A phenalenyl-based neutral stable π-conjugated polyradical

The first neutral π-conjugated polyradical based on phenalenyl with the spin unit inside the main chain was prepared. Cyclic voltammetry studies showed that this polyradical had excellent redox reversibility and enhanced π-delocalization between the neighboring spin units, in consistent with the UV–vis results. Initial magnetic studies showed that a strong antiferromagnetic interaction existed at solid state. The conductivity of the polyradical was measured with a value σRT ≈ 10−8 S/cm.