Helicity Induction and Two-Photon Absorbance Enhancement in Zinc(ll) Meso-Meso Linked Porphyrin Oligomers via Intermolecular Hydrogen Bonding Interactions

摘要

In nature,helical biopolymers such as DNA or alpha-helix of polypeptides play important roles in providing highly developed information that is crucial to living systems.Extensive efforts thus have been directed toward helicity induction in synthetic polymers for exploration of novel properties and functions that are difficult to attain without helicity.Porphyrin,known as a stable pigment with large absorbance and tunable electrochemical and optical properties,is a promising molecular backbone to form such helical polymers,although there are only a few reports on helical porphyrin arrays.