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.