Fig. 1: Polymerization and results.
From: All-organic polymeric materials with high refractive index and excellent transparency

a DBU-catalyzed polymerization of bromoalkynes 1a-1d (blue part) and dithiophenols 2a and 2b (orange part)under nitrogen in DMSO at 80 °C for 4 h ([1]/[2] = 1:1, [1] = 0.2 M, [DBU]/[1] = 1). b Chemical structures and polymerization results of P1–P5. Mw and PDI (Mw/Mn) of polymers were estimated by GPC in THF on the basis of a polymethyl methacrylate (PMMA) calibration.