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, 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 B251-5g
Price £60 ex. VAT

2,7-Dibromo-9H-carbazole, high quality and high purity monomer

Popular candidate for the application of organic electronics

Specifications | MSDS | Literature and Reviews

2,7-dibromocarbazole (CAS number 136630-39-2), also known as 2,7-dibromo-9H-carbazole, is a building block for the synthesis of small molecules of carbazole series or carbazole back-boned polymers in the application of OFETs, OLEDs, PLEDs and OPVs.

Carbazole derivatives, small molecules or poly(2,7-carbazole)s, have been one of the most popular candidates for the application of organic electronics due to their well-known good electron-donating abilities and chemical stability comparing with fluorene units. Also, the functional group on the 9-position makes them chemically available to be easily adjustable to different aromatic or alkyl chains to allow solubility for devices film morphology or even further tuning the energy levels of such compounds.

One of the most popular products made available from 2,7-dibromocarbazole is PCDTBT, a well-known polymer semiconductor used for polymer solar cells. A good example for adjusting the solubility of the carbazole compounds by using 2,7-dibromocarbazole as the starting materials is the synthesis of 2,7-dibromo-9-heptadecanylcarbazole.

synthesis of dibromo-9-heptadecanylcarbazole using dibromocarbazole as starting material
Synthesis of 2,7-dibromo-9-heptadecanylcarbazole using 2,7-dibromocarbazole as starting material

General Information

CAS Number 136630-39-2
Chemical Formula C12H7Br2N
Molecular Weight 325.0 g/mol
Synonyms 2,7-Dibromo-9H-carbazole
Classification / Family Monomers, Building blocks, Carbazoles, Halogenated heterocycles, Chemical synthesis for low band gap polymers, Intermediates for semiconducting polymers 

Chemical Structure

2,7-dibromocarbazole, 136630-39-2
Chemical structure of 2,7-dibromocarbazole, CAS 136630-39-2

Product Details

Purity >99%
Melting Point 226 °C - 230 °C
Appearance Off-white powder

Characterisation by 1H-NMR (example)

1H NMR of 2-7-dibromocarbazole in CDCl3, 136630-39-2
1H NMR spectrum of 2,7-Dibromo-9H-carbazole in CDCl3 (view full version)

MSDS Documentation

2,7-Dibromocarbazole MSDS2,7-Dibromocarbazole MSDS sheet

Literature and Reviews

  1. Solution-processed blue phosphorescent OLEDs with carbazole-based polymeric host materials, F. Dumur et al., Org. Electronics 25, 21–30 (2015)
  2. Synthesis, Characterization, and Use as Emissive Layer of White Organic Light Emitting Diodes of the Highly Isotactic Poly(N-pentenyl-carbazole), A. Botta et al., poly. Composites, 1110-1117 (2015)
  3. A low bandgap carbazole based small molecule for organic solar cells, M. Li, et al., Org. Electronics 24, 89-95 (2015)
Return to the top