Immobilization of a Two-dimensional Porphyrin Assembly by Sol–Gel Polycondensation in the Gel Phase

A porphyrin which assembles into a two-dimensional sheet structure by the hydrogen-bonding interaction among the peripheral urea groups has been designed. Introduction of triethoxysilyl groups into the terminal groups has enabled us to immobilize this novel porphyrin-based cluster by sol–gel polycondensation.