Ring-opening metathesis polymerization of 18-e cobalt(I)-containing norbornene and application as heterogeneous macromolecular catalyst in atom transfer radical polymerization

In the last decades, metallopolymers have received great attention due to their various applications in the fields of materials and chemistry. In this article, a neutral 18-electron exo-substituted η⁴-cyclopentadiene CpCo(I) unit-containing polymer is prepared in a controlled/"living" fashion by combining facile click chemistry and ring-opening metathesis polymerization (ROMP). This Co(I)-containing polymer is further used as a heterogeneous macromolecular catalyst for atom transfer radical polymerization (ATRP) of methyl methacrylate and styrene. By combining facile click chemistry and ring-opening metathesis polymerization (ROMP), a neutral 18-electron exo-substituted η⁴-cyclopentadiene CpCo(I) unit-containing polymer is prepared in a controlled/"living" fashion. This Co(I)-containing polymer is further used as a heterogeneous macromolecular catalyst for atom transfer radical polymerization (ATRP) of methyl methacrylate and styrene.