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Product Code M2381B1-250mg
Price £240 ex. VAT

A TADF yellow emitter, assistant host and photocatalyst

Used as an assistant dopant for highly efficient hyperfluorescent or as solo emitter for TADF devices.


Specifications | Pricing and Options | MSDS | Literature and Reviews


4CzIPN-tBu (CAS number 1630263-99-8), also known as 2,4,5,6-tetrakis(3,6-di-tert-butylcarbazol-9-yl)-1,3-dicyanobenzene, a donor-acceptor type molecule composed of dicyanobenzene and tert-butyl-substituted carbazolyl groups around the benzene ring.

4CzIPN-tBu is slightly red-shifted in absorption while comparing to that of 4CzIPN as the eight tert-butyl groups improve the donor strength of the carbazole units thus altering the donor–acceptor interaction. Also, due to the bulkier peripheral tert-butyl groups increasing steric effects, 4CzIPN-tBu experiences weaker intermolecular interactions in the solid-state.

Remarkably, the electrogenerated chemiluminescence (ECL) efficiency of 4CzIPN-tBu in dichloromethane reached almost 40% and stable electrogenerated chemiluminescence was observed from 4CzIPN-tBu due to the fact that polymerization is inhibited by the steric hindrance of the bulky tert-butyl groups at 3,6-postion of the carbazoles.

Solution-processed hyperfluorescent devices with an external quantum efficiency (EQE) of 15.3% using cibalackrot as the fluorescent emitter and 4CzIPN-tBu as the TADF assistant host in CBP. These sterically hindered tert-butyl groups effectively reduced losses caused by triplet diffusion between the TADF assistant host and the fluorescent emitter by spatially separating adjacent molecules and making a concurrent frontier molecular orbital (FMO) less likely [1].

General Information


CAS Number 1630263-99-8
Full Name 2,4,5,6-Tetrakis(3,6-di-tert-butylcarbazol-9-yl)-1,3-dicyanobenzene
Synonyms 4CzIPN-Bu, t4CzIPN, 2,4,5,6-Tetrakis(3,6-di-tert-butyl-9H-carbazol-9-yl)-1,3-benzenedicarbonitrile, 2,4,5,6-Tetrakis(3,6-di-tert-butyl-9H-carbazol-9-yl)isophthalonitrile
Chemical Formula C88H96N6
Molecular Weight 1237.74 g/mol
Absorption* λmax 389 nm in film
Photoluminescence λem 550 nm in film
HOMO/LUMO HOMO = 5.70 eV, LUMO = 3.30 eV [1]
Classification / Family Carbazole derivative, TADF materials, Yellow dopant materials, Sublimed materials

Chemical Structure


4CzIPN-t chemical structure, 1630263-99-8
Chemical Structure of 2,4,5,6-Tetra(3,6-di-tert-butylcarbazol-9-yl)-1,3-dicyanobenzene (4CzIPN-tBu), CAS 1630263-99-8

Product Details


Purity Unsublimed >98.0% (1H NMR)
Melting Point N/A
Appearance Orange powder/crystals

Device Structure(s)


Device Structure ITO (100 nm)/PEDOT:PSS (30 nm)/Cibalackrot:4CzIPN-tBu:mCBP (0.5:29.5:70 mol%, 35 nm)/TPBi (65 nm)/Liq (2 nm)/Al (100 nm) [1]
Colour red light emitting device  Red
Max. Brightness 4595 cd/m2
Max. EQE 15.3%

Device Structure ITO (100 nm)/PEDOT:PSS (30 nm)/4CzIPN-tBu:mCBP (30:70 mol%, 35 nm)/TPBi (65 nm)/Liq (2 nm)/Al (100 nm) [2]
Colour yellow light emitting device  Greenish Yellow
Max. Brightness 15,700 cd/m2
Max. EQE 10.7%

Device Structure ITO (100 nm)/PEDOT:PSS (30 nm)/6,6’-Cibalackrot:4CzIPN-tBu:mCBP (0.5:29.5:70 mol%, 35 nm)/TPBi (65 nm)/Liq (2 nm)/Al (100 nm) [2]
Colour red light emitting device  Red
Max. Brightness 11,920 cd/m2
Max. EQE 10.7% 

Device Structure ITO (100 nm)/PEDOT:PSS (30 nm)/5,5’-Cibalackrot:4CzIPN-tBu:mCBP (0.5:29.5:70 mol%, 35 nm)/TPBi (65 nm)/Liq (2 nm)/Al (100 nm) [2]
Colour red light emitting device  Red
Max. Brightness 12,440 cd/m2
Max. EQE 12.5%

Pricing


Grade Order Code Quantity Price
Unsublimed (>98.0% purity) M2381 250 mg £240
Unsublimed (>98.0% purity) M2381 500 mg £400
Unsublimed (>98.0% purity) M2381 1 g £640

MSDS Documentation


4CzIPN-tBu4CzIPN-tBu MSDS Sheet

Literature and Reviews


  1. High-performance solution-processed red hyperfluorescent OLEDs based on cibalackrot, N. Wallwork et al., J. Mater. Chem. C, 10, 4767-4774 (2022); DOI: 10.1039/D1TC04937B.
  2. Cibalackrot Dendrimers for Hyperfluorescent Organic Light-Emitting Diodes, N. Wallwork et al., Macromol. Rapid Commun., 43 (16), 2200118 (2022); DOI: 10.1002/marc.202200118.
  3. Photophysical Properties and Efficient, Stable, Electrogenerated Chemiluminescence of Donor–Acceptor Molecules Exhibiting Thermal Spin Upconversion, R. Ishimatsu et al., Chem. Euro. J., 22 (14), 4889-4898 (2016); DOI: 10.1002/chem.201600077.
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