Abstract: Copolymerization of molecular assemblies into organic hosts is an effective way to fabricate new materials having desirable properties. The assembly of the molecular species prior to polymerization is advantageous because of the greater control of the structure and amount of species incorporated into the polymer and the possibility of regulating their microenvironments. We are using copolymerization techniques to design network polymers that can stabilize metal-small molecule adducts that can not be isolated at room temperature in solution. As part of the stabilizing process, the polymer matrix needs to minimise the intermolecular interactions between immobilized complexes in order to prevent undesirable chemistry. In this talk we discuss our findings on the monodispersal of metal complexes in network polymers and their ability to stabilize carbon monoxide, dioxygen and nitric oxide adducts