Three-photon absorption in anthracene-porphyrin-anthracene triads: A quantum-chemical studyReportar como inadecuado


Three-photon absorption in anthracene-porphyrin-anthracene triads: A quantum-chemical study


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We have applied correlated quantum-chemical methods to investigate the three-photon absorption 3PA response of a porphyrin triad derivative, where the central macrocycle is linked in mesopositions to two anthracene units via acetylenic bridges. The 3PA frequency-dependent spectrum of this derivative is dominated by a single resonance feature in the transparent region, associated with charge-transfer states between porphyrin and anthracene. The calculations indicate a two order of magnitude enhancement in the 3PA cross section in the triad molecule with respect to the individual entities, which is attributed to close one-, two-, and three-photon resonances together with strong electronic couplings among the units.



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Autor: Zhu, Lingyun - Yang, Xia - Yi, Yuanping - Xuan, Pengfei - Shuai, Zhigang - Chen, Dezhan - Zojer, Egbert - Brédas, Jean-Luc - Bel

Fuente: https://smartech.gatech.edu/



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