The synthesis and radical ring‐opening polymerization of an adamantane‐substituted bifunctional vinylcyclopropane monomer is described. The radical polymerization using AIBN as a radical initiator proceeded smoothly at 60 °C along with a large volume expansion (+6.1%) to afford the corresponding networked polymer. The structural analysis with the solid‐state 13C NMR clearly revealed that radical polymerization occurred predominantly by a 1,5 ring‐opened reaction. Furthermore, copolymerization of bifunctional methacrylate monomer with the vinylcyclopropane monomer provided controlled volume shrinkage by varying the feeding ratio.

Photoinduced electron-transfer processes between phthalocyanines ( H2Pc and ZnPc ) as electron donors and perylene derivatives as electron acceptors have been studied using a time-resolved, nanosecond transient absorption method in benzonitrile. The observed findings show that intermolecular electron transfer takes place via the excited triplet states of ZnPc and H2Pc , as confirmed by the characteristic transient absorption bands in the near-IR region. The visible light excitation of the mixtures of H2Pc and the perylene derivatives adsorbed onto TiO2gave a relatively high photovoltaic efficiency.