A 2-Hydroxy-1-naphthaldehyde Schiff Base for Turn‐on Fluorescence Detection of Zn2+ Based on PET Mechanism

Abstract

Zinc ion is closely related to human health. Its content in human body is small, while the effect is large. However, it is not the more the better, must be in a scienti c balance. Therefore, it is signi cant to the rapid detection of Zn 2+ in the environment and organism. Herein, a uorescent probe based on 2-hydroxy-1-naphthalene formaldehyde and furan-2-carbohydrazide was conveniently synthesized via Schiff base reaction. And this probe has been successfully applied to the accurate and quantitative detection of Zn 2+ in real samples, showing turn on uorescence, good selectivity, very low detection limit, real time response and reusability. In addition, this probe has the potential application to trace Zn 2+ in living cells with low cytotoxicity.

Preparation of Large Conjugated Polybenzimidazole Fluorescent Materials and Their Application in Metal Ion Detection

“…It can be found that the ∆E is greatly reduced when CPBI 2 is complexed with Cu 2+ (Figure 8). This indicates that a stable metal complex has been formed, which is further proof of coordination between metal ions and polymers [70,71]. molecular orbital (HOMO) is mainly distributed on the side containing NH2 at the end of the polymer.…”

Recent Developments in the Detection of Zn2+ Ions Using Schiff Base Probes

“…The emission intensity increased from 423 nm to 545 nm, and the limit of detection was found to be 5.5 M. A turn-on fluorescence Schiff base probe 12 (Figure 4) based on 2-hydroxy-1-naphthylaldehyde was developed for the recognition of Zn 2+ ions in real water samples by Mu et al 58 The probe was analyzed by absorption spectroscopy and showed three absorption bands at 262, 325, and 362 nm. A gradual decrease in the absorbance band was observed with the addition of Zn 2+ in the solution.…”

“…Developed a turn-on fluorescence Schiff base probe 12 (Figure 4) based on 2-hydroxy-1naphthylaldehyde for the recognition of Zn 2+ ions in the real water samples by Mu et al [58] The probe was detected with the help of absorption spectroscopy. This probe shows three absorption bands at 262, 325 and 362 nm, respectively.…”

Fluorescent Schiff base sensors as a versatile tool for metal ion detection: strategies, mechanistic insights, and applications

“…3.1.9 Zn 2+ sensor [240][241][242][243][244] . Zinc is an essential trace element, involved in several important functions in the human body such as metabolism of RNA and DNA, cell apoptosis, reproduction, immune system function, protein metabolism, etc.…”