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In this review article, we have described various strategies to increase the efficiency of two-photon absorption process of porphyrin related molecular systems. While 18-π electronic aromatic porphyrin monomers exhibit relatively small two-photon absorption cross-section values, the perturbation of electronic nature of porphyrins by substituting electron donating–accepting moieties, π-conjugated peripheral...
Synthesis, structural characteristics, and optical and electrochemical properties of various covalently-linked porphyrin arrays are described. First, aromatic-spacer bridged diporphyrins were prepared in which the diporphyrin geometries were conformationally-restricted and thus suitable for detailed studies on the exciton coupling and the intramolecular energy and/or electron transfer reactions. Secondly,...
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