An ammonia-based etchant for attaining copper nanoclusters with green fluorescence emission

Nanoscale ◽  
2018 ◽  
Vol 10 (14) ◽  
pp. 6467-6473 ◽  
Author(s):  
Hao-Hua Deng ◽  
Ke-Lin Li ◽  
Quan-Quan Zhuang ◽  
Hua-Ping Peng ◽  
Qiong-Qiong Zhuang ◽  
...  
Keyword(s):  
Human Serum ◽  
Copper Nanoparticles ◽  
Fluorescence Emission ◽  
Green Fluorescence ◽  
Copper Nanoclusters ◽  
Turn On ◽  
Fluorescence Turn On

Fluorescence turn-on detection of urea in human serum is developed based on the ammonia-triggered etching of copper nanoparticles.

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.

Investigation of the surface confinement effect of copper nanoclusters: construction of an ultrasensitive fluorescence turn-on bio-enzyme sensing platform

Nanoscale ◽  
2019 ◽  
Vol 11 (45) ◽  
pp. 21927-21933 ◽  
Author(s):  
Jinlan Yang ◽  
Naizhong Song ◽  
Qiong Jia
Keyword(s):  
Confinement Effect ◽  
Copper Nanoclusters ◽  
Turn On ◽  
Sensing Platform ◽  
Surface Confinement ◽  
Effect Of Copper ◽  
Fluorescence Turn On

An ultrasensitive fluorescence turn-on assay was developed for hyaluronidase detection based on the surface confinement effect of CuNCs.

A nuclease-assisted label-free aptasensor for fluorescence turn-on detection of ATP based on the in situ formation of copper nanoparticles

2017 ◽  
Vol 87 ◽  
pp. 760-763 ◽  
Author(s):  
Quanwei Song ◽  
Ruihua Wang ◽  
Feifei Sun ◽  
Hongkun Chen ◽  
Zoumengke Wang ◽  
...  
Keyword(s):  
Copper Nanoparticles ◽  
Label Free ◽  
Turn On ◽  
In Situ Formation ◽  
Fluorescence Turn On

A selective fluorescence turn-on sensing system for evaluation of Cu2+ polluted water based on ultra-fast formation of fluorescent copper nanoclusters

2015 ◽  
Vol 7 (6) ◽  
pp. 2278-2282 ◽  
Author(s):  
Dan Li ◽  
Biao Li ◽  
Sung Ik Yang
Keyword(s):  
Detection System ◽  
Polluted Water ◽  
Copper Nanoclusters ◽  
Turn On ◽  
Sensing System ◽  
Water Based ◽  
Fluorescence Turn On

We report on a rapid and selective fluorescence turn-on detection system for Cu2+ based on the formation of highly fluorescent copper nanoclusters (CuNCs).

Amplified Fluorescence Turn-on Assay for Mercury(II) Based on Conjugated Polyfluorene Derivatives and Nanospheres

2008 ◽  
Vol 1134 ◽  
Author(s):  
Yusong Wang ◽  
Bin Liu
Keyword(s):  
Metal Ion ◽  
Resonance Energy Transfer ◽  
Fluorescence Emission ◽  
Resonance Energy ◽  
High Sensitivity ◽  
Probe Design ◽  
Turn On ◽  
Sensitivity And Selectivity ◽  
Fluorescence Turn On ◽  
Polyfluorene Derivatives

AbstractDetection of mercury with high sensitivity and selectivity constitutes a significant research concern. Here, we report an amplified fluorescence turn-on assay for mercury(II) with an improved performance. This sensing system takes advantage of optically amplifying fluorescent conjugated polyfluorene derivatives and DNA immobilized silica nanospheres (NSs) in addition to the specific thymine- mercury(II)-thymine(T- Hg2+-T) interaction. The employment of ion-specific T- Hg2+-T coordination increases the melting temperature (Tm) of the double-stranded DNA (dsDNA) on the hybridized NS surface. After thermal washing at 45 °C, the Hg2+ treated sample (dsDNA-NS) was effectively differentiated from that treated with nonspecific ions through monitoring fluorescence emission of fluorescein (Fl) labeled target DNA remained on the NS surface. Finally, a cationic conjugated polyfluorene derivative (CCP) was introduced to electrostatically associate with the DNA molecules on the NS surface, resulting in an amplified Fl signal via fluorescence resonance energy transfer (FRET) from the CCP to the dye molecule. In comparison with the use of Fl alone as a signal reporter, the presence of CCP significantly enhances the detection fluorescence intensity, reduces false-positive signal, and improves the detection selectivity for mercury(II). Further improvement in the probe design could yield more efficient metal ion sensors, which have the potential to be operated at room temperature and for the detection of other metal ions besides mercury(II).

