%0 Journal Article
%A Campos-Gonzalez, Rene
%A Vazquez-Dominguez, Pablo
%A Remon, Patricia
%A Najera, Francisco
%A Collado, Daniel
%A Perez-Inestrosa, Ezequiel
%A Bosca, Francisco
%A Ros, Abel
%A Pischel, Uwe
%T Bis-borylated arylisoquinoline-derived dyes with a central aromatic core: towards efficient fluorescent singlet-oxygen photosensitizers
%D 2022
%@ 2052-4129
%U http://hdl.handle.net/10668/19649
%X Conveniently modified polycyclic aromatic hydrocarbon (PAH) fluorophores are obtained by a bromination-borylation sequence. The bis-borylated dyes show red-shifted absorption (lambda(abs,max) > 450 nm) and emission (lambda(f,max) > 500 nm; phi(f): 0.3-0.5) properties as compared to the parent PAHs. Their centrosymmetric A-pi-A (A: acceptor) structures led to the observation of two-photon absorption (up to 60 GM) in the near-infrared spectral region (>800 nm). The rigid structure shuts down non-radiative deactivation by limiting rotational or vibrational freedom. Thus, the excited-state pathways originating from the excited singlet state are resumed to fluorescence and excited triplet-state formation. The latter is involved in the energy-transfer sensitization of singlet oxygen (phi(Delta): 0.50-0.66). This bipartition provides the setting for the concomitant observation of fluorescence and photosensitization, making these dyes ideal bimodal chromophores.
%K 2-photon absorption
%K Bodipy dyes
%K Pi-a
%K Optoelectronic properties
%K Highly fluorescent
%K Optical-properties
%K Trivalent boron
%K Acceptor
%K Donor
%K Fluorophores
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