From π-conjugated macrocycles to heterocycloarenes based on benzo[2,1-b:3,4-b′]dithiophene (BDTh): size- and geometry-dependent host–guest properties

Single bond linked macrocycles (MS-4T/MS-6T) and corresponding heterocycloarenes (MF-4T/MF-6T) were designed and synthesized, which show size- and geometry-dependent host–guest properties.