scholarly journals Methyl-3-(2-hidroxy-5-nitrophenyl amino)-3-phenylpropanoate Based Colorimetric Sensor for Oxyanions

2020 ◽  
Vol 20 (2) ◽  
pp. 257
Author(s):  
Venty Suryanti ◽  
Fajar Rakhman Wibowo ◽  
Sekar Handayani
Keyword(s):  
Absorption Spectroscopy ◽  
Binding Sites ◽  
Color Change ◽  
Colorimetric Sensor ◽  
Anion Sensor ◽  
Anion Sensing ◽  
Naked Eye ◽  
Colorimetric Chemosensor ◽  
Light Yellow

A colorimetric anion sensor of methyl-3-(2-hydroxy-5-nitrophenyl amino)-3-phenylpropanoate bearing –OH and –NH groups as binding sites and nitrophenyl as a signaling unit, has been successfully accomplished. The compound functioned as a colorimetric chemosensor for H2PO4– and AcO–, in particular, the sensor showed significant naked-eye detectable color change from colorless to light yellow. In contrast, no color change was detected upon addition of other anions such as SO42–, NO3–, and CIO4–. The anion sensing ability of the sensor was further investigated by UV-Vis absorption spectroscopy in acetone. Characteristic UV-Vis spectra changes were revealed upon addition of H2PO4– and AcO–.

Fluoride anion sensing using colorimetric reagents containing binaphthyl moiety and urea binding site

2009 ◽  
Vol 63 (6) ◽  
Author(s):  
Roman Mikláš ◽  
Peter Kasák ◽  
Ferdinand Devínsky ◽  
Martin Putala
Keyword(s):  
Color Change ◽  
Colorimetric Detection ◽  
Fluoride Anion ◽  
Urea Derivatives ◽  
Anion Sensing ◽  
Naked Eye ◽  
Spectral Changes ◽  
Light Yellow ◽  
Nmr Data ◽  
Sensor Molecules

AbstractFour 1,1′-binaphthalene based bis-urea derivatives bearing aryl groups at end-on nitrogen atoms IIIa–d were synthesized as potential sensor molecules. These receptors show characteristic UV-VIS spectral changes on complexation with anions and they exhibit selective recognition of F− over other halide anions. Interaction of a fluoride anion with urea NH groups was confirmed by 1H NMR data. The presence of an electron-withdrawing nitro group in N′-aryls (receptors IIIa and IIIb) appeared to be necessary for naked-eye colorimetric detection. These receptors show dramatic color change from light-yellow to orange (IIIa) or to orange-red (IIIb) in the presence of guest fluoride anions already at concentrations of 10−5 mol dm−3 of the receptor and host.

Chromogenic naked-eye detection of copper ion and fluoride

RSC Advances ◽  
2015 ◽  
Vol 5 (105) ◽  
pp. 86463-86472 ◽  
Author(s):  
Ye Won Choi ◽  
Jae Jun Lee ◽  
Ga Rim You ◽  
Sun Young Lee ◽  
Cheal Kim
Keyword(s):  
Color Change ◽  
Copper Ion ◽  
Eye Detection ◽  
Naked Eye ◽  
Colorimetric Chemosensor ◽  
Naked Eye Detection

Colorimetric chemosensor was reported for detection of Cu2+ and F−via the color change from colorless to yellow and to orange.

Colorimetric anion sensor based on receptor having indole- and thiourea-binding sites

RSC Advances ◽  
2014 ◽  
Vol 4 (39) ◽  
pp. 20592-20598 ◽  
Author(s):  
M. G. Murali ◽  
K. A. Vishnumurthy ◽  
Sindhu Seethamraju ◽  
Praveen C. Ramamurthy
Keyword(s):  
Binding Sites ◽  
Colorimetric Sensor ◽  
Anion Sensor

A new colorimetric sensor having nitro-substituted indole and bisthiocarbonohydrazone units for selective fluoride and acetate ions has been designed and synthesized.

Effect of Nitro Group on Imidazole Derivative as Colorimetric Chemosensor for Amines

2020 ◽  
Vol 840 ◽  
pp. 385-391
Author(s):  
Trisno Afandi ◽  
Bambang Purwono ◽  
Winarto Haryadi
Keyword(s):  
Detection Limit ◽  
Nitro Group ◽  
Ammonium Acetate ◽  
Color Change ◽  
Imidazole Derivative ◽  
Naked Eye ◽  
Colorimetric Chemosensor ◽  
Light Orange

Chemosensor of imidazole derivative (4-(4,5-diphenyl-1H-imidazol-2-yl)-2-methoxy-6-nitrophenol) (IMD-1) has been synthesized and tested for amines sensor. IMD-1 was synthesized from the reaction of 5-nitrovanillin, 1,2-diphenylethane-1,2-dione (benzil), and ammonium acetate using reflux method. IMD-1 showed fast respond and color change from light orange to orange in naked eye compared with the imidazole derivative without nitro group (IMD-0). The IMD-1 could detect butylamine quantitatively with detection limit of 1.03 x 10-4 M.

Non-enzymatic colorimetric sensor strip based on melamine-functionalized gold nanoparticles assembled on polyamide nanofiber membranes for the detection of metronidazole

2019 ◽  
Vol 11 (29) ◽  
pp. 3706-3713 ◽  
Author(s):  
Mohammed Awad Abedalwafa ◽  
Yan Li ◽  
Chunfang Ni ◽  
Gang Yang ◽  
Lu Wang
Keyword(s):  
Gold Nanoparticles ◽  
Color Change ◽  
High Sensitivity ◽  
Colorimetric Sensor ◽  
Eye Detection ◽  
Naked Eye ◽  
Functionalized Gold Nanoparticles ◽  
Sensitivity And Selectivity ◽  
Nanofiber Membranes ◽  
Naked Eye Detection

Non-enzymatic colorimetric sensor strip for detection of metronidazole (MTZ) was designed and constructed, with high sensitivity and selectivity. Which can be used for naked-eye detection of MTZ with a visible color change from pink to purple.

