95-0
Chemical formula C32H21NO
Molecular weight 435.52 g/mol
Absorption λmax 430 nm
Fluorescene λem 490 nm
HOMO/LUMO ΔEST = 0.03 eV (ES1 = 2.55 eV, ET1 = 2.52 eV) [1]
Synonyms 10-phenyl-10H,10′H-spiro[acridine-9,9′-anthracen]-10′-one
Classification / Family Acridine derivatives, Green emitter, Light-emitting diodes, Organic electronics, TADF materials, Sublimed materials.

Product Details

Purity Sublimed >99.0% (HPLC)
Melting point

TGA: >250 °C (0.5% weight loss)

Appearance Off-white crystals/powder

*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.

Chemical Structure

acrsa chemical structure
Chemical structure of ACRSA

Device Structure(s)

Device structure ITO/a-NPD (40 nm)/mCP (10 nm)/20 wt% ACRSA:DPEPO (15 nm)/DPEPO (3.5 nm)/TPBi (41.5 nm)/LiF (0.8 nm)/Al (80 nm) [1]
Colour Blue - greenish blue
Max EQE 16.4%
Max. Photo-luminescence 81%
Device structure ITO/a-NPB (35 nm)/mCP (10 nm)/1 wt%-TBPe: 15wt%-ACRSA: DPEPO (15 nm)/DPEPO (8 nm)/TPBi (57 nm)/LiF (0.8 nm)/Al (100 nm) [2]
Colour Blue blue
Max Current Efficiency 27 cd/A 
Max EQE 13.4%
Max. Power Efficiency 18 lm W-1

*For chemical structure information, please refer to the cited references.


 Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2118A1 250 mg £180.00
Sublimed (>99.0% purity) M2118A1 500 mg £304.00
Sublimed (>99.0% purity) M2118A1 1 g £518.00

MSDS Documentation


Literature and Reviews

  1. A highly luminescent spiro-anthracenone-based organic light-emitting diode exhibiting thermally activated delayed fluorescence, K. Nasu et al., Chem. Comm. 49, 10385 (2013); DIO: 10.1039/C3CC44179B.
  2. High-efficiency organic light-emitting diodes with fluorescent emitters, H. Nakanotani et al., Nat. Commun., 5:4016 (2014); DOI: 10.1038/ncomms5016.
  3. Climbing up the Ladder: Intermediate Triplet States Promote the Reverse Intersystem Crossing in the Efficient TADF Emitter ACRSA, I. Lyskov et al., J. Phys. Chem. C, 121, 21145−21153 (2017); DOI: 10.1021/acs.jpcc.7b06187.

To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, pharmaceuticals, cosmetics, food or commercial applications.

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