l-Cysteine-Modified Gold Nanostars for SERS-Based Copper Ions Detection in Aqueous Media

Langmuir ◽  
2014 ◽  
Vol 30 (44) ◽  
pp. 13491-13497 ◽  
Author(s):  
Pancras Ndokoye ◽  
Jun Ke ◽  
Jie Liu ◽  
Qidong Zhao ◽  
Xinyong Li
Keyword(s):  
Copper Ions ◽  
Aqueous Media ◽  
Gold Nanostars

A colorimetric and fluorescent chemosensor for copper ions in aqueous media and its application in living cells

2010 ◽  
Vol 34 (7) ◽  
pp. 1239 ◽  
Author(s):  
Huan-Huan Wang ◽  
Lin Xue ◽  
Zhang-Jian Fang ◽  
Guo-Ping Li ◽  
Hua Jiang
Keyword(s):  
Copper Ions ◽  
Aqueous Media ◽  
Living Cells ◽  
Fluorescent Chemosensor

Real-Time Probe for the Efficient Sensing of Inorganic Fluoride and Copper Ions in Aqueous Media

2018 ◽  
Vol 3 (41) ◽  
pp. 11593-11600 ◽  
Author(s):  
Pravin Patil ◽  
Kanalli V. Ajeya ◽  
Mahesh P. Bhat ◽  
Ganesan Sriram ◽  
Jingxian Yu ◽  
...  
Keyword(s):  
Real Time ◽  
Copper Ions ◽  
Aqueous Media ◽  
Inorganic Fluoride

Simple quinoline-based “turn-on” fluorescent sensor for imaging copper (II) in living cells

2014 ◽  
Vol 92 (11) ◽  
pp. 1092-1097 ◽  
Author(s):  
Chen Zhou ◽  
Ning Xiao ◽  
Yapeng Li
Keyword(s):  
Density Functional ◽  
Copper Ions ◽  
Fluorescent Sensor ◽  
Aqueous Media ◽  
Density Functional Theory Calculations ◽  
Quinoline Derivative ◽  
Electron Transfer Mechanism ◽  
Organic Chromophores ◽  
Turn On ◽  
Fluorescence Turn On

In this work, a novel fluorescent sensor based on a quinoline derivative was designed and synthesized for detecting copper ions in a near-aqueous media. According to its extra-nuclear structure, copper (II) normally exhibits effectiveness for quenching the singlet excited state of organic chromophores through a fast electron transfer mechanism. However, this molecule displayed a strong fluorescence “turn-on” phenomenon upon addition of Cu2+, which was rarely reported in previous research. In addition, density functional theory calculations were adopted to investigate the molecular orbitals as well as the spatial structure. Furthermore, this sensor was applied into living SGC-7901 cells to extend its application in biological systems.

scholarly journals Contribution of copper binding to the inhibition of lipid oxidation by plasmalogen phospholipids

1999 ◽  
Vol 340 (2) ◽  
pp. 377-383 ◽  
Author(s):  
Daniela HAHNEL ◽  
Thomas HUBER ◽  
Volker KURZE ◽  
Klaus BEYER ◽  
Bernd ENGELMANN
Keyword(s):  
Lipid Oxidation ◽  
Copper Ions ◽  
Aqueous Media ◽  
Oxidative Degradation ◽  
Direct Interaction ◽  
Molar Ratio ◽  
Protective Effects ◽  
Copper Binding ◽  
Enol Ether

