A Novel Ratiometric Fluorescent Probe for Ag + Based on Arginine-Naphthalene Imide
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JMEPEG https://doi.org/10.1007/s11665-020-05006-2
A Novel Ratiometric Fluorescent Probe for Ag+ Based on Arginine-Naphthalene Imide Jing Liu, Shan Wang, and Xiaofang Wang (Submitted April 25, 2020; in revised form June 10, 2020) A ratio fluorescent probe to detect Ag+ using arginine-naphthalene imide (AN) had been elaborately designed and synthesized. The structure of AN was characterized by 1HNMR and FTIR. The optical properties of AN were investigated by ultraviolet and fluorescence spectroscopy. The results indicated that the fluorescent intensity of AN was enhanced gradually with the increase of Ag+ concentration, which was hardly affected by other metal ions such as Bi3+, Cd2+, Co2+, Cr3+, Cu2+, Fe3+, Hg2+, Pb2+, K+ and Na+. A good linear correlation was displayed between the concentration of Ag+ (ranging from 4.30 to 11.40 lmol L21) and the fluorescence intensity (R2 = 0.9985). The detection limit was 0.1883 lmol L21. The mechanism of the sensor may be based on the principle of intramolecular charge transfer. It was expected that this novel ratio sensor could be used for the detection of silver ions in water. Keywords
Ag+, Arginine, fluorescence probe, naphthalimide, selective detection
1. Introduction Sliver ions have been widely used in daily life and industry due to its good extensibility, electrical conductivity and heat transfer properties (Ref 1). However, the mining, smelting, processing and commercial manufacturing activities of Ag ions had caused serious environmental pollution in recent decades. Excessive consumption of silver ions was a hazard to human health because they could accumulate and migrate under the biomagnification of the food chain. (Ref 2) Silver ions were needed to be accurately detected and properly handled. The traditional analyzing methods for sliver ions were limited due to high costly, complicated preparation process and poor accuracy (Ref 3). Therefore, the design of the novel sensors to detect silver ions counts a great deal for the environmental protection and human health. Quantum dots(QDs) have been intensely studied due to their unique optical properties as chemosensors (Ref 4-6). Numerous studies about the sensors have been reported in recent years. (Ref 7-9) ZnO QDs was designed and provided to tune the emission to the desired near infrared biological window through doping (Ref 10). Chen et al. reported that a cysteineCdS QDs sensor displayed a fine detection limit of 5.0 9 10 9 mol L 1. (Ref 11) R.D.K. Misra et al. synthesized ZnS and Cd doped nanorods in egg albumin matrix for drug carrier, and developed a new generation of effective drug carrier and imaging for cancer therapy (Ref 12). In addition, Lu et al. prepared a new kind of calixarene derivative PVC film electrode which could successfully apply to the analysis of Ag+. (Ref 13) Zhou et al. (Ref 14) synthesized a class of Schiff Jing Liu, Shan Wang, and Xiaofang Wang, College of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang 712000 Shaanxi, China. Contact e-mails: [email protected] and shanwan
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