Profile: Dyesol Limited specializes in providing titanium and aluminum pastes. We offer bipyridine- and terpyridine-based ligands for the synthesis of ruthenium-based dyes and general metallo-organic complexes. Bipyridine and terpyridine ligands are fundamental building blocks for the manufacture of ruthenium-based dyes. They are the binding ligands used to attach the dye to the titanium dioxide surface.