Simple quinoline-based “turn-on” fluorescent sensor for imaging copper (II) in living cells

2014 ◽  
Vol 92 (11) ◽  
pp. 1092-1097 ◽  
Author(s):  
Chen Zhou ◽  
Ning Xiao ◽  
Yapeng Li
Keyword(s):  
Density Functional ◽  
Copper Ions ◽  
Fluorescent Sensor ◽  
Aqueous Media ◽  
Density Functional Theory Calculations ◽  
Quinoline Derivative ◽  
Electron Transfer Mechanism ◽  
Organic Chromophores ◽  
Turn On ◽  
Fluorescence Turn On

In this work, a novel fluorescent sensor based on a quinoline derivative was designed and synthesized for detecting copper ions in a near-aqueous media. According to its extra-nuclear structure, copper (II) normally exhibits effectiveness for quenching the singlet excited state of organic chromophores through a fast electron transfer mechanism. However, this molecule displayed a strong fluorescence “turn-on” phenomenon upon addition of Cu2+, which was rarely reported in previous research. In addition, density functional theory calculations were adopted to investigate the molecular orbitals as well as the spatial structure. Furthermore, this sensor was applied into living SGC-7901 cells to extend its application in biological systems.

A “turn-on” fluorescent sensor for cytosine in aqueous media based on diamino-bridged biphenyl acrylonitrile

2021 ◽  
Author(s):  
Jiaojiao Chen ◽  
Bangyi Zhou ◽  
Yongsheng Li ◽  
Linlu Zheng ◽  
Hongyu Guo ◽  
...  
Keyword(s):  
Fluorescent Sensor ◽  
Aqueous Media ◽  
Turn On

A “turn-on” fluorescent sensor for cytosine in aqueous media was prepared.

scholarly journals Cytidine-stabilized copper nanoclusters as a fluorescent probe for sensing of copper ions and hemin

RSC Advances ◽  
2018 ◽  
Vol 8 (17) ◽  
pp. 9057-9062 ◽  
Author(s):  
Yong Wang ◽  
Tianxia Chen ◽  
Zhengtao Zhang ◽  
Yongnian Ni
Keyword(s):  
Fluorescent Probe ◽  
Copper Ions ◽  
Simultaneous Detection ◽  
Inner Filter Effect ◽  
Copper Nanoclusters ◽  
Turn On ◽  
Filter Effect ◽  
Fluorescence Turn On

A sensitive and selective fluorescence “turn on–off” strategy for simultaneous detection of Cu2+and hemin was proposed on the basis of the formation of fluorescent CuNCs and the inner filter effect of hemin on the fluorescence of the CuNCs.

para-Hydroxy Thiophenol-Coated CdSe/ZnS Quantum Dots as a Turn-On Fluorescent Probe for H2O2 Detection in Aqueous Media

2018 ◽  
Vol 71 (12) ◽  
pp. 971 ◽  
Author(s):  
Xiaomei Wang ◽  
Yong Luo ◽  
Hu Xu ◽  
Dan Li ◽  
Yuhong Wang
Keyword(s):  
Quantum Dots ◽  
Limit Of Detection ◽  
Aqueous Media ◽  
Hydroxy Ketone ◽  
Hole Transfer ◽  
Turn On ◽  
H2o2 Detection ◽  
Potential Alternative ◽  
Fluorescence Turn On ◽  
Optimized Conditions

Since hydrogen peroxide plays an important role in various fields, a facile, simple, highly selective, and stable analytic method for H2O2 is desirable. Semiconductor quantum dots (QDs) have acted as a potential alternative for organic fluorophores in fluorescence analytical fields due to their superior optical properties. Herein, we report hydrophilic p-hydroxy thiophenol (p-HTP) coated CdSe/ZnS QDs (denoted as p-HTP-QDs) acting as a selective fluorescence ‘turn-on’ probe for H2O2 in aqueous media. The obtained p-HTP-QD probe exhibits weak fluorescence, which stems from hole transfer from the QDs to p-HTP. The presence of H2O2 induces an oxidative structural transformation of p-HTP in p-HTP-QDs from a phenol structure to an α-hydroxy ketone derivative, which extremely reduces the driving force for hole transfer. Thus, the QDs photoluminescence (PL) was re-switched on. Under optimized conditions, an excellent linear relationship between fluorescence response and H2O2 concentration could be produced with a linear range from 0.309 to 4.900mM. The limit of detection of this probe was found to be 0.135mM. Moreover, the present probe exhibited a high selectivity of H2O2 over other reactive oxygen species/reactive nitrogen species (ROS/RNS) and was successfully used in the detection of H2O2 in real water samples.

A real-time fluorescent sensor specific to Mg2+: crystallographic evidence, DFT calculation and its use for quantitative determination of magnesium in drinking water

2015 ◽  
Vol 44 (6) ◽  
pp. 2755-2762 ◽  
Author(s):  
Guangwen Men ◽  
Chunrong Chen ◽  
Shitong Zhang ◽  
Chunshuang Liang ◽  
Ying Wang ◽  
...  
Keyword(s):  
Drinking Water ◽  
Quantitative Determination ◽  
Real Time ◽  
Dft Calculation ◽  
Fluorescent Sensor ◽  
Turn On ◽  
Quantitative Monitoring ◽  
Fluorescence Turn On

An “off-the-shelf” fluorescence “turn-on” Mg2+ chemosensor BCSA has been developed for real-time quantitative monitoring of magnesium in drinking water.

A fluorescence ‘turn-on’ chemodosimeter for selective detection of Nb5+ ions in mixed aqueous media

2013 ◽  
Vol 42 (36) ◽  
pp. 12819 ◽  
Author(s):  
Abhishek Kumar Gupta ◽  
Abhimanew Dhir ◽  
Chullikkattil P. Pradeep
Keyword(s):  
Aqueous Media ◽  
Selective Detection ◽  
Turn On ◽  
Fluorescence Turn On
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