Highly sensitive and selective naked eye detection of fluoride anion with isatin-thiazole hybrid molecule

Measurement ◽  
2020 ◽  
Vol 154 ◽  
pp. 107457
Author(s):  
Azeem Haider ◽  
Mukhtiar Ahmed ◽  
Muhammad Moazzam Naseer
The Analyst ◽  
2018 ◽  
Vol 143 (18) ◽  
pp. 4354-4358 ◽  
Author(s):  
Hai Xu ◽  
Zhen Huang ◽  
Yaqian Li ◽  
Biao Gu ◽  
Zile Zhou ◽  
...  

The ‘C–CN’ bond cleavage was applied to the recognition of N2H4 for the first time; the obvious change in color could be used for “naked-eye” detection; the corresponding detection limit was found to be 5.81 × 10−8 M (1.65 ppb); the probe could be applied for N2H4 detection in real water samples.


2015 ◽  
Vol 215 ◽  
pp. 241-248 ◽  
Author(s):  
Shengli Hu ◽  
Jingjing Song ◽  
Fang Zhao ◽  
Xianggao Meng ◽  
Gongying Wu

2021 ◽  
Vol 9 ◽  
Author(s):  
Zhifeng Deng ◽  
Cheng Wang ◽  
Haichang Zhang ◽  
Taotao Ai ◽  
Kaichang Kou

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.


Author(s):  
Aron Hakonen ◽  
Niklas Strömberg

Drinking water contamination of lead from various environmental sources, leaching consumer products and intrinsic water-pipe infrastructure is still today a matter of great concern. Therefore, new highly sensitive and convenient Pb2+ measurement schemes are necessary, especially for in-situ measurements at a low-cost. Within this work dye/ionophore/Pb2+ co-extraction and effective water phase de-colorization was utilized for highly sensitive lead measurements and sub-ppb naked-eye detection. A low-cost ionophore Benzo-18-Crown-6-ether was used, and a simple test-tube mix and separate procedure was developed. Instrumental detection limits were in the low ppt region (LOD=3, LOQ=10), and naked-eye detection was 500 ppt. Note, however, that this sensing scheme still has improvement potential as concentrations of fluorophore and ionophore were not optimized. Artificial tap-water samples, leached by a standardized method, demonstrated drinking water application. Implications for this method are convenient in-situ lead ion measurements.


RSC Advances ◽  
2018 ◽  
Vol 8 (59) ◽  
pp. 33947-33951 ◽  
Author(s):  
Xianjiao Meng ◽  
Duanlin Cao ◽  
Zhiyong Hu ◽  
Xinghua Han ◽  
Zhichun Li ◽  
...  

A highly sensitive and selective fluorescent chemosensor 1 was synthesized and used for naked eye detection of Pb2+.


2005 ◽  
pp. 2924 ◽  
Author(s):  
Jean-Luc Fillaut ◽  
Julien Andriès ◽  
Loïc Toupet ◽  
Jean-Pierre Desvergne

Sign in / Sign up

Export Citation Format

Share Document