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oai:riuma.uma.es:10630/77702026-02-03T12:11:20Zcom_10630_2254col_10630_37959

00925njm 22002777a 4500 dc Collado-Martín, Daniel author Vida-Pol, Yolanda author Nájera-Albendín, Francisco author Pérez-de-Inestrosa-Villatoro, Ezequiel author 2014-07-03 BODIPY dyes are nowadays widely commercialized chromophores that have attracted immense interest as versatile tools in biological chemistry [1]. However, the generally very small Stokes shifts of BODIPY dyes may cause re-absorption or effects from excitation-light scattering, which is a potential drawback for their application, especially in bioimaging. One strategy to bypass this problem is the integration of BODIPY dyes as acceptors in bi- or multichromophoric arrays, some of them qualifying as energy transfer cassettes where donor and acceptor units are electronically non-conjugated [2]. In this communication we present a series of aminonaphthalimide–BODIPY energy transfer cassettes that shown very fast and efficient BODIPY fluorescence sensitization [3]. This was observed upon one- and two-photon excitation, which extends the application range of the investigated bichromophoric dyads in terms of accessible excitation wavelengths. In comparison with the direct excitation of the BODIPY chromophore, the two-photon absorption cross-section of the dyads is significantly incremented by the presence of the aminonaphthalimide donor.The applicability of the new probes in the one- and two-photon excitation mode was demonstrated both in solution and supported on silica nanoparticles, in a proof-of-principle approach in the fluorescence imaging of HeLa cells. http://hdl.handle.net/10630/7770 Transferencia de energia Fotoquímica Energy transfer in Aminonaphthalimide-BODIPY dyads upon one and two photons excitation