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

Author(s)

Barros, Leonardo W. T. ; Cardoso, Thiago A. S. ; Bihlmeier, Angela ; Wagner, Danny ; Koelmel, Dominik K. ; Hoerner, Anna ; Braese, Stefan ; Cruz, Carlos H. Brito ; Padilha, Lazaro A.

• Document type: Journal article
• Source: Physical Chemistry Chemical Physics; v. 19, n. 32, p. 21683-21690, AUG 28 2017.
• Web of Science Citations: 7

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 pi-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. (AU)

• FAPESP's process: 13/16911-2 - Advanced spectroscopy of novel nanomaterials
• Grantee: Lázaro Aurélio Padilha Junior
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 14/06451-7 - Development of a photoluminescence system excited via linear and non-linear absortion and applications in semiconductor nanomaterials
• Grantee: Thiago Américo da Silva Cardoso
• Support Opportunities: Scholarships in Brazil - Scientific Initiation