Fluorescence-based measurements for the determination of nitrite using a coumarin derivative sensor based on inner filter effect

2020 ◽  
Vol 12 (8) ◽  
pp. 1107-1114 ◽  
Author(s):  
Xianfeng Wang ◽  
Jingzhou Hou ◽  
Xin Shen ◽  
Qiang He ◽  
Changjun Hou ◽  
...  

Illustration of IFE-based fluorescent sensor for nitrite using coumarin derivative.

2016 ◽  
Vol 8 (28) ◽  
pp. 5701-5706 ◽  
Author(s):  
Ammu Rosin Jose ◽  
Unni Sivasankaran ◽  
Shalini Menon ◽  
Krishnapillai Girish Kumar

A turn off sensor for sudan I based on fluorescent Si NPs which works via an inner filter effect (IFE).


The Analyst ◽  
2020 ◽  
Vol 145 (4) ◽  
pp. 1227-1235 ◽  
Author(s):  
Xiao-Man Wu ◽  
Jun-Hua Zhang ◽  
Zi-Shuo Feng ◽  
Wen-Xin Chen ◽  
Fei Zhang ◽  
...  

A “turn-off” fluorescent sensor based on glutathione-stabilized copper nanoclusters (GSH-Cu NCs) was prepared for the sensitive detection of RFP via a static quenching strategy caused by the inner filter effect (IFE).


2020 ◽  
Vol 720 ◽  
pp. 137680 ◽  
Author(s):  
Xin Wang ◽  
Yongli Liu ◽  
Qingxiang Zhou ◽  
Xueying Sheng ◽  
Yi Sun ◽  
...  

2020 ◽  
Vol 98 (5) ◽  
pp. 222-227
Author(s):  
Keke Ning ◽  
Guoqiang Xiang ◽  
Cuicui Wang ◽  
Jingxing Wang ◽  
Xiaohong Qiao ◽  
...  

In this work, poly(sodium 4-styrenesulfonate) (PSS) modified molybdenum disulfide quantum dots (MoS2-PSS QDs) were synthesized via a simple hydrothermal method using l-cysteine and anhydrous sodium molybdate as precursors and PSS as a modification reagent, and a selective and sensitive fluorescent sensing method for the determination of p-nitrophenol (p-NP) based on their UV emission was developed. The obtained MoS2-PSS QDs have an obvious UV emission peak (390 nm) with quantum yield of 5.13%. The strong absorption peak of p-NP at 400 nm has large spectral overlap with the UV emission peak (390 nm) of MoS2-PSS QDs. Because of this p-NP absorption, the fluorescence of MoS2-PSS QDs at 390 nm is quenched with the introduction of p-NP via the inner filter effect (IFE) and the decreased fluorescence intensity was linearly proportional to the p-NP concentration in the range of 1–20 μmol/L, leading to a detection limit of 0.13 μmol/L for p-NP. The MoS2 QDs-based fluorescent probe for p-NP is sensitive and selective and was successfully applied in the determination of p-NP in the pond water samples with satisfactory results.


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