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

Autor(es)

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.

• Tipo de documento: Artigo Científico
• Fonte: Physical Chemistry Chemical Physics; v. 19, n. 32, p. 21683-21690, AUG 28 2017.
• Citações Web of Science: 7

Resumo

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)

• Processo FAPESP: 13/16911-2 - Espectroscopia avançada em novos nanomateriais
• Beneficiário: Lázaro Aurélio Padilha Junior
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 14/06451-7 - Desenvolvimento de sistema de foto-luminescência excitada por absorção linear e não linear e sua aplicação em nanomateriais semicondutores
• Beneficiário: Thiago Américo da Silva Cardoso
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica