Abstract
A chemosensor (CNS) built on a naphthalene fluorophore was developed, featuring a disulfide-bridged dimer structure. The probe CNS was completely characterized by the usual spectral analysis methods like 1H NMR, 13C NMR, and HR-MS. The CNS probe selectively detects Cu2+ ions and subsequently recognizes the amino acid tryptophan in a semi-aqueous medium of DMF:H2O solution. The detection of Cu2+ ions occur via three distinct mechanisms: suppression of the photoinduced electron-transfer process (PET), arrested rotation of diuryl groups leading to conformational change, and a blue-shifted fluorescence enhancement through intramolecular charge-transfer (ICT). With a 1:1 complexation ratio and a detection limit of 2.14 x 10-4 M, the CNS probe has been successfully applied in various practical scenarios, including real water sample analysis, glyphosate detection, smartphone-based color detection, and Cu2+ ion testing using a cotton-swab method.
Published Version
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