Synthesis and Characterization of Directly Linked Salen–Porphyrin System with Constrained Geometries

Abstract
Novel heterobinucleating porphyrin complexes, in which porphyrin and salen [N, N′-disalicylidene-ethylenediamine] subunits were directly linked with restricted geometries, were synthesized. These complexes showed a small change in their UV-vis spectra and oxidation potentials, but the fluorescence of porphyrin was effectively quenched by the linked nickel–salen subunit.