Donor–π–acceptor–π–donor ferrocenyl benzothiadiazoles: synthesis, structure, and properties

A series of donor–π–acceptor–π–donor type of ferrocenyl substituted benzothiadiazoles were designed, and synthesized by the Pd-catalyzed Sonogashira coupling reaction. The electrochemical, photophysical, thermal, and structural properties of ferrocenyl substituted benzothiadiazoles are discussed. These properties show strong donor–acceptor interaction.