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Product Code M2100A1-100mg
Price $312 ex. VAT

4CzIPN, highest PLQY compared to its isomers

Available online in sensible quantities for priority dispatch


Product Information | MSDS | Literature


4CzIPN (CAS number 1416881-52-1), namely 1,2,3,5-Tetrakis(carbazol-9-yl)-4,6-dicyanobenzene, has a fully substituted benzene ring with two cyano groups as electron accepting units at meta-positions to each other and four carbazolyl groups as electron donating units. It is a powerful metal-free organophotocatalyst and also a typical donor–acceptor fluorophore.

Ossila's 4CzIPN used in a high-impact paper

4CzIPN from Ossila was used in the high-impact paper (IF 15.72), A comprehensive picture of roughness evolution in organic crystalline growth: the role of molecular aspect ratio, J. Dull et al., Mater. Horiz., 9, 2752 (2022); DOI: 10.1039/d2mh00854h.

Out of its three isomers, 4CzIPN has the highest photo-luminescence quantum efficiency (PLQY) of above 90%. This is due to the wide dispersion the highest-occupied molecular orbital (HOMO) over the donor moieties. Relatively short excited-state lifetime of delayed emission was reported. Additionally, higher external quantum efficiency (EQE) was observed by using 4CzIPN as an emitter in TADF-OLED devices.

Despite its low solubility in most of the aromatic solvents, 4CzIPN is also solution-processable in solvents such as dichloromethane or chloroform. This is due to the structure distortion of the carbazole units caused by steric hindrance.

General Information


CAS Number 1416881-52-1
Full Name 1,2,3,5-Tetrakis(carbazol-9-yl)-4,6-dicyanobenzene
Chemical Formula C56H32N6
Molecular Weight 788.89 g/mol
Absorption* λmax 365 nm in acetonitrile
Fluorescence λem 551 nm in acetonitrile
HOMO/LUMO HOMO = 5.8 eV, LUMO = 3.4 eV [1]
Synonyms 2,4,5,6-Tetra(9H-carbazol-9-yl)isophthalonitrile
Classification / Family Carbazole, TADF green emitter materials, Phosphorescent organic light-emitting devices (PHOLEDs), Photocatalyst, Sublimed materials

* Measurable with the Ossila USB Spectrometer, see our Spectrometers and Spectroscopy Accessories for more information.

Product Details


Purity Unsublimed >98% (1H NMR); Sublimed >99.0% (HPLC)
Melting Point TGA: >300 °C (0.5% weight loss)
Appearance Orange-yellow powder/crystals

Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials.

Chemical Structure


chemical structure of 4CzIPN
Chemical Structure of 2,4,5,6-Tetra(9H-carbazol-9-yl)isophthalonitrile (4CzIPN)

Device Structure(s)


Device structure ITO (70 nm)/(4 wt% ReO 3 ):mCP (50 nm)/mCP (15 nm)/mCP:B3PyMPM:(5 wt% 4CzIPN) (30 nm)/B3PYMPM (20 nm)/(4 wt% Rb2CO3):B3PYMPM (35 nm)/Al (100 nm) [3]
Colour green light emitting device Green
Max. Current Efficiency 94.5 cd/A
Max. EQE 29.6%
Max. Power Efficiency 88.6 Im/W
Device structure ITO (50 nm)/PEDOT:PSS (60 nm)/poly(9-vinylcarbazole) (15 nm)/SiCz:4CzIPN (30 nm)/TSPO1 (35 nm)/LiF (1 nm)/Al (200 nm) [4]
Colour green light emitting device Green
Max. EQE 26%
Max. Power Efficiency 63.4 Im/W
Device structure ITO(130 nm)/TAPC (35 nm)/CBP (5 nm)/5 wt% 4CzIPN doped CBP (5 nm)/B4PyPPM (65 nm)/LiF (0.8 nm)/Al (100 nm) [5]
Colour green light emitting device Green
Max. Current Efficiency 83.2 cd/A
Max. EQE 25.7%
Max. Power Efficiency 106.9 Im/W

MSDS Documentation


4CzIPN MSDS4CzIPN MSDS Sheet

Pricing Table


Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2100A1 100 mg £240
Sublimed (>99.0% purity) M2100A1 250 mg £480
Sublimed (>99.0% purity) M2100A1 500 mg £760
Sublimed (>99.0% purity) M2100A1 1 g £1200
Unsublimed (>98.0% purity) M2100B1 250 mg £230
Unsublimed (>98.0% purity) M2100B1 500 mg £370
Unsublimed (>98.0% purity) M2100B1 1 g £580

Literature and Reviews


  1. A comprehensive picture of roughness evolution in organic crystalline growth: the role of molecular aspect ratio, J. Dull et al., Mater. Horiz., 9, 2752 (2022); DOI: 10.1039/d2mh00854h.
  2. Recent advances of 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) in photocatalytic transformations, T. Shang et al., Chem. Commun., 55, 5408-5419 (2019); DOI: 10.1039/C9CC01047E.
  3. Promising operational stability of high-efficiency organic light-emitting diodes based on thermally activated delayed fluorescence, H. Nakanotani et al., Sci Rep., 3: 2127 (2013); doi: 10.1038/srep02127.

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