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.

4,4'-Dimethyl-2,2'-bipyridyl

CAS Number 1134-35-6

Chemistry Building Blocks, Heterocyclic Building Blocks, Materials, Monomers


Product Code B1491-10g
Price $90 ex. VAT

A well-known bipyridyl ligand with two methyl groups

Readily available for the synthesis of organometallic photosensitizer dyes in development of dye-sensitized solar cells (DSSCs)


Specifications | MSDS | Literature and Reviews


4,4'-Dimethyl-2,2'-bipyridyl (CAS number 1134-35-6), derived from bipyridine and also bearing electron rich methyl functional groups at 4,4'-positions, is typically used as a starting material for the sensitizers synthesis in dye sensitized solar cells (DSSCs).

Bipyridine ligand is a strong chelating ligand for metal centres in coordinative compounds. The organometallic compound of 4,4'-dimethyl-2,2'-bipyridyl increases the bridging ligand lengths resulting a greater electron-hole separation effect in DSSCs, hence reduce charge recombination to improve the overall device efficiency. High device efficiencies engaging 4,4'-dimethyl-2,2'-bipyridyl coordinative dyes are attributed to efficient light harvesting of these novel dyes and the improved charge transfer dynamics at TiO2–dye and dye–hole transport interfaces.

4,4'-Dimethyl-2,2'-bipyridyl is also used for fabricating electrochemiluminescence (ECL) materials. It enhances the ECL intensity owing to the donor ability as a α-diimine ligands.

General Information


CAS Number 1134-35-6
Chemical Formula C12H12N2
Full Name 4,4'-Dimethyl-2,2'-bipyridyl
Molecular Weight 184.24 g/mol
Synonyms 2,2′-Bi(γ-picoline), 4,4′-Dimethyl-2,2′-bipyridine
Classification / Family Bipyridyl derivatives, Semiconductor synthesis intermediates, Heterocyclic building blocks, Dye-sensitized solar cells (DSSCs)

Chemical Structure


4,4'-Dimethyl-2,2'-bipyridyl, CAS 1134-35-6
4,4'-Dimethyl-2,2'-bipyridyl chemical structure, CAS 1134-35-6

Product Details


Purity >98% (1H NMR)
Melting Point Tm = 169 - 174 °C
Appearance Pale pink powder

MSDS Documentation


4,4'-Dimethyl-2,2'-bipyridyl4,4'-Dimethyl-2,2'-bipyridyl MSDS Sheet

Literature and Reviews


  1. Accessing the charge separation effects in dye-sensitized solar cells based on a vectorial planning of supramolecular ruthenium dye, A. Parussulo et al., Inorganica Chim. Acta, 453, 764-770 (2016); DOI: 10.1016/j.ica.2016.09.039.
  2. Artificial photosynthesis based on dye-sensitized nanocrystalline TiO2 solar cells, J.-J. Lagref et al., Inorganica Chim. Acta, 361(3), 735-745(2008); DOI: 10.1016/j.ica.2007.05.061.
  3. Molecular engineering on semiconductor surfaces: design, synthesis and application of new efficient amphiphilic ruthenium photosensitizers for nanocrystalline TiO2 solar cells, J.-J Lagref et al., Synth. Met., 138(1-2), 333-339(2003); DOI: 10.1016/S0379-6779(03)00034-1.
Return to the top