scholarly journals A ‘turn-on’ fluorescent chemosensor for the detection of Zn2+ ion based on 2-(quinolin-2-yl)quinazolin-4(3H)-one

2018 ◽  
Vol 24 (3) ◽  
pp. 135-139 ◽  
Author(s):  
Xue-Jiao Bai ◽  
Jing Ren ◽  
Jia Zhou ◽  
Zhi-Bin Song
Keyword(s):  
Fluorescent Sensor ◽  
Binding Model ◽  
Dehydrogenation Reaction ◽  
Titration Experiment ◽  
Naked Eye ◽  
Turn On ◽  
Plot Analysis ◽  
Fluorescent Response ◽  
Uv Lamp ◽  
Tandem Cyclization

Abstract2-(Quinolin-2-yl)quinazolin-4(3H)-one (Q) was synthesized via the Brønsted acid-promoted tandem cyclization/dehydrogenation reaction with a good yield. Compound Q is a selective ‘turn-on’ fluorescent sensor for Zn2+ ion without interference by Cd2+. The 1:1 binding model of Q to Zn2+ was confirmed by the Benesi-Hildebrand analysis, Job’s plot analysis and a ultraviolet-visible (UV-Vis) titration experiment. Furthermore, the light-on fluorescent response can be observed by the naked eye under UV-lamp irradiation (365 nm).

A new on-fluorescent sensor for Ag+ based on benzimidazole bearing bis(ethoxycarbonylmethyl)amino groups

2015 ◽  
Vol 21 (4) ◽  
pp. 211-214 ◽  
Author(s):  
Bing Zhao ◽  
Yue Fang ◽  
Ming-jie Ma ◽  
Qi-Gang Deng ◽  
Yu Xu ◽  
...  
Keyword(s):  
Metal Ions ◽  
Visual Detection ◽  
Fluorescent Sensor ◽  
Amino Groups ◽  
Fluorescent Intensity ◽  
Naked Eye ◽  
Wide Range ◽  
Fluorescent Response ◽  
Sensitivity And Selectivity

AbstractA new fluorescent sensor based on a benzimidazole unit bearing bis(ethoxycarbonylmethyl)amino groups was designed and synthesized. The ligand exhibits strong sensitivity and selectivity for Ag+ by enhanced fluorescent intensity in the presence of a wide range of other tested metal ions in methanol. The colorimetric and fluorescent response to Ag+ can be conveniently detected even by the naked eye, which offers a facile method for visual detection of Ag+.

A novel fluorene based “turn on” fluorescent sensor for the determination of zinc and cadmium: experimental and theoretical studies along with live cell imaging

2016 ◽  
Vol 40 (11) ◽  
pp. 9593-9608 ◽  
Author(s):  
Sohini Basu Roy ◽  
Jesmin Mondal ◽  
Anisur Rahman Khuda-Bukhsh ◽  
Kajal Krishna Rajak
Keyword(s):  
Live Cell Imaging ◽  
Cell Imaging ◽  
Fluorescent Sensor ◽  
A549 Cells ◽  
Live Cell ◽  
Theoretical Studies ◽  
Naked Eye ◽  
Turn On ◽  
Experimental And Theoretical Studies

A new “naked-eye” colorimetric and fluorometric chemosensor HAFPA synthesized form both 1 : 1 and 1 : 2 complexes with Zn2+ and only 1 : 1 complex with Cd2+ which can detect intracellular Zn2+ and Cd2+ in A549 cells.

scholarly journals Switching-On Fluorescence by Copper (II) and Basic Anions: A Case Study with a Pyrene-Functionalized Squaramide

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1301
Author(s):  
Giacomo Picci ◽  
Jessica Milia ◽  
Maria Carla Aragoni ◽  
Massimiliano Arca ◽  
Simon J. Coles ◽  
...  
Keyword(s):  
Solid State ◽  
Copper Complex ◽  
Receptor Complex ◽  
Emission Properties ◽  
Naked Eye ◽  
Intense Emission ◽  
Uv Lamp

The new symmetric acyclic N,N’-bis(1-pyrenyl) squaramide (H2L) functionalized with the pyrene moiety as a fluorogenic fragment has been designed and its ability to selectively detect specific anions and metals investigated. H2L selectively binds Cl− both in solution (DMSO 0.5% H2O and MeCN) and in the solid state, and allows to selectively detect Cu2+ in MeCN with the formation of a 2:1 metal-receptor complex, with a green intense emission appreciable by naked eye under the UV lamp. The H2L copper complex preserves its emission properties in the presence of Cl−. The addition of basic anions (OH−, CN−, and F−) up to 10 equivalents caused the deprotonation of the squaramide NHs and a dramatic change of the emission properties of the H2L copper complex.

A Highly Selective Turn‐on Fluorescent and Naked‐eye Colourimetric Dual‐channel Probe for Cyanide Anions Detection in Water Samples

2021 ◽  
Author(s):  
Ya Wu ◽  
Wen-Min Ding ◽  
Juan Li ◽  
Geng Guo ◽  
Shu-Zhen Zhang ◽  
...  
Keyword(s):  
Water Samples ◽  
Naked Eye ◽  
Turn On ◽  
Dual Channel

Naked-Eye Detection of Hg(II) Ions by Visible Light-Induced Polymerization Initiated by a Hg(II)-Selective Photoredox Catalyst

2021 ◽  
Author(s):  
Hyungwook Kim ◽  
Young Jae Jung ◽  
Jungkyu K. Lee
Keyword(s):  
Visible Light ◽  
Signal Amplification ◽  
Eye Detection ◽  
Naked Eye ◽  
Turn On ◽  
Novel Strategy ◽  
Amplification Strategy ◽  
Naked Eye Detection

We developed a novel strategy for signal amplification strategy using a visible light-induced photopolymerization, initiated by a selective turn-on photoredox catalyst. As photoredox catalysts, fluorescein derivatives are able to initiate...

scholarly journals A single point mutation converts a proton-pumping rhodopsin into a red-shifted, turn-on fluorescent sensor for chloride

2021 ◽  
Author(s):  
Jasmine N. Tutol ◽  
Jessica Lee ◽  
Hsichuan Chi ◽  
Farah N. Faizuddin ◽  
Sameera S. Abeyrathna ◽  
...  
Keyword(s):  
Point Mutation ◽  
Fluorescent Sensor ◽  
Single Point ◽  
Proton Pumping ◽  
Single Point Mutation ◽  
Turn On ◽  
Gloeobacter Violaceus

By utilizing laboratory-guided evolution, we have converted the fluorescent proton-pumping rhodopsin GR from Gloeobacter violaceus into GR1, a red-shifted, turn-on fluorescent sensor for chloride.

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