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 info@ossila.com, 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 M2100A1-100mg
Price $300 ex. VAT

Quality assured

Expert support

Volume discounts

Worldwide shipping

Fast and secure


4CzIPN, highest PLQY compared to its isomers

Available online in sensible quantities for priority dispatch


4CzIPN, 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.

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.
  4. Solvent Effect on Thermally Activated Delayed Fluorescence by 1,2,3,5-Tetrakis(carbazol-9-yl)-4,6-dicyanobenzene, R. Ishimatsu et al., J. Phys. Chem. A, 117, 5607−5612 (2013); DOI: 10.1021/jp404120s.
  5. A Fluorescent Organic Light-Emitting Diode with 30% External Quantum Efficiency, J-W. Sun et al., Adv. Mater., 26, 5684–5688 (2014); DOI: 10.1002/adma.201401407.
  6. High Efficiency in a Solution-Processed Thermally Activated Delayed-Fluorescence Device Using a Delayed-Fluorescence Emitting Material with Improved Solubility, Y-J. Cho et al., Adv. Mater., 26, 6642–6646 (2014); DOI: 10.1002/adma.201402188.
  7. High-Performance Green OLEDs Using Thermally Activated Delayed Fluorescence with a Power Effi ciency of over 100 lmW−1, Y. Seino et al; Adv. Mater., 28, 2638–2643 (2016); DOI: 10.1002/adma.201503782.

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 Optical 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

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

Return to the top