A series of heptamethine–oxonol dyes featuring different heterocyclic end groups were designed with the aim to explore structure–property relationships in π-extended coupled polymethines.

We report the synthesis of a new family of chromophores based on benzothiazole, indandione, and tricyanofuran moieties, forming aromatic neutral precursors or negatively charged quinoidal counterparts.

Efficient synthesis of a [¹⁸F]F-C-glycosyl dual imaging probe displaying a cyanine for fluorescence imaging (FLI) and a robust [¹⁸F]F–C bond for positron emission tomography (PET) imaging.