scholarly journals One-Step Assembly of Fluorescence-Based Cyanide Sensors from Inexpensive, Off-The-Shelf Materials

Sensors ◽  
2020 ◽  
Vol 20 (16) ◽  
pp. 4488
Author(s):  
Gregory E. Fernandes ◽  
Ya-Wen Chang ◽  
Akash Sharma ◽  
Sarah Tutt
Keyword(s):  
Aqueous Media ◽  
Cupric Chloride ◽  
Water Soluble ◽  
Free Cyanide ◽  
Turn On ◽  
Convenient Synthesis ◽  
One Step ◽  
Fluorescence Turn On ◽  
Fluorescence Quencher ◽  
Cyanide Sensing

We report a simple and versatile approach to assemble sensitive and selective fluorescence “turn-on” sensors for cyanide by combining three off-the-shelf materials; namely fluorescent dye, 1-vinyl imidazole polymer, and cupric chloride. The cyanide-sensing species is a non-fluorescent fluorophore-polymer-Cu2+ complex; which forms as a result of the imidazole polymer’s ability to bind both fluorophore and fluorescence quencher (Cu2+). Cyanide removes Cu2+ from these complexes; thereby “turning-on” sensor fluorescence. These sensors are water-soluble and have a detection limit of ~2.5 μM (CN−) in water. Our ternary complex-based sensing approach also enables facile emission tuning; we demonstrate the convenient, synthesis-free preparation of blue and green-emitting sensors using distyrylbiphenyl and fluorescein fluorophores, respectively. Furthermore; these ternary complexes are easily immobilized using agarose to create cyanide-sensing hydrogels; which are then used in a simple; novel microdiffusion apparatus to achieve interference-free cyanide analysis of aqueous media. The present study provides an inexpensive approach for portable; interference-free cyanide detection.

Fluorescence turn-on detection of cyanide anion based on viologen-quenched water-soluble hyperbranched polymer

Polymer ◽  
2013 ◽  
Vol 54 (4) ◽  
pp. 1323-1328 ◽  
Author(s):  
Seongwon Seo ◽  
Daigeun Kim ◽  
Geunseok Jang ◽  
Jongho Kim ◽  
Taek Seung Lee
Keyword(s):  
Hyperbranched Polymer ◽  
Water Soluble ◽  
Cyanide Anion ◽  
Turn On ◽  
Fluorescence Turn On

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.

Fluorescence turn-on for the highly selective detection of nitric oxide in vitro and in living cells

The Analyst ◽  
2016 ◽  
Vol 141 (8) ◽  
pp. 2600-2605 ◽  
Author(s):  
Xiaomei Liu ◽  
Shuang Liu ◽  
Gaolin Liang
Keyword(s):  
Nitric Oxide ◽  
Living Cells ◽  
Water Soluble ◽  
Sensitive Detection ◽  
Selective Detection ◽  
Turn On ◽  
Fluorescence Turn On

A water-soluble, biocompatible, small molecular fluorescent turn-on probe was developed for the highly selective and sensitive detection of NO in vitro and in living cells.

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

Selective and sensitive detection of aluminium ions in water via fluorescence “turn-on” with both solid and water soluble sensory polymer substrates

2014 ◽  
Vol 276 ◽  
pp. 52-57 ◽  
Author(s):  
Saúl Vallejos ◽  
Asunción Muñoz ◽  
Saturnino Ibeas ◽  
Felipe Serna ◽  
Félix Clemente García ◽  
...  
Keyword(s):  
Water Soluble ◽  
Sensitive Detection ◽  
Polymer Substrates ◽  
Turn On ◽  
Fluorescence Turn On

A one-step selective fluorescence turn-on detection of cysteine and homocysteine based on a facile CdTe/CdS quantum dots–phenanthroline system

2013 ◽  
Vol 787 ◽  
pp. 181-188 ◽  
Author(s):  
Sheng Chen ◽  
Jianniao Tian ◽  
Yixuan Jiang ◽  
Yanchun Zhao ◽  
Juanni Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Cds Quantum Dots ◽  
Turn On ◽  
One Step ◽  
Fluorescence Turn On
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