ArticleJournal of fluorescence2026
Design and Photophysical Investigation of a Regioisomeric Bis[2-(2'-hydroxyphenyl)benzoxazole] Derivative for Sensing Applications.
Article in Journal of fluorescence, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The development of fluorescent probes with large Stokes' shifts and high sensitivity remains a critical objective in chemical sensing and bioimaging. In this study, we report the design, synthesis, and comprehensive photophysical characterization of a novel regioisomeric bis(2-(2'-hydroxyphenyl)benzoxazole) scaffold, bis(HBO) 3, expanding the limited family of ESIPT-enabled bis(HBO) systems. This newly developed probe integrates two HBO units within a distinct C2'-symmetric framework, enabling systematic investigation of regio-effects on excited-state intramolecular proton transfer (ESIPT) behavior and analyte responsiveness. Photophysical studies reveal that bis(HBO) 3 exhibits characteristic ESIPT-driven emission with a large Stokes' shift (Δλ ≈ 160-180 nm) and solvent-independent fluorescence centered around λ
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