Chelation-enhanced fluorescence of phosphorus doped carbon nanodots for multi-ion detection

2017 ◽  
Vol 184 (7) ◽  
pp. 2063-2071 ◽  
Author(s):  
Khalid M. Omer ◽  
Aso Q. Hassan
Keyword(s):  
Carbon Nanodots ◽  
Ion Detection ◽  
Enhanced Fluorescence ◽  
Chelation Enhanced Fluorescence ◽  
Phosphorus Doped

A benzothiazole-based fluorescence turn-on sensor for copper(II)

2021 ◽  
Author(s):  
Gyeongjin Kim ◽  
Donghwan Choi ◽  
Cheal Kim
Keyword(s):  
Charge Transfer ◽  
Limit Of Detection ◽  
Theoretical Calculations ◽  
Enhanced Fluorescence ◽  
Turn On ◽  
Fluorescent Response ◽  
Chelation Enhanced Fluorescence ◽  
Fluorescence Turn On ◽  
Internal Charge Transfer ◽  
Internal Charge

Abstract A new benzothiazole-based chemosensor BTN (1-((Z)-(((E)-3-methylbenzo[d]thiazol-2(3H)-ylidene)hydrazono)methyl)naphthalen-2-ol) was synthesized for the detection of Cu2+. BTN could detect Cu2+ with “off-on” fluorescent response from colorless to yellow irrespective of presence of other cations. Limit of detection for Cu2+ was determined to be 3.3 µM. Binding ratio of BTN and Cu2+ turned out to be a 1:1 with the analysis of Job plot and ESI-MS. Sensing feature of Cu2+ by BTN was explained with theoretical calculations, which might be owing to internal charge transfer and chelation-enhanced fluorescence processes.

Sensitive Hg2+ Ion Detection Using Metal Enhanced Fluorescence of Novel Polyvinyl Pyrrolidone (PVP)-Templated Gold Nanoparticles

2018 ◽  
Vol 72 (11) ◽  
pp. 1645-1652 ◽  
Author(s):  
Kailong Dong ◽  
Jiasheng Zhou ◽  
Taiqun Yang ◽  
Shan Dai ◽  
Hao Tan ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Detection Limit ◽  
Au Nanoparticles ◽  
Polyvinyl Pyrrolidone ◽  
Quenching Mechanism ◽  
Ion Detection ◽  
Enhanced Fluorescence ◽  
Metal Enhanced Fluorescence ◽  
One Pot ◽  
Au Nps

In this study, we report a straightforward strategy for Hg2+ ion detection. Fluorescent Au nanoparticles (NPs) were one-pot synthesized using a polymer (polyvinyl pyrrolidone [PVP]) as both capping and fluorescence agent. The as-synthesized PVP-Au NPs showed a remarkably rapid response selectively for Hg2+ ions compared to 14 other metal ions. The detection limit of Hg2+ was estimated at 100 nM. We discuss the emission and quenching mechanism of the PVP-Au NPs, the former being attributed to metal enhanced fluorescence and the latter being related to static quenching by Hg2+. The fluorescence of PVP-Au NPs offers an efficient and reliable strategy for Hg2+ ions detection. They therefore have a great potential for applications in health and environmental monitoring.

Dynamic and static excimer: a versatile platform for single component white-light emission and chelation-enhanced fluorescence

2018 ◽  
Vol 6 (44) ◽  
pp. 12086-12094 ◽  
Author(s):  
Virendra Kumar ◽  
Bahadur Sk ◽  
Subhankar Kundu ◽  
Abhijit Patra
Keyword(s):  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Single Component ◽  
Sensitive Detection ◽  
Enhanced Fluorescence ◽  
Efficient Generation ◽  
Chelation Enhanced Fluorescence

Tailoring the formation of dynamic and static excimers in a C3-symmetric architecture led to efficient generation of white light and sensitive detection of Fe3+ and Al3+ in a single molecular platform.

Chelation enhanced fluorescence detection of non-metal ions

1989 ◽  
Vol 111 (23) ◽  
pp. 8735-8737 ◽  
Author(s):  
Michael E. Huston ◽  
Engin U. Akkaya ◽  
Anthony W. Czarnik
Keyword(s):  
Metal Ions ◽  
Fluorescence Detection ◽  
Enhanced Fluorescence ◽  
Chelation Enhanced Fluorescence

A novel peptide-based fluorescent chemosensor for measuring zinc ions using different excitation wavelengths and application in live cell imaging

2015 ◽  
Vol 3 (17) ◽  
pp. 3617-3624 ◽  
Author(s):  
Peng Wang ◽  
Jiang Wu ◽  
Panpan Zhou ◽  
Weisheng Liu ◽  
Yu Tang
Keyword(s):  
Aqueous Solution ◽  
Live Cell Imaging ◽  
Cell Imaging ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Living Cells ◽  
Fluorescent Chemosensor ◽  
Zinc Ions ◽  
Enhanced Fluorescence ◽  
Chelation Enhanced Fluorescence

A novel peptide-based fluorescent chemosensor containing both tryptophan and a dansyl fluorophore has been designed to detect Zn2+ in 100% aqueous solution and living cells via two pathways including fluorescence resonance energy transfer and chelation enhanced fluorescence.

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