2.1. Materials

All reagents, chemical compounds, and solvents were purchased from Sigma-Aldrich (Milwaukee, WI, USA), Merck (Darmstadt, Germany), and AK Scientific, Inc. (San Francisco) and used without any further purification. NBS was recrystallized twice from hot water, and THF was distilled from sodium/benzophenone ketyl under reduced pressure before use. The polymerization solvents were degassed and stored over activated 3 A° molecular sieves under an inert atmosphere, while the other solvents were ACS grade. 4,7-Dibromobenzo[c]-1,2,5-thiadiazole (BTBr) and 2,1,3-benzothiadiazole-4,7-bis(boronic acid pinacol ester) (BTBOR) were purchased from Sigma-Aldrich and used with no further purification. 4,7-Di(2-thienyl)-2,1,3-benzothiadiazole (BTDT) was prepared according to a procedure reported in the literature [31]. Synthesis of EHON derivatives are given in electronic supplementary information (ESI).