Polymerization or copolymerization of PAMs was performed via ATRP with PDI-tetraBr as the initiator. In a typical procedure, PDI-tetraBr (1.0 eq.), copper(I) bromide (CuBr, 1.5 eq.), dNbpy (1.5 eq.) and the PAMs in solid form were loaded in a dry Schlenk flask. The Schlenk flask was evacuated and refilled with argon several times to remove oxygen.