Development of 4,4′-bibenzo[c]thiophene fluorophores with substituents on the thiophene rings

We provide a facile synthetic method of 1,1′-disubstituted 4,4′-bibenzo[ c ]thiophene fluorescent dyes from 1,1′,3,3′-tetrahydro-[4,4′-bibenzo[ c ]thiophene] 2,2′-dioxide.