RT Journal Article T1 Indolenine-Based Derivatives as Customizable Two-Photon Fluorescent Probes for pH Bioimaging in Living Cells A1 Benítez-Martín, Carlos A1 Guadix-Domínguez, Juan Antonio A1 Pearson, John A1 Nájera-Albendín, Francisco A1 Pérez-Pomares, José María A1 Perez-Inestrosa, Ezequiel K1 Detectores de fotones AB Novel pH probes based on 2-(6-methoxynaphthalen-2-yl)-3,3-dimethyl3H-indole have been synthesized and characterized. These compounds display excellent“off−on” fluorescence responses to acidic pH especially under two-photon (TP) excitationconditions as well as strong selectivity and sensitivity toward H+. These features aresupported by fluorescence quantum yields over 35%, TP cross sections ∼60 GM, andgood resistance to photodegradation under acidic conditions. The synthetic versatility ofthis model allows subcellular targets to be tuned through minor scaffold modificationswithout affecting its optical characteristics. The effectiveness of the probes’ innatephotophysical properties and the structural modifications for different pH-relatedapplications are demonstrated in mouse embryonic fibroblast cells PB American Chemical Society YR 2020 FD 2020 LK https://hdl.handle.net/10630/36322 UL https://hdl.handle.net/10630/36322 LA eng NO Carlos Benitez-Martin, Juan A. Guadix, John R. Pearson, Francisco Najera, Jose M. Perez-Pomares, and Ezequiel Perez-Inestrosa ACS Sensors 2020 5 (4), 1068-1074 DOI: 10.1021/acssensors.9b02590 NO Spanish Ministerio de Ciencia, Innovación y UniversidadesConsejería de Salud, Junta de AndalucíaUniversidad de Málaga-Junta de AndalucíaFEDER funds DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 20 ene 2026