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Product Code B891-1g
Price £170 ex. VAT

Bithiophene derivate, BT-C12-2Br

Commonly used for the synthesis of polymer semiconductors PBTTT-C12 and PQT12


Specifications | MSDS | Literature and Reviews


BT-C12-2Br, or 5,5′-Dibromo-4,4′-didodecyl-2,2′-bithiophene (CAS number 753470-95-0), is a bithiophene derivate with unbranched dodecyl alkyl (C12) side chains. Dodecyl alkyl chains can not only enhance solubility of the targeted semiconducting polymers, but also promote film morphology with better intermolecular packing and π–π stacking.

BT-C12-2Br has been widely used for the synthesis of polymer semiconductors PBTTT-C12 and PQT12. These can be used to create organic field-effect transistors (OFETs) with high charge mobilities.

We stock high purity (>98%) BT-C12-2Br as part of our range of monomers. Order online or request a quote today.

General Information


CAS Number 753470-95-0
Chemical Formula C32H52Br2S2
Full Name 5,5′-Dibromo-4,4′-didodecyl-2,2′-bithiophene
Molecular Weight 660.69 g/mol
Synonyms 2,2'-dibromo-3,3'-bis(n-dodecyl)-5,5'-bithiophene
Classification / Family Bithiophene, semiconductor synthesis intermediates, low band gap polymers, OFETs, organic photovoltaics, polymer solar cells

Chemical Structure


BT-C12-2Br chemical structure
Chemical structure of 5,5′-Dibromo-4,4′-didodecyl-2,2′-bithiophene (BT-C12-2Br), CAS 753470-95-0

Product Details


Purity >98% (1H NMR in CDCl3)
Melting Point 56 °C - 60 °C
Appearance Yellow flakey solid

MSDS Documentation


BT-C12-2Br MSDSBT-C12-2Br MSDS Sheet

Literature and Reviews


  1. High-Performance Semiconducting Polythiophenes for Organic Thin-Film Transistors, B. Ong et al., J. Am. Chem. Soc., 126, 11, 3378–3379 (2004); DOI: 10.1021/ja039772w.
  2. Factors Governing Intercalation of Fullerenes and Other Small Molecules Between the Side Chains of Semiconducting Polymers Used in Solar Cells, N. Miller et al., Adv. Energy. Mater., 2 (10), 1208-1217 (2012); DOI: 10.1002/aenm.201200392.
  3. Remarkable Suppression of Vibrational Relaxation in Organic Semiconducting Polymers by Introducing a Weak Electron Donor for Improved NIR-II Phototheranostics, C. Yin et al., Adv. Funct. Mater., 31 (47), 2106575 (2021); DOI: 10.1002/adfm.202106575.
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