scholarly journals Enhanced upconversion fluorescent probe of single NaYF4:Yb3+/Er3+/Zn2+ nanoparticles for copper ion detection

RSC Advances ◽  
2018 ◽  
Vol 8 (66) ◽  
pp. 37618-37622 ◽  
Author(s):  
Baobao Zhang ◽  
Jiajia Meng ◽  
Xiaohu Mi ◽  
Changjian Zhang ◽  
Zhenglong Zhang ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Fluorescent Probe ◽  
Single Particle ◽  
Copper Ion ◽  
Ion Detection

Single-particle fluorescent probe for copper ion detection based on fluorescence quenching.

scholarly journals Copper Ion Detection Method Based on a Quantum Dot Fluorescent Probe

2021 ◽  
Author(s):  
Pu YANG ◽  
Feng DONG ◽  
Yaguang YU ◽  
Jiahui SHI ◽  
Ming SUN
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Fluorescence Quenching ◽  
Linear Relationship ◽  
Fluorescent Probe ◽  
Metal Ion ◽  
Copper Ion ◽  
Quantitative Detection ◽  
Correction Coefficient ◽  
Modeling And Analysis

The heavy metal ion Cu2+ was used as the research object in this study. Cu2+ was detected using a cysteine- and glutathione-modified cadmium telluride quantum dot solution. Compounds of Cu2+ and modified quantum dots on the surface caused the fluorescence quenching of quantum dots. A linear relationship existed between the concentration and the intensity of the change in fluorescence quenching. Using this linear relationship, the quantitative detection of the Cu2+ content in the solution by quantum dots was achieved; the detection band was 476-800 nm. Under optimized conditions, the detection limit of the method was 3.58×10-5 mol/L (S/N=3, n=11), and the linear range was 3×10-7 to 8×10-4 mol/L. In a certain experimental environment, standard normal variate preprocessing of the characteristic band and partial least squares modeling and analysis yielded good self-prediction and actual prediction abilities. The correction coefficient was 0.9006. The RMSEC was 8.83084 µmol/L, the determination coefficient of the validation set was 0.8686, and the RMSEP was 5.4320 µmol/L. The results showed that the modeling effect was good in the experiment, the operation was simple and convenient, and the experiment was fast, reliable, and nonpolluting, indicating that the method of detecting Cu2+ using a quantum dot fluorescent probe was feasible.

Highly sensitive ruthenium complex-based fluorescent probe for copper ion detection

Tetrahedron ◽  
2020 ◽  
Vol 76 (43) ◽  
pp. 131526 ◽  
Author(s):  
Xiao Li Xia ◽  
Dao Bin Zhang ◽  
Jiu Long Zhang ◽  
Shou Zhi Pu
Keyword(s):  
Fluorescent Probe ◽  
Ruthenium Complex ◽  
Copper Ion ◽  
Ion Detection ◽  
Highly Sensitive

scholarly journals Cyanine-based Fluorescent Probe for Cyanide Ion Detection

2021 ◽  
Author(s):  
Mahesh Gosi ◽  
Nagaraju Marepu ◽  
Yeturu Sunandamma
Keyword(s):  
Fluorescent Probe ◽  
Ion Detection ◽  
Cyanide Ion

scholarly journals Graphdiyne nanosheets as a platform for accurate copper(ii) ion detection via click chemistry and fluorescence resonance energy transfer

RSC Advances ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 5320-5324
Author(s):  
Chenchen Ge ◽  
Jiaofu Li ◽  
Dou Wang ◽  
Kongpeng Lv ◽  
Quan Liu ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Fluorescence Quenching ◽  
Click Chemistry ◽  
Fluorescence Resonance Energy Transfer ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
High Specificity ◽  
Ion Detection ◽  
Fluorescence Resonance

Cu2+ detection was performed by taking advantage of the fluorescence quenching ability of graphdiyne and the high specificity of click chemistry.

An “on–off” fluorescent probe based on cucurbit[7]uril for highly sensitive determination of ammonia nitrogen in aquaculture water

2021 ◽  
Author(s):  
Zhen Li ◽  
Tan Wang ◽  
Xianbao Xu ◽  
Cong Wang ◽  
Daoliang Li
Keyword(s):  
Fluorescence Quenching ◽  
Inclusion Complex ◽  
Fluorescent Probe ◽  
Ammonia Nitrogen ◽  
Highly Sensitive ◽  
Sensitive Determination ◽  
Aquaculture Water

A novel “on–off” fluorescent probe for the determination of ammonia nitrogen has been synthesized. URO can replace PAL into the cavity of CB[7] to form a stable inclusion complex, eventually forming the fluorescence quenching system of URO@CB[7].

Measurement of tissue oxygen with a fluorescent probe

1976 ◽  
Vol 41 (4) ◽  
pp. 598-602 ◽  
Author(s):  
I. S. Longmuir ◽  
J. A. Knopp
Keyword(s):  
Oxygen Consumption ◽  
Fluorescence Quenching ◽  
Fluorescent Probe ◽  
Spatial Resolution ◽  
Tissue Oxygen ◽  
Quenching Of Fluorescence ◽  
Oxygen Gradients ◽  
Geometrical Factors

Evidence is presented that pyrenebutyric acid is nontoxic at the concentrations required for the measurement of fluorescence quenching by physiological concentrations of oxygen. It appears that this molecule can be used tomeasure tissue oxygen since it does not interfere with oxygen consumption. Equally, tissue components do not interfere with the quenching of fluorescence to such an extent as to invalidate the method. The spatial resolution of the technique is limited by some tissue geometrical factors which do not,however, appear to be great enough to prevent its use to measure intercapillary oxygen gradients.

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