Human Serum Albumin-Occupying-Based Fluorescence Turn-On Analysis of Antiepileptic Drug Tiagabine Hydrochloride

2020 ◽  
Vol 92 (5) ◽  
pp. 3555-3562 ◽  
Author(s):  
Zhen Zou ◽  
Xiaodou Liao ◽  
Le Yang ◽  
Ziyun Huang ◽  
Hua Yang ◽  
...  
Keyword(s):  
Human Serum Albumin ◽  
Serum Albumin ◽  
Human Serum ◽  
Antiepileptic Drug ◽  
Turn On ◽  
Fluorescence Turn On

scholarly journals Photolysis of dimethoxynitrobenzyl-“caged” acids yields fluorescent products

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Aleksey Yu. Vorob’ev ◽  
Tatyana Yu. Dranova ◽  
Alexander E. Moskalensky
Keyword(s):  
Water Environment ◽  
Fluorescence Emission ◽  
Turn On ◽  
Emulsion Droplets ◽  
Self Organized ◽  
Biological Studies ◽  
Orange Fluorescence ◽  
Fluorescent Products ◽  
Arachidonic Acids ◽  
Fluorescence Turn On

Abstract Carboxylic acids conjugated with 4,5-dimethoxy-2-nitrobenzyl photoremovable protecting group are well known and widely used for biological studies. In this paper, we study the photolysis of likewise “caged” acetic, caprylic and arachidonic acids. Unexpectedly, we observed huge growth of fluorescence emission at ~430 nm during photolysis. Following further UV irradiation, a product with fluorescence at longer wavelength was formed (470 nm excitation / ~500–600 nm emission). While it may be used to monitor the “uncaging”, these fluorescent products may interfere with widespread dyes such as fluorescein in biomedical experiments. This effect might be negligible if the photolysis products dissolve in the medium. On the other hand, we observed that arachidonic and caprylic acids derivatives self-organize in emulsion droplets in water environment due to long lipophilic chains. Illumination of droplets by UV rapidly induces orange fluorescence excited by 488 nm light. This fluorescence turn-on was fast (~0.1 s) and apparently caused by the accumulation of water-insoluble fluorescent residuals inside droplets. These self-organized lipophilic structures with fluorescence turn-on capability may be of interest for biomedical and other application. We have identified and hypothesized some compounds which may be responsible for the observed fluorescense.

Multidentate polymers stabilized water-dispersed copper nanoclusters: facile photoreduction synthesis and selective fluorescence turn-on response

RSC Advances ◽  
2014 ◽  
Vol 4 (55) ◽  
pp. 29083 ◽  
Author(s):  
Rijun Gui ◽  
Jie Sun ◽  
Xiaoli Cao ◽  
Yanfeng Wang ◽  
Hui Jin
Keyword(s):  
Copper Nanoclusters ◽  
Turn On ◽  
Fluorescence Turn On

A Boronic Acid-Based Fluorescence Hydrogel for Monosaccharide Detection

2018 ◽  
Author(s):  
Suying Xu ◽  
Adam Sedgwick ◽  
Souad Elfecky ◽  
Wenbo Chen ◽  
Ashley Jones ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Boronic Acid ◽  
Binding Constants ◽  
Strong Fluorescence ◽  
Fluorescence Response ◽  
Turn On ◽  
Fluorescence Turn On ◽  
Hydrogel System

<p>A boronic acid-based anthracene fluorescent probe was functionalised with an acrylamide unit to incorporate into a hydrogel system for monosaccharide detection<i>. </i>In solution, the fluorescent probe<b> </b>displayed a strong fluorescence turn-on response upon exposure to fructose, and an expected trend in apparent binding constants, as judged by a fluorescence response where D-fructose > D-galactose > D-mannose > D-glucose. The hydrogel incorporating the boronic acid monomer demonstrated the ability to detect monosaccharides by fluorescence with the same overall trend as the monomer in solution with the addition of fructose resulting in a 10-fold enhancement (≤ 0.25 M). <b><u></u></b></p>

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