scholarly journals Hydrogen-Bonded Colorimetric and Fluorescence Chemosensor for Fluoride Anion With High Selectivity and Sensitivity: A Review

2021 ◽  
Vol 9 ◽  
Author(s):  
Zhifeng Deng ◽  
Cheng Wang ◽  
Haichang Zhang ◽  
Taotao Ai ◽  
Kaichang Kou
Keyword(s):  
High Sensitivity ◽  
Fluoride Anion ◽  
Potential Hazard ◽  
Eye Detection ◽  
Extraction Ability ◽  
Hydrogen Bond Interaction ◽  
Naked Eye ◽  
Surrounding Environment ◽  
Sensitivity And Selectivity ◽  
Naked Eye Detection

In recent years, the wide application of fluoride materials has grown rapidly, therefore excessive discharge in the surrounding environment, especially in drinking water and organic effluent, has become a potential hazard to humans, and has even resulted in fluorosis disease. The development of a highly effective and convenient method to recognize fluoride anions in surrounding environments seems necessary and urgent. Among which, the development of a colorimetric and fluorescence fluoride chemosensor with obvious color changing allowing for naked-eye detection with high sensitivity and selectivity is more interesting and challenging. In this minireview, current novel colorimetric and fluorescence chemosensors for fluoride anions by hydrogen-bond interaction are introduced, including obvious color changing by naked-eye detection, high sensitivity and selectivity, non-pollution and fluoride extraction ability, aqueous detection, and other additional functions. Finally, the perspective of the fluoride chemosensor design concept and potential evolution trends are pointed out.

Non-enzymatic colorimetric sensor strip based on melamine-functionalized gold nanoparticles assembled on polyamide nanofiber membranes for the detection of metronidazole

2019 ◽  
Vol 11 (29) ◽  
pp. 3706-3713 ◽  
Author(s):  
Mohammed Awad Abedalwafa ◽  
Yan Li ◽  
Chunfang Ni ◽  
Gang Yang ◽  
Lu Wang
Keyword(s):  
Gold Nanoparticles ◽  
Color Change ◽  
High Sensitivity ◽  
Colorimetric Sensor ◽  
Eye Detection ◽  
Naked Eye ◽  
Functionalized Gold Nanoparticles ◽  
Sensitivity And Selectivity ◽  
Nanofiber Membranes ◽  
Naked Eye Detection

Non-enzymatic colorimetric sensor strip for detection of metronidazole (MTZ) was designed and constructed, with high sensitivity and selectivity. Which can be used for naked-eye detection of MTZ with a visible color change from pink to purple.

A T-shaped triazatruxene probe for the naked-eye detection of HCl gas with high sensitivity and selectivity

2016 ◽  
Vol 52 (13) ◽  
pp. 2748-2751 ◽  
Author(s):  
Xiang-Chun Li ◽  
Chun-Yu Wang ◽  
Yi Wan ◽  
Wen-Yong Lai ◽  
Li Zhao ◽  
...  
Keyword(s):  
Schiff Base ◽  
High Sensitivity ◽  
Eye Detection ◽  
Naked Eye ◽  
Sensitivity And Selectivity ◽  
Hcl Gas ◽  
Naked Eye Detection

A T-shaped Schiff-base triazatruxene derivative (TATNFF) was designed, synthesized, and explored as a sensitive probe to detect HCl gas by the naked eye.

Two Rhodamine-based Turn on Chemosensors with High Sensitivity, Selectivity, and Naked-Eye Detection for Hg2+

2017 ◽  
Vol 30 (2) ◽  
pp. 225-230 ◽  
Author(s):  
Yan Zhou ◽  
Li-qiang Yan ◽  
Zhi-neng Kong ◽  
Wen-qi Du ◽  
Bao-ying Wu ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Eye Detection ◽  
Naked Eye ◽  
Turn On ◽  
Naked Eye Detection

scholarly journals A Gold Growth-Based Plasmonic ELISA for the Sensitive Detection of Fumonisin B1 in Maize

Toxins ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 323 ◽  
Author(s):  
Shengnan Zhan ◽  
Lingyan Zheng ◽  
Yaofeng Zhou ◽  
Kesheng Wu ◽  
Hong Duan ◽  
...  
Keyword(s):  
Horseradish Peroxidase ◽  
Color Change ◽  
Fumonisin B1 ◽  
High Sensitivity ◽  
Enzyme Linked Immunosorbent Assay ◽  
Eye Detection ◽  
Naked Eye ◽  
Accuracy And Precision ◽  
Conventional Elisa ◽  
Naked Eye Detection

