Metalated porphyrin-napthalimide based donor-acceptor systems with long-lived triplet states and effective three-photon absorption

Tunable near-infrared emission and three-photon absorption in lanthanide-doped double perovskite nanocrystals

“…Additionally, we found that our obtained values of NLO parameters are better compared with those of organic compounds, which are known for good NLO responses. 79,89–94 The values of the NLO parameters of DPNCs studied in this report are even one order higher than those of organic molecules.…”

Novel metallated imidazole phthalocyanines: synthesis, ultrafast excited-state carrier dynamics and multiphoton absorption properties

“…The value of n 2 for the sample varies as a result of the strong laser beam present in the system. 56 The nonlinear refractive index is related to the nonlinear on-axis phase shift 28 as follows:Δ Φ = kI 0 n 2 L eff ,where I 0 is the peak intensity of the incident laser beam, k = 2π/ λ is the wave vector, and L eff is the effective length of the sample. For all of our investigated Pc samples, valley-peak shapes were observed for the CA data as shown in Fig.…”

“…The value of the third-order nonlinear susceptibility (w (3) ) was calculated from the values of n 2 and b, where w (3) is a complex parameter: 57 w (3) = w R (3) + iw I (3) , in which the real part (w R (3) ) is related to n 2 and the imaginary part (w I (3) ) is associated with the 2PA coefficient b. 58 Using the equations 18,28 shown below, we calculated w (3) :…”

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

“…They have also conducted analysis of Z -scan open aperture data by solving three-level rate equations integrating the excited-state lifetime data, revealed by the target/global analysis of the fs-TA data set. Later, Ahmed et al considered a one free-base and three transition-metal porphyrin-napthalimide-based donor–acceptor system 53 to understand their photophysical response in interaction with fs lasers. Afterwards, in NLO studies, they estimated the nonlinear susceptibilities of these molecular systems to be 10 −14 e.s.u.…”