Photophysical properties of phenylethyne-linked porphyrin and oxochorin dyads

A set of porphyrin-porphyrin and oxochlorin-oxochlorin dyads are prepared in which the constituent pigments are joined at the meso-proteins by the phenylethyne linker. The results shown and observed are useful in the design of multi pigment architectures that absorb in the red and undergo fast and efficient energy transfer, as required for light-harvesting applications.