Meso-β doubly linked and meso-meso, β-β, β-β triply linked oligoporphyrin molecular tapes as potential non linear optical (NLO) materials: quantum chemical calculations

The triply linked porphyrin tapes show much better enhancement of NLO properties than the doubly linked tapes. In all cases metallo porphyrin tapes show high hyperpolarizability than the free base porphyrin tapes. The triply linked oligoporphyrins are rigid and not susceptible for twists and turns which makes these compounds promising for a variety of applications. The study suggested that the prophyrin tapes show very large optical non linearities and hence may have potential applications in the development of non linear optical materials.