These observations indicate that the variations of the g-factor are not related to the increased structural mobility of the heated network, but rather to the delocalization of unpaired electrons. The g-factor of both polymers increases upon heating, and it increases further upon cooling for SNP-NDT1. Here, both polymers are switched to a "more localized" spin state. However, SP-BTT is better at delocalizing radical paramagnetic centers along the polymeric chain in comparison to SNP-NDT1 (Figure ).