In this work we present an investigation of the non-linear optical (NLO) properties of two octupolar chromophores: [Zn(4,4′-bis(dibutylaminostyryl) -[2,2′]-bipyridine)3]2+ and [Zn(4,4′-bis((E)- 2-(N-(TEG)pyrrol-2-yl)vinyl)-[2,2′]-bipyridine)3]2+ with Zn(II) as the coordination center, using two-photon emission technique (TPE) in fs-pulse temporal regime. Compared to the free ligands, our results do not show a net increase in the two-photon absorption (TPA) cross-section for the octupolar complexes, once normalized to the ligand unit. This is in partial disagreement with a previous theoretical study investigating the first molecule where a significant increase of the TPA cross-section was predicted (X. J. Liu, et al., J. Chem. Phys., 2004, 120, 11 493).
Two-photon absorption of Zn(II) octupolar molecules / S. Mazzucato, I. Fortunati, S. Scolaro, M. Zerbetto, C. Ferrante, R. Signorini, D. Pedron, R. Bozio, D. Locatelli, S. Righetto, D. Roberto, R. Ugo, A. Abbotto, G. Archetti, L. Beverina, S. Ghezzi. - In: PHYSICAL CHEMISTRY CHEMICAL PHYSICS. - ISSN 1463-9076. - 9:23(2007), pp. 2999-3005. [10.1039/b618709a]
Two-photon absorption of Zn(II) octupolar molecules
D. Locatelli;S. Righetto;D. Roberto;R. Ugo;
2007
Abstract
In this work we present an investigation of the non-linear optical (NLO) properties of two octupolar chromophores: [Zn(4,4′-bis(dibutylaminostyryl) -[2,2′]-bipyridine)3]2+ and [Zn(4,4′-bis((E)- 2-(N-(TEG)pyrrol-2-yl)vinyl)-[2,2′]-bipyridine)3]2+ with Zn(II) as the coordination center, using two-photon emission technique (TPE) in fs-pulse temporal regime. Compared to the free ligands, our results do not show a net increase in the two-photon absorption (TPA) cross-section for the octupolar complexes, once normalized to the ligand unit. This is in partial disagreement with a previous theoretical study investigating the first molecule where a significant increase of the TPA cross-section was predicted (X. J. Liu, et al., J. Chem. Phys., 2004, 120, 11 493).
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