Third order NLO and second hyperpolarizability of functional porphyrin based polyimides

Ethyl acetoacetate and acetylacetone appended hexabromo porphyrins: synthesis, spectral, electrochemical, and femtosecond third-order nonlinear optical studies

“…They were also successful in modulating the NLO response by structural modifications. 57 Nadafan et al reported NLO responses of meso -substituted porphyrin derivatives, revealing their results that some symmetric porphyrins can have higher nonlinearity responses than some asymmetric porphyrins. 58 Vinogradov et al studied platinum( ii )-based β-tetrabenzoporphyrin derivatives for 3PA in the near-infrared region (1200–2000 nm) using the Z -scan technique, and depicted two-photon absorption cross-sections varying from 790 GM to 1690 GM.…”

A comparative study on nonlinear optical properties of zinc porphyrins analogs: Coordination atoms and group effects

“…In general, organic compounds with electron-donating and electron-accepting substituents, linked either directly or through a π-conjugated bridge, exhibit strong NLO responses [4][5][6][7]. Among these compounds, porphyrins and their derivatives, with cyclic π-conjugated systems, could be promising candidates for NLO applications [8][9][10][11][12][13]. The basic skeleton of the porphyrin macrocycle is comprised of four pyrrole units connected by four methine carbons.…”