Novel fluorescent sensors based on benzimidazo[2,1-a]benz[de]isoquinoline-7-one-12-carboxylic acid for Cu2+

RSC Advances ◽  
2014 ◽  
Vol 4 (100) ◽  
pp. 56863-56869 ◽  
Author(s):  
Zheng Liu ◽  
Yuhua Qi ◽  
Chaoxia Guo ◽  
Yingying Zhao ◽  
Xiaofeng Yang ◽  
...  
Keyword(s):  
Detection Limit ◽  
Carboxylic Acid ◽  
Fluorescent Sensors ◽  
Color Changes ◽  
Turn On ◽  
Buffer Solutions ◽  
Fluorescence Turn On

(1) Two new fluorescent sensors were developed based on benzimidazo[2,1-a]benz[de]isoquinoline-7-one. (2) BothC1andC2showed fluorescence turn-on response toward Cu2+in buffer solutions. (3) The detection limit of C1 towards Cu2+reached 5.7 × 10−8M. (4) The Cu2+sensing ofC1andC2were both based on the PET process. (5) Addition of OH−could lead to significantly color changes ofC1solution.

scholarly journals A 7-Hydroxybenzoxazinone-Containing Fluorescence Turn-On Probe for Biothiols and Its Bioimaging Applications

Molecules ◽  
2019 ◽  
Vol 24 (17) ◽  
pp. 3102 ◽  
Author(s):  
Bin Li ◽  
Datong Zhang ◽  
Ruibing An ◽  
Yaling Zhu
Keyword(s):  
Amino Acids ◽  
Detection Limit ◽  
High Resistance ◽  
Hela Cells ◽  
Fluorescence Enhancement ◽  
Stokes Shift ◽  
Potential Utility ◽  
Strong Fluorescence ◽  
Turn On ◽  
Fluorescence Turn On

In this work, a novel 7-hydroxybenzoxazinone-based fluorescent probe (PBD) for the selective sensing of biothiols is reported. Upon treatment with biothiols, PBD shows a strong fluorescence enhancement (up to 70-fold) and a large Stokes shift (155 nm). Meanwhile, this probe exhibits high resistance to interference from other amino acids and competing species. PBD features good linearity ranges with a low detection limit of 14.5 nM for glutathione (GSH), 17.5 nM for cysteine (Cys), and 80.0 nM for homocysteine (Hcy), respectively. Finally, the potential utility of this probe for biothiol sensing in living HeLa cells is demonstrated.

Thieno[3,2-c]pyran: an ESIPT based fluorescence “turn-on” molecular chemosensor with AIE properties for the selective recognition of Zn2+ ion

2020 ◽  
Vol 44 (28) ◽  
pp. 12019-12026 ◽  
Author(s):  
Divya Singhal ◽  
Ismail Althagafi ◽  
Ashish Kumar ◽  
Saroj Yadav ◽  
Ashok K. Prasad ◽  
...  
Keyword(s):  
Detection Limit ◽  
Selective Recognition ◽  
Turn On ◽  
Low Detection Limit ◽  
Fluorescence Turn On

Thieno[3,2-c]pyran was synthesized as a fluorescent turn-on chemosensor for the selective recognition of Zn2+ ions with a low detection limit (0.67 μM), and it also exhibited AIE properties.

A diketopyrrolopyrrole-based fluorescence turn-on probe for the detection of Pb2+in aqueous solution and living cells

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 52004-52008 ◽  
Author(s):  
Xiaofeng Yang ◽  
Yan Zhang ◽  
Yexin Li ◽  
Xiaolei Liu ◽  
Jiaxin Mao ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Detection Limit ◽  
Fluorescent Probe ◽  
Living Cells ◽  
Turn On ◽  
Low Detection Limit ◽  
Fluorescence Turn On

A diketopyrrolopyrrole-based fluorescent probeDPP-HBTbearing a benzothiazole hydrazone motif exhibited an obvious fluorescent turn-on response toward Pb2+ions with a low detection limit of 2.3 × 10−10M in aqueous solution.

scholarly journals Reversible Fluorescent Turn-on Sensors for Fe3+ based on a Receptor Composed of Tri-oxygen Atoms of Amide Groups in Water

