Supramolecular benzoxazines : a novel type of polymeric chain based on hydrogen bonding and metallo-supramolecular system

Abstract

A novel type of benzoxazine supramolecule, i.e, hydrogen bond network- supramolecule and metallo-supramolecule, is proposed. Diamine-linked benzoxazine dimers prepared by the ring opening reaction of diamine-based benzoxazine monomers are good models for supramolecular assembly via hydrogen bonding and copper metal ion complexation the molecular assembly induces supramolecular polymer chains as evidenced from the viscosity and number of the end group analyzed by viscosity and ¹H NMR techniques. The chain length of diamine is a key factor to form supramolecular polymer via hydrogen bond network and/or metal complexation. The morphology of supramolecular system received is unique to be in forms of donut-like, vesicle-like, sphere-like, needle-like, or comb-like depending on the type of diamine and the concentration of benzoxazine dimers.