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Issue 32, 2017
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Two-photon absorption in a series of 2,6-disubstituted BODIPY dyes

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Abstract

We report on the two-photon absorption spectra of a series of 2,6-disubstituted BODIPY dyes. Depending on the substituents, we observe increasing two-photon absorption cross sections with values up to 350 GM compared to 70 GM in the unsubstituted dye. Quantum chemical calculations are performed to assign the absorption bands and to understand the factors controlling the size of the two-photon absorption cross section. Both the maximum of the two-photon absorption band as well as the red-shift of the whole spectrum correlate with the ability of the substituents to extend the π-electron system of the dye. The above-mentioned intense two-photon absorption band corresponds to the absorption of photons with 1.3 eV, which is at the first near-infrared transparency window for biological tissues. The dyes could thus be suitable for bio-imaging applications.

Graphical abstract: Two-photon absorption in a series of 2,6-disubstituted BODIPY dyes

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Publication details

The article was received on 16 Nov 2016, accepted on 17 Jul 2017 and first published on 20 Jul 2017


Article type: Paper
DOI: 10.1039/C6CP07849D
Citation: Phys. Chem. Chem. Phys., 2017,19, 21683-21690
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    Two-photon absorption in a series of 2,6-disubstituted BODIPY dyes

    L. W. T. Barros, T. A. S. Cardoso, A. Bihlmeier, D. Wagner, D. K. Kölmel, A. Hörner, S. Bräse, C. H. Brito Cruz and L. A. Padilha, Phys. Chem. Chem. Phys., 2017, 19, 21683
    DOI: 10.1039/C6CP07849D

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