Synthesis of 5-nitrovanillin in low temperature as cyanide anion sensor

2021 ◽  
Vol 4 (1) ◽  
pp. 104
Author(s):  
R Rahmawati ◽  
Syarifa Wahidah Al Idrus ◽  
Supriadi Supriadi ◽  
Lalu Sulman
Keyword(s):  
Molecular Structure ◽  
Nitric Acid ◽  
Low Temperature ◽  
Low Temperatures ◽  
Color Change ◽  
Anion Recognition ◽  
Electron Delocalization ◽  
Anion Sensor ◽  
Cyanide Anion ◽  
Colorimetric Chemosensor

In the synthesis of the organic sensor, the molecular structure will affect the ability of a compound to be used as a colorimetric chemosensor. Here, we present a simple synthesis technique for 5-nitrovanillin. It has been successfully synthesized using nitric acid as a source of nitro groups. Dichloromethane DCM was used as a solvent, and the synthesis was carried out at low temperatures (under 5°C). The method produces a good yield. The nitro group attached to the structure of the chemosensor plays a role in prolonging the electron delocalization. Its effect is in the process of anion recognition by the chemosensor. The formation of a sensor-analyte complex between the chemosensor and anion produces a color change in the solution.

Colorimetric Anion Sensing and Color Imaging Based on Catalyzed Deprotection in a New Azonaphthol Chromophore

2006 ◽  
Vol 6 (11) ◽  
pp. 3551-3554
Author(s):  
Moon Soo Choi ◽  
Il Hoon Cho ◽  
Won Seok Lyoo ◽  
Taek Seung Lee
Keyword(s):  
Absorption Spectrum ◽  
Color Change ◽  
Hydroxyl Group ◽  
Color Imaging ◽  
Anion Sensing ◽  
Eye Color ◽  
Naked Eye

We synthesized an ortho-phenylazonaphthol compound of which hydroxyl group was protected by a thermo-labile tert-butoxycarbonyl (t-Boc) group, in which hydroxyazo- and hydrazone-tautomerism could be blocked. The chromophore obtained by protection with t-Boc group was exclusively present as a hydroxyazo tautomer and exhibited blue-shifted absorption spectrum compared to their parent azohydrazone tautomerizing chromophore. With this compound, we performed colorimetric anion sensing based on the deprotection-induced possible azohydrazone formation in dye chromophore subsequently resulting in naked-eye color change. Besides, the t-Boc protected chromophore could be used as a color imaging material via thermolysis of thermo-labile t-Boc groups resulting in formation of azohydrazone form with red shifted absorption.

A naked-eye colorimetric sensor based on chalcone for sequential recognition of copper (II) and sulfide in semi-aqueous solution: Spectroscopic and Theoretical approaches

2021 ◽  
Author(s):  
Nidhi Singh ◽  
Ramesh Chandra
Keyword(s):  
Aqueous Solution ◽  
Colorimetric Sensor ◽  
Naked Eye ◽  
Colorimetric Chemosensor ◽  
Theoretical Approaches ◽  
Sequential Recognition

In this study, a simple colorimetric chemosensor based on the chalcone scaffold has been employed for sequential recognition of Cu2+ and S2- ion in a semi-aqueous solution. The chemosensor A01...

Efficacy of Silver Nanoparticles Synthesized from Hymenocallis species (Spider Lilly) Leaf Extract as Antimicrobial Agents

2019 ◽  
Vol 12 (5) ◽  
pp. 4644-4647
Author(s):  
K.K. Gupta ◽  
Neha Kumari ◽  
Neha Sinha ◽  
Akruti Gupta
Keyword(s):  
Silver Nanoparticles ◽  
Leaf Extract ◽  
Antimicrobial Agents ◽  
Color Change ◽  
Bacterial Species ◽  
Antimicrobial Property ◽  
Biogenic Synthesis ◽  
E Coli ◽  
Light Yellow ◽  
Antibiotic Property

Biogenic synthesis of silver nanoparticles synthesized from Hymenocallis species (Spider Lilly) leaf extract was subjected for investigation of its antimicrobial property against four bacterial species (E. coli, Salmonella sp., Streptococcus sp. & Staphylococcus sp.). The results revealed that synthesized nanoparticles solution very much justify the color change property from initial light yellow to final reddish brown during the synthesis producing a characteristics absorption peak in the range of 434-466 nm. As antimicrobial agents, their efficacy was evaluated by analysis of variance in between the species and among the different concentration of AgNPs solution, which clearly showed that there was significant variation in the antibiotic property between the four different concentrations of AgNPs solution and also among four different species of bacteria taken under studies. However, silver nanoparticles solution of 1: 9 and 1:4 were proved comparatively more efficient as antimicrobial agents against four species of bacteria.

A colorimetric sensor for detecting thiourea based on inhibiting peroxidase-like activity of gold–platinum nanoparticles

2021 ◽  
Author(s):  
Yuqi Zhao ◽  
Qingjie Fu ◽  
Xiaoqian Cui ◽  
Hui Chi ◽  
Yongzhuang Lu ◽  
...  
Keyword(s):  
Platinum Nanoparticles ◽  
Color Change ◽  
Colorimetric Sensor ◽  
Gold Platinum

The sensor is based on the peroxidase-like activity of Au@PtNPs. Thiourea can quickly be detected by the color change of the solution. The method was applied to the determination of thiourea in practical samples.

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