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 B641-1g
Price £400 ex. VAT

Quality assured

Expert support

Volume discounts

Worldwide shipping

Fast and secure


DTS-EH-Sn, for the synthesis of low bandgap semiconducting polymers

High-quality monomer for applications in OLED, OPV and OFET devices


DTS-EH-Sn, namely 4,4'-Bis(2-ethylhexyl)-5,5'-bis(trimethyltin)-dithieno[3,2-b:2,3-d]silole, is the intermediate for the synthesis of low bandgap semiconducting polymers such as PSBTBT and PBBTSiD which are widely used in OLED, OPV and OFET devices.

Compared to C-C bond, C–Si bond has larger bond length which could result in improved π-π stacking of the molecules. The greater C-Si bond length also can reduce steric hindrance from the bulky alkyl side chains thereby to increase semi-crystallinity of the polymers containing dithienosilole (DTS) unit in their backbones.

General Information

CAS Number 1089687-06-8
Chemical Formula C30H54S2SiSn2
Molecular Weight 744.39 g/mol
Full Name 4,4'-Bis(2-ethylhexyl)-5,5'-bis(trimethyltin)-dithieno[3,2-b:2,3-d]silole
Synonyms DTS26-2Sn, 5,5′-bis(trimethylstannyl)-3,3′-bis(2-ethylhexyl)silylene-2,2′-bithiophene
Classification / Family Dithienosilole (DTS) derivatives, Organic semiconducting materials, Semiconductor Synthesis, Low band gap polymers, Organic Photovoltaics

Chemical Structure

1089687-06-8, DTS-EH-Sn, 4,4'-Bis(2-ethylhexyl)-5,5'-bis(trimethyltin)-dithieno[3,2-b:2,3-d]silole
Chemical structure of 4,4'-Bis(2-ethylhexyl)-5,5'-bis(trimethyltin)-dithieno[3,2-b:2,3-d]silole (DTS-EH-Sn), CAS No. 1089687-06-8

Product Details

Purity 97%
Boiling Point N/A
Appearance Yellowish to dark green liquid

MSDS Documentation

DTS-EH-Sn MSDS SheetDTS-EH-Sn MSDS sheet

Literature and Reviews

  1. Synthesis and Photovoltaic Properties of Dithieno[3,2-b:2',3'-d]silole-Based conjugated copolymer, S. Wena et al., J. Mater. Chem. A, 3, 13794-13800 (2015); doi: 10.1039/C5TA01523E.
  2. Surface Initiated Polymerization of A-A/B-B Type Conjugated Monomers by Palladium Catalyzed Stille Polycondensation: Towards Low Band-Gap Polymer Brushes, H. Awada et al., RSC Adv., 5, 78436-78440 (2015); doi: 10.1039/C5RA08027D.
  3. Fluorinated low band gap copolymer based on dithienosilole-benzothiadiazole for high-performance photovoltaic device, H. Lv et al., Polym. Chem., 5, 6279-6286 (2014); doi: 10.1039/C4PY00758A.
  4. Sub-ns triplet state formation by non-geminate recombination in PSBTBT:PC70BM and PCPDTBT:PC60BM organic solar cells, F. Etzold et al., Energy Environ. Sci., 8, 1511--1522 (2015); DOI: 10.1039/c4ee03630a.
  5. Synthesis and Characterization of Bridged Bithiophene-Based Conjugated Polymers for Photovoltaic Applications: Acceptor Strength and Ternary Blends, C-H. Chen et al., Macromolecules, 43, 697–708 (2010); DOI: 10.1021/ma902206u.
  6. Thionating Iso-diketopyrrolopyrrole-based Polymers: From P-type to Ambipolar Field Effect Transistors with Enhanced Charge Mobility, H. Zhang et al., Polym. Chem., 9, 1807-1814 (2018); doi: 10.1039/C8PY00292D.
Return to the top