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 blue-greenish emitter with a relatively small ΔEST of 0.03 eV.

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CAS number	1206626-95-0
Chemical formula	C32H21NO
Molecular weight	435.52 g/mol
Absorption*	λmax 430 nm
Fluorescence	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, Greenish blue emitter, Light-emitting diodes, Organic electronics, TADF materials, Sublimed materials.

* Measurable with an optical spectrometer

Product Details

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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, see sublimed materials.

Chemical Structure

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Chemical structure of ACRSA, 10-phenyl-10H,10′H-spiro[acridine-9,9′-anthracen]-10′-one, CAS number: 1206626-95-0

Device Structure(s)

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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	Bluish-Green
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
Max Current Efficiency	27 cd/A
Max EQE	13.4%
Max. Power Efficiency	18 lm W-1