Cysteine capped copper/molybdenum bimetallic nanoclusters for fluorometric determination of methotrexate via the inner filter effect

2019 ◽  
Vol 186 (3) ◽  
Author(s):  
Yowan Nerthigan ◽  
Amit Kumar Sharma ◽  
Sunil Pandey ◽  
Hui-Fen Wu
Keyword(s):  
Inner Filter Effect ◽  
Fluorometric Determination ◽  
Bimetallic Nanoclusters ◽  
Filter Effect

Sensitive Naked‐eye and Fluorescence Determination of Acetylcholinesterase Activity using Cu/Ag Nanoclusters Based on Inner Filter Effect

2019 ◽  
Vol 4 (25) ◽  
pp. 7639-7644
Author(s):  
Yanyue Li ◽  
Yanling Hu ◽  
Yu He ◽  
Yili Ge ◽  
Gongwu Song ◽  
...  
Keyword(s):  
Inner Filter Effect ◽  
Acetylcholinesterase Activity ◽  
Naked Eye ◽  
Fluorescence Determination ◽  
Filter Effect ◽  
Ag Nanoclusters

UV-emitting polyelectrolyte-modified MoS2 quantum dots for selective determination of nitrophenol in water samples based on inner filter effect

2020 ◽  
Vol 98 (5) ◽  
pp. 222-227
Author(s):  
Keke Ning ◽  
Guoqiang Xiang ◽  
Cuicui Wang ◽  
Jingxing Wang ◽  
Xiaohong Qiao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Water Samples ◽  
Sodium Molybdate ◽  
Inner Filter Effect ◽  
Pond Water ◽  
Emission Peak ◽  
Selective Determination ◽  
Uv Emission ◽  
Filter Effect

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.

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 ◽  
...  
Keyword(s):  
Fluorescent Sensor ◽  
Inner Filter Effect ◽  
Coumarin Derivative ◽  
Filter Effect

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

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