Third-order, nonlinear optical interactions of some benzporphyrins

Rao, D. V. G. L. N.; Aranda, Francisco J.; Roach, Joseph F.; Remy, David E.

doi:10.1063/1.104323

Cited by 124 publications

(50 citation statements)

References 8 publications

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“…It is observed that the g values are enhanced by metal substitution. Our measured g value for TPP is comparable with those reported for tetrabenzoporphyrins [26]. It can be seen from Table 1 that the g values increase as we go from the completely filled d-shell in Zn to the partially filled d-shell in Cu and Ni.…”

Section: Resultssupporting

confidence: 90%

Effects of Metal Substitution on Third-order Optical Non-linearity of Porphyrin Macrocycle

Kandasamy

Shetty

Puntambekar

et al. 1999

J. Porphyrins Phthalocyanines

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The effects of axial ligands in Sn ( IV )-substituted 5,10,15,20-tetrakis [4-(carboethoxymethyleneoxy)phenyl]porphyrin and divalent transition metal substitution in 5,10,15,20-tetraphenylporphyrin on the second molecular hyperpolarizability (γ) at 802 nm were studied using the Z-scan technique. A significant increase in γ for divalent metal ions is observed with decreasing d-shell occupancy. In the case of the tetravalent metal-substituted porphyrin a dramatic enhancement of γ is seen when a strongly electronegative axial ligand such as I 2 is attached to the metal ion. A plausible explanation for the observed trend of γ has been sought in terms of metal-ligand interaction.

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Section: Resultssupporting

confidence: 90%

Effects of Metal Substitution on Third-order Optical Non-linearity of Porphyrin Macrocycle

Kandasamy

Shetty

Puntambekar

et al. 1999

J. Porphyrins Phthalocyanines

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“…In all cases, as shown in Figure 6, their response is fast and limited by the laser pulse autocorrelation profile, indicating that the dominant contribution to the observed nonlinearities are of electronic origin while any orientational contribution should be negligible. [37] Comparing the c (3) values of dyads 2 or 3 in toluene with that of the reference fullerene derivative 1, a clear enhancement of the second hyperpolarizability (ca. 1.5 10 À31 and 10 10 À31 esu for 2 and 3, respectively) is evident.…”

Section: Nlo Measurementsmentioning

confidence: 97%

Nonlinear Optical Properties of Ferrocene‐ and Porphyrin–[60]Fullerene Dyads

et al. 2007

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A series of novel [60]fullerene-ferrocene and [60]fullerene-porphyrin dyads, in which a fullerene and an electron donating moiety are attached through a flexible triethylene glycol linker are synthesized and their nonlinear optical (NLO) response studied. Specifically, the third-order susceptibility chi(3) of all fullerene derivatives are measured in toluene solutions by the optical Kerr effect (OKE) technique using 532 nm, 35 ps laser pulses and their second hyperpolarizability gamma are determined. All fullerene dyads studied exhibit enhancement of their NLO response compared to pristine fullerenes which has been attributed to the formation of a charge separated state. All experimentally measured hyperpolarizability gamma values are also calculated by the semiempirical methods AM1 and PM3. A good correlation is found between the theoretical and experimental values, suggesting that simple semiempirical methods can be employed for the designing and optimization of the fullerene-containing dyads displaying improved nonlinear responses.

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“…[18] An adequate model accounting for the variable transmission effect is the fourlevels system, [19] in which the absorption of an excited state is considered. [20] The scheme of the energy levels for a fourlevels system is presented in Figure 3. Absorption occurs for the transitions [1 Ǟ 3] and [2 Ǟ 4], with (hω 1,3 /2π) being equal to (hω 2,4 /2π), where ω i,j indicating the frequency of absorption for the transition [i Ǟ j] and h being the Planck constant.…”

Section: Introductionmentioning

confidence: 99%