Order Code: M2118A1
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 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

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.


acrsa chemical structure
Chemical structure of ACRSA; CAS No. 1206626-95-0.



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.


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.


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.