Coumarin-naphthalene conjugate for rapid optical detection of OCl^- and Y³⁺ in a cascade manner: combined experimental and theoretical studies.

ABSTRACT: The coumarin-naphthalene conjugate (A3), an ESIPT-active probe, selectively recognized OCl^- in a ratiometric manner in DMSO-water media. The recognition was associated with sky-blue emission (under UV light) as well as yellow emission (under visible light). The OCl^- assisted inhibition of the ESIPT process via H-bonding resulted in an intense emission at 484 nm (λ _ex = 365 nm). It allowed for the detection of OCl^- as low as 18.42 nM with a strong association constant, K = 1.08 × 10⁵ M^-1, around physiological pH. Furthermore, the A3-OCl^- adduct (Ad1) ratiometrically detected Y³⁺ via bright orange emission at 556 nm (λ _ex = 440 nm) under both UV and visible li

SUBMITTER: Shyam T 

PROVIDER: S-EPMC12017386 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature