Campos González, RenéVázquez Domínguez, PabloRemón Ruiz, PatriciaNájera, FranciscoCollado, DanielPérez Inestrosa, EzequielBoscá Mayans, FranciscoRos, AbelPischel, Uwe2023-02-172023-02-172022Campos-González, R., Vázquez-Domínguez, P., Remón, P., Nájera, F., Collado, D., Pérez-Inestrosa, E., Boscá, F., Ros, A., & Pischel, U. (2022). Bis-borylated arylisoquinoline-derived dyes with a central aromatic core: towards efficient fluorescent singlet-oxygen photosensitizers. In Organic Chemistry Frontiers (Vol. 9, Issue 16, pp. 4250–4259). Royal Society of Chemistry (RSC). https://doi.org/10.1039/d2qo00778a2052-4129https://hdl.handle.net/10272/21612Conveniently modified polycyclic aromatic hydrocarbon (PAH) fluorophores are obtained by a bromination–borylation sequence. The bis-borylated dyes show red-shifted absorption (λabs,max > 450 nm) and emission (λf,max > 500 nm; Φf: 0.3–0.5) properties as compared to the parent PAHs. Their centrosymmetric A–π-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 (ΦΔ: 0.50–0.66). This bipartition provides the setting for the concomitant observation of fluorescence and photosensitization, making these dyes ideal bimodal chromophores.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/journal articleopen access23 Química