Nonlinear Absorption by Porphyrin Supramolecules

Ogawa, K.; Kobuke, Yoshiaki

doi:10.5772/35642

Cited by 2 publications

(2 citation statements)

References 39 publications

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“…Finally, the herein reported NLA coefficients when compared to other values found for organic compounds [11] are much larger. Furthermore the effective 2PA cross section values measured in the commercial Pphs are of the same order of magnitude than those reported for porphyrin supramolecules [12].…”

Section: Discussionsupporting

confidence: 69%

Nonlinear optical characterization of tetraphenylporphyrin in the picosecond regime

Cassagne

Chniti

Araújo

et al. 2015

2015 17th International Conference on Transparent Optical Networks (ICTON)

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Applying the D4σ-Z-scan technique with a laser delivering single pulses in the picosecond regime at 1064 nm, 532 nm, and 355 nm we report on the nonlinear (NL) optical properties of 5,10,15,20-Tetraphenyl-21H,23Hporphine (TPP) and 5,10,15,20-Tetraphenyl-21H,23H-porphine zinc (ZnTPP) solutions prepared in chlorobenzene. Accurate measurements of the NL coefficients for 4 concentrations in both compounds are provided. The results show no response in the IR for both materials, negative NL refraction for TPP in the green changing sign to positive for ZnTPP and positive NL refraction in the UV for both compositions. The NL absorption of these materials is quite huge in the visible range where applications for optical limiting are needed.

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Section: Discussionsupporting

confidence: 69%

Nonlinear optical characterization of tetraphenylporphyrin in the picosecond regime

Cassagne

Chniti

Araújo

et al. 2015

2015 17th International Conference on Transparent Optical Networks (ICTON)

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“…The development of organic materials displaying high twophoton absorption (2PA) has recently attracted great interest due to variousp otential applications [1,2] in photonics and optoelectronics, such as three-dimensional optical datas torage, [3,4] multiphoton microfabrication, [5][6][7] fluorescence imaging, [8,9] photodynamic therapy, [10,11] and opticalp owerl imiting, [12] among others. Chromophores with strong 2PAa re desired for all these applicationsf or the remarkable advantages of the two-photon over the commono ne-photon excitation (the former allowing ab etter focalisation)a nd of employing the less energetic andm ore penetrating infrared radiation with respect to the common ultraviolet-visible light.…”

Section: Introductionmentioning

confidence: 99%

Efficient Excited‐State Symmetry Breaking in a Cationic Quadrupolar System Bearing Diphenylamino Donors

et al. 2015

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We report a joint experimental and theoretical investigation of a quadrupolar D-π-A(+) -π-D system, the electron donors being diphenylamino groups and the electron acceptor being a methylpyridinium, in comparison with the dipolar D-π-A(+) system. The emission spectra of the two compounds overlap in all the investigated solvents. This finding could be rationalized by TD-DFT calculations: the LUMO-HOMO molecular orbitals involved in the emission transition are localized on the same branch of the quadrupolar structure that becomes the fluorescent portion, corresponding to that of the single-arm compound. Excited-state symmetry breaking has been rarely observed for quadrupolar systems showing negative solvatochromism and is here surprisingly revealed, even in low polarity solvents. Femtosecond transient absorption measurements revealed that an efficient photoinduced intramolecular charge transfer takes place in the quadrupolar chromophore, more efficient than in its dipolar analogue. This result is promising in view of the application of these compounds as novel two-photon absorbing materials.

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Nonlinear Absorption by Porphyrin Supramolecules

Cited by 2 publications

References 39 publications

Nonlinear optical characterization of tetraphenylporphyrin in the picosecond regime

Nonlinear optical characterization of tetraphenylporphyrin in the picosecond regime

Efficient Excited‐State Symmetry Breaking in a Cationic Quadrupolar System Bearing Diphenylamino Donors

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