The role of plasmalogen phospholipids for copper-induced lipid oxidation was evaluated. Using 1H-NMR we observed that the copper (CuSO4)-promoted oxidative degradation of polyunsaturated fatty acids in micellar solution was dose-dependently attenuated by the plasmalogen lysoplasmenylethanolamine from bovine brain (lysoBP-PtdEtn). This was due to a direct interaction of copper ions with the plasmalogen-specific enol ether double bond. The enol ether methine 1H signal decreased on the addition of copper, saturation being reached at a molar ratio of lysoBP-PtdEtn to copper of 1:1. The original 1H signal was recovered almost completely after the addition of EDTA. Enrichment of micelles and low-density lipoproteins (LDLs) with plasmalogen phospholipids led to a decrease in the Cu(II) concentration in the aqueous media. After loading of LDLs in vitro with BP-PtdEtn, the LDL-dependent formation of Cu(I) was decreased, in particular in particles experimentally supplemented with α-tocopherol. The suppression of copper-promoted lipid oxidation that was observed in the presence of plasmalogen phospholipids plus α-tocopherol was greater than the sum of the protective effects elicited by the two substances alone. In conclusion, the formation of a complex between copper ions and the plasmalogens accounts partly for their inhibition of copper-induced lipid oxidation.

scholarly journals CHARACTERIZATION AND ADSORPTION PROPERTIES OF HYPERICUM PERFORATUM L. FOR THE REMOVAL OF Cu2+ IONS FROM AQUEOUS SOLUTIONS

2020 ◽  
Vol 54 (9-10) ◽  
pp. 1023-1030
Author(s):  
LIDIA IVANOVA ◽  
PAUNKA VASSILEVA ◽  
ALBENA DETCHEVA
Keyword(s):  
Aqueous Solutions ◽  
Hypericum Perforatum ◽  
Copper Ions ◽  
Aqueous Media ◽  
Nitrogen Adsorption ◽  
Isotherm Models ◽  
Maximum Adsorption Capacity ◽  
Material Particle ◽  
Hypericum Perforatum L

The objective of the present study is the characterization of an adsorbent plant material based on Hypericum perforatum L. and the investigation of its feasibility for the removal of Cu2+ ions from aqueous solutions. XRD, TGA, FTIR, SEM and low-temperature nitrogen adsorption were used for the analytical characterization of the material. Particle size distribution and slurry pH of the investigated material were also determined. The effect of contact time, solution acidity and initial metal concentration on the adsorption of Cu(II) ions was studied by means of the batch method. Desorption studies have also been performed. Equilibrium experimental data were fitted to the linear Langmuir, Freundlich and Dubinin-Radushkevich isotherm models. The maximum adsorption capacity was calculated and it was concluded that the material could be used as an effective biosorbent for the removal of copper ions from aqueous media.

scholarly journals Novel Metallochromic Hydrazone-Based Chemosensor Toward Colorimetric Paper Strip For Selective Detection Cu2+

2021 ◽  
Author(s):  
Walid Sharmoukh ◽  
Meram S. Abdelrahman ◽  
Shaban Elkhabiry ◽  
Tawfik Khattab
Keyword(s):  
Chemical Sensor ◽  
Copper Ions ◽  
Diazonium Salt ◽  
Aqueous Media ◽  
Total Content ◽  
Solvent Polarity ◽  
Paper Strip ◽  
Selective Detection ◽  
Synthesis Strategy ◽  
Ph Range

Abstract A solid-state sensor was developed for the determination of copper ions (Cu2+) in aqueous media using tricyanofuranhydrazone as a spectroscopic probe and a paper sheet as the hosting strip. A new tricyanofuranhydrazone-based colorimetric chemosensor (TCFH) was synthesized for selective detection of Cu2+ in aqueous environments. The synthesis strategy of TCFH involved an azo-coupling process between the diazonium salt of 8-aminoquinoline and an active methyl-bearing tricyanofuran (TCF) heterocyclic moiety. The molecular structure of the prepared TCFH chemical sensor was verified with FT-IR, 1H and 13C NMR, as well as elemental analysis. Due to intramolecular charge transfer, TCFH chromophore demonstrated pronounced solvatochromism depending on the solvent polarity. Changes in both color and UV-vis absorption spectra demonstrated by the developed chemosensor proved that TCFH can be utilized to detect Cu2+ in the presence of other competing metallic cations and anions. The synthesized TCFH probe, which contains a hydrazone recognition moