Synthesis and Application of Pyrene-Based Fluorescent Probe for the Continuous Detection of Cu and Picric Acid.

A novel pyrene-based fluorescent probe PYS was designed and synthesized for the sequential detection of Cu and picric acid (PA) under identical experimental conditions. In ethanol-HEPES buffer (V/V = 8:2, pH = 7.4), Cu was selectively detected by PYS through fluorescence enhancement with a binding constant of 7.

Synthesis and Applications of a Novel Naphthalimide-Based Fluorescent Probe for Relay Recognition of Cu and Cysteine.

Developing multifunctional probes capable of detecting two or more analytes under same test conditions is important for improving assay efficiency, simplifying experimental procedures, and providing more comprehensive analytical results in complex systems. This study employed 1,8-naphthalimide as a fluorescent group to design and synthesizes a naphthalimide-based Schiff base fluorescent probe, ANQ. In a CHCN/HEPES buffer solution with a volume ratio of 3:7, ANQ enabled the continuous and rapid detection of Cu and cysteine under the same detection conditions.

Synthesis and Application of 1,8-Naphthalimide Derivatives Fluorescent Probe for Sequential Recognition of Cu and HPO.

A naphthalimide Schiff base fluorescent probe (BSS) was designed and synthesized from 4-bromo-1,8-naphthalic anhydride, and its structure was characterized by HNMR, CNMR, FTIR, and MS. Fluorescence emission spectra showed that probe BSS could realize the "turn-off" detection of Cu in acetonitrile solution, detection process with strong specificity and excellent anti-interference of other metal ions. In the fluorescence titration experiments, fluorescence intensity of BSS showed a good linear relationship with the Cu concentration (0-10 µmol/L), and the detection limit was up to 7.

Synthesis of Coumarinylhydrazone Fluorescent Probe and its Relay Recognition of Cu and HPO.

A novel coumarinylhydrazone fluorescent probe L was designed and synthesized from 4-(diethylamino)salicylaldehyde, its structure was characterized by NMR, IR. Fluorescence emission spectra showed that in ethanol solution, probe L could form a 1:1 complex L-Cu with Cu to realize the "turn-off" detection of Cu with high specificity and sensitivity (3.7 × 10 mol/L).