scholarly journals A highly sensitive and selective chemosensor for Pb2+ based on quinoline–coumarin

RSC Advances ◽  
2018 ◽  
Vol 8 (59) ◽  
pp. 33947-33951 ◽  
Author(s):  
Xianjiao Meng ◽  
Duanlin Cao ◽  
Zhiyong Hu ◽  
Xinghua Han ◽  
Zhichun Li ◽  
...  
Keyword(s):  
Fluorescent Chemosensor ◽  
Eye Detection ◽  
Naked Eye ◽  
Highly Sensitive ◽  
Naked Eye Detection

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

A highly sensitive naked-eye fluorescent probe for trace hydrazine based on ‘C-CN’ bond cleavage

The Analyst ◽  
2018 ◽  
Vol 143 (18) ◽  
pp. 4354-4358 ◽  
Author(s):  
Hai Xu ◽  
Zhen Huang ◽  
Yaqian Li ◽  
Biao Gu ◽  
Zile Zhou ◽  
...  
Keyword(s):  
Detection Limit ◽  
Fluorescent Probe ◽  
Water Samples ◽  
Bond Cleavage ◽  
Eye Detection ◽  
Naked Eye ◽  
Real Water Samples ◽  
Highly Sensitive ◽  
First Time ◽  
Naked Eye Detection

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.

Highly sensitive and selective colorimetric naked-eye detection of Cu2+ in aqueous medium using a hydrazone chemosensor

2015 ◽  
Vol 215 ◽  
pp. 241-248 ◽  
Author(s):  
Shengli Hu ◽  
Jingjing Song ◽  
Fang Zhao ◽  
Xianggao Meng ◽  
Gongying Wu
Keyword(s):  
Aqueous Medium ◽  
Eye Detection ◽  
Naked Eye ◽  
Highly Sensitive ◽  
Naked Eye Detection

scholarly journals Fluorescence and Naked-Eye Detection of Pb2+ in Drinking Water Using a Low-Cost Ionophore Based Sensing Scheme

2018 ◽  
Author(s):  
Aron Hakonen ◽  
Niklas Strömberg
Keyword(s):  
Drinking Water ◽  
Tap Water ◽  
Low Cost ◽  
Consumer Products ◽  
Lead Ion ◽  
Eye Detection ◽  
Naked Eye ◽  
Highly Sensitive ◽  
Naked Eye Detection

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.

A selective purine-based fluorescent chemosensor for the “naked-eye” detection of zinc ions (Zn2+): applications in live cell imaging and test strips

2020 ◽  
Vol 44 (35) ◽  
pp. 15195-15201 ◽  
Author(s):  
Haiyan Xu ◽  
Wei Chen ◽  
Weixia Zhang ◽  
Lixin Ju ◽  
Hongfei Lu
Keyword(s):  
Live Cell Imaging ◽  
Cell Imaging ◽  
High Selectivity ◽  
Living Cells ◽  
Fluorescent Chemosensor ◽  
Zinc Ions ◽  
Eye Detection ◽  
Naked Eye ◽  
Turn On ◽  
Naked Eye Detection

In this work, a novel purine based probe PTAHN was successfully designed and synthesized. PTAHN displayed high selectivity towards Zn2+via turn-on fluorescence. What's more, PTAHN can be proficiently employed for imaging Zn2+ in living cells.

scholarly journals Fluorescence and Naked-Eye Detection of Pb2+ in Drinking Water Using a Low-Cost Ionophore Based Sensing Scheme

2018 ◽  
Author(s):  
Aron Hakonen ◽  
Niklas Strömberg
Keyword(s):  
Drinking Water ◽  
Tap Water ◽  
Low Cost ◽  
Consumer Products ◽  
Lead Ion ◽  
Eye Detection ◽  
Naked Eye ◽  
Highly Sensitive ◽  
Naked Eye Detection

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. Low-cost ionophore Benzo-18-Crown-6-ether was used, and a simple test-tube mix, shake 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.

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