2018 ◽  
Vol 16 (1) ◽  
pp. 1268-1274 ◽  
Author(s):  
Jiaoliang Wang ◽  
Liping Long ◽  
Guing Xiao ◽  
Fang Fang
Keyword(s):  
Limit Of Detection ◽  
Pure Water ◽  
High Sensitivity ◽  
Fluorescent Sensors ◽  
Cell Membrane Permeability ◽  
The Novel ◽  
Turn On ◽  
Low Cytotoxicity ◽  
Fluorescence Turn On ◽  
Oxygen Atoms

AbstractCompounds Rh6G-1 and RhB-2 with a novel receptor composed of tri-oxygen atoms of amide groups were designed and synthesized as new reversible fluorescent sensors for Fe3+. The prominent features of the novel sensor Rh6G-1 include a large fluorescence turn-on response in essentially pure water at room temperature, high sensitivity, high selectivity, a limit of detection, cell membrane permeability, and low cytotoxicity. These desirable attributes enable us to successfully employ the new sensor Rh6G-1 for Fe3+ bioimaging in living cells.

scholarly journals Highly Sensitive and Selective Fluorescence “Turn-On” Detection of Pb (II) Based on Fe3O4@Au–FITC Nanocomposite

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3180
Author(s):  
Yina Cai ◽  
Binxue Ren ◽  
Chifang Peng ◽  
Cunzheng Zhang ◽  
Xinlin Wei
Keyword(s):  
Detection Limit ◽  
Lake Water ◽  
Fluorescent Detection ◽  
Fluorescence Recovery ◽  
Turn On ◽  
Fluorescent Method ◽  
Lake Water Sample ◽  
Highly Sensitive ◽  
Fluorescence Turn On ◽  
Optimized Conditions

New nanocomposites, Fe3O4@Au–FITC, were prepared and explored to develop a fluorescent detection of Pb2+. The Fe3O4@AuNPs–FITC nanocomposites could be etched by Pb2+ in the presence of Na2S2O3, leading to fluorescence recovery of FITC quenched by Fe3O4@Au nanocomposites. With the increase of Pb2+ concentration, the fluorescence recovery of Fe3O4@AuNPs–FITC increased gradually. Under optimized conditions, a detection limit of 5.2 nmol/L of Pb2+ with a linear range of 0.02–2.0 µmol/L were obtained. The assay demonstrated negligible response to common metal ions. Recoveries of 98.2–106.4% were obtained when this fluorescent method was applied in detecting Pb2+ spiked in a lake-water sample. The above results demonstrated the high potential of ion-induced nanomaterial etching in developing robust fluorescent assays.

Optical explosives detection: from color changes to fluorescence turn-on

2009 ◽  
Vol 38 (9) ◽  
pp. 2543 ◽  
Author(s):  
Meaghan E. Germain ◽  
Michael J. Knapp
Keyword(s):  
Explosives Detection ◽  
Color Changes ◽  
Turn On ◽  
Fluorescence Turn On

scholarly journals A turn-on fluorescent chemosensor based on acylhydrazone for sensing of Mg2+ with a low detection limit

RSC Advances ◽  
2017 ◽  
Vol 7 (47) ◽  
pp. 29697-29701 ◽  
Author(s):  
Jing-Han Hu ◽  
Jian-Bin Li ◽  
You Sun ◽  
Peng-Xiang Pei ◽  
Jing Qi
Keyword(s):  
Detection Limit ◽  
Fluorescent Chemosensor ◽  
Turn On ◽  
Low Detection Limit ◽  
Fluorescence Turn On

A novel highly selective chemosensor for Mg2+ ions based on the naphthalene group as the fluorophore has been designed and synthesized, which shows a fluorescence turn-on response from colorless to green for Mg2+ ions in DMSO–H2O solutions.

Label-free and real-time monitoring of trypsin activity in living cells by quantum-dot-based fluorescent sensors

2014 ◽  
Vol 6 (8) ◽  
pp. 2499-2505 ◽  
Author(s):  
Wenzhu Zhang ◽  
Ping Zhang ◽  
Shengzhou Zhang ◽  
Changqing Zhu
Keyword(s):  
Quantum Dot ◽  
Real Time ◽  
Living Cells ◽  
Fluorescent Sensors ◽  
Label Free ◽  
Trypsin Activity ◽  
Real Time Monitoring ◽  
Turn On ◽  
Fluorescence Turn On

A quantum-dot-based fluorescence turn-on sensor was used for label-free and real-time monitoring of trypsin activity.

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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