In this paper, a highly sensitive plasmonic enzyme-linked immunosorbent assay (pELISA) was developed for the naked-eye detection of fumonisin B1 (FB1). Glucose oxidase (GOx) was used as an alternative to horseradish peroxidase as the carrier of the competing antigen. GOx catalyzed the oxidation of glucose to produce hydrogen peroxide, which acted as a reducing agent to reduce Au3+ to Au on the surface of gold seeds (5 nm), This reaction led to a color change in the solution from colorless to purple, which was observable to the naked eye. Various parameters that could influence the detection performance of pELISA were investigated. The developed method exhibited a considerably high sensitivity for FB1 qualitative naked-eye detection, with a visible cut-off limit of 1.25 ng/mL. Moreover, the proposed pELISA showed a good linear range of 0.31–10 ng/mL with a half maximal inhibitory concentration (IC50) of 1.86 ng/mL, which was approximately 13-fold lower than that of a horseradish peroxidase- (HRP)-based conventional ELISA. Meanwhile, the proposed method was highly specific and accurate. In summary, the new pELISA exhibited acceptable accuracy and precision for sensitive naked-eye detection of FB1 in maize samples and can be applied for the detection of other chemical contaminants.

Naked eye detection of anions by alkynyl-ruthenium exo-receptors: selective recognition of fluoride anion

2005 ◽  
pp. 2924 ◽  
Author(s):  
Jean-Luc Fillaut ◽  
Julien Andriès ◽  
Loïc Toupet ◽  
Jean-Pierre Desvergne
Keyword(s):  
Selective Recognition ◽  
Fluoride Anion ◽  
Eye Detection ◽  
Naked Eye ◽  
Naked Eye Detection

Synthesis of new chromogenic sensors containing thiourea and selective detection for F–, H2PO4–, and Ac– anions

2020 ◽  
Vol 98 (10) ◽  
pp. 659-666
Author(s):  
Cheng Cao ◽  
Xingmei You ◽  
Lei Feng ◽  
Guanghong Luo ◽  
Guoren Yue ◽  
...  
Keyword(s):  
Anion Recognition ◽  
High Sensitivity ◽  
Eye Detection ◽  
H Nmr ◽  
Naked Eye ◽  
Step Procedure ◽  
Colour Changes ◽  
One Step ◽  
Naked Eye Detection ◽  
C Nmr

Two new chromogenic sensors 1-(2-hydroxyphenyl)-3-(4-nitrophenyl)thiourea 1 and 1-(3-hydroxypyridin-2-yl)-3-(4-nitrophenyl)thiourea 2 bearing nitrophenyl and thiourea groups were designed and synthesized by one-step procedure and characterized through 1H NMR, 13C NMR, FTIR, and MS. The anion recognition property of the receptors was studied via naked-eye detection, UV–vis, and 1H NMR. Based on the existence of amino gen and hydroxyl moieties in receptors, receptors 1 and 2 exhibit obvious selectivity by the redshift of UV–vis signals, colour changes through naked-eye detection, and binding effects for F–, H2PO4–, and Ac–. Surprisingly, the detection limits of receptor 1 for F– and Ac– were calculated to be 5.45 × 10−7 and 2.11 × 10−7 (mol/L)−1, respectively, which indicated that F– and Ac– can be identified with high sensitivity by receptor 1. Besides, simple “test strips” were developed and were used as sensors for recognition of F–, H2PO4–, or Ac– in DMSO solution. Lastly, the mechanisms of the recognition process were studied through DFT calculation and 1H NMR titration.

scholarly journals Recent Advances in Sensing Applications of Molecularly Imprinted Photonic Crystals

2021 ◽  
Vol 9 ◽  
Author(s):  
Jing Fan ◽  
Lili Qiu ◽  
Yu Qiao ◽  
Min Xue ◽  
Xiao Dong ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
High Sensitivity ◽  
Molecularly Imprinted ◽  
Naked Eye ◽  
Sensing Applications ◽  
Recent Advances ◽  
Molecular Imprinting Technology ◽  
Sensitivity And Selectivity ◽  
Target Molecules ◽  
Naked Eye Detection

Photonic crystals (PhCs) with a brightly colored structure are novel materials and are widely used in chemical and biological sensing. Combining PhCs with molecular imprinting technology (MIT), the molecularly imprinted PhC (MIPC) sensors are fabricated, which can specifically recognize the target molecules. Aside from high sensitivity and selectivity, the MIPC sensors could recognize the naked eye detection because of its optical properties. In this review, an overview of recent advances in sensing applications of MIPC sensors including the responsive mechanisms, application in environmental monitoring, and the application to human health were illustrated. The MIPC sensors all responded to the analytes specifically and also showed high sensitivity in real samples, which provided a method to realize the rapid, convenient, naked eye, and real-time detection. Furthermore, the current limitations and potential future directions of MIPC sensors were also discussed.

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