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.

3,7-Dibromodibenzothiophene 5,5-dioxide

CAS Number 83834-12-2

Chemistry Building Blocks, Dibromo Monomers, Heterocyclic Building Blocks, Materials, Monomers

Product Code B991-250mg
Price £180 ex. VAT

High-Purity 3,7-Dibromodibenzothiophene 5,5-dioxide

A popular intermediate for the further synthesis of oligomers and polymers in the application organic electronics and hydrogen evolution reaction (HER).

Specifications | MSDS | Literature and Reviews

3,7-Dibromodibenzothiophene 5,5-dioxide (DBTDO), CAS number 83834-12-2, has a chemical structure of 4,4'-dibromo-1,1'-biphenyl with a Sulfonyl (SO2) bridge. With a structure that is topologically similar to that of fluorene, dibenzothiophene-S,S-dioxide is an electron-deficient moiety due to the electron-withdrawing character of the SO2 group.

With a rigid structure and excellent electron deficiency, 3,7-dibromodibenzothiophene 5,5-dioxide has been widely used as the building block for the electron acceptor moiety to form D–A type conjugated oligomers or polymers with high photocatalytic activity. In addition, due to the good hydrophilic nature of the dibenzothiophene dioxide group, the introduction can improve the dispersion of the targeting function materials in the aqueous solution, thereby improving the photocatalytic hydrogen evolution activity.

3,7-dibromodibenzothiophene 5,5-dioxide is prepared by brominating dibenzothiophene 5,5-dioxide with N-Bromosuccinimide (NBS) in concentrated sulfuric acid.

General Information

CAS Number 83834-12-2
Chemical Formula C12H6Br2O2S
Full Name 3,7-Dibromodibenzothiophene 5,5-dioxide
Molecular Weight 374.05 g/mol

3,7-Dibromodibenzothiophene Sulfone

3,7-Dibromodibenzothiophene S,S-dioxide


Classification / Family Dibromodibenzothiophene, semiconductor synthesis intermediates, low band gap polymers, OLED, OFETs, organic photovoltaics

Chemical Structure

3,7-Dibromodibenzothiophene 5,5-dioxide chemical structure, CAS 83834-12-2
3,7-Dibromodibenzothiophene 5,5-dioxide (DBTDO) chemical structure, CAS 83834-12-2

Product Details

Purity >99% (HPLC)
Melting Point Tm = 312 °C
Appearance White to off-white powder/crystals

MSDS Documentation

3,7-Dibromodibenzothiophene 5,5-dioxide3,7-Dibromodibenzothiophene 5,5-dioxide MSDS sheet

Literature and Reviews

  1. Synthesis of novel thiophene-phenylene oligomer derivatives with a dibenzothiophene-5,5-dioxide core for use in organic solar cells, S. Fujii et al., Phys. Status Solidi B, 249 (12), 2648-2651 (2012); DOI: 10.1002/pssb.201200439.
  2. Conjugated donor-acceptor polymer photocatalysts with electron-output “tentacles” for efficient hydrogen evolution, Z. Lan et al., Appl. Catal. B: Environ., 245 (15), 596-603 (2019); DOI: 10.1016/j.apcatb.2019.01.010.
  3. Dibenzothiophene Dioxide Based Conjugated Microporous Polymers for Visible-Light-Driven Hydrogen Production, Z. Wang et al., ACS Catal., 8 (9), 8590–8596 (2018); 10.1021/acscatal.8b02607.
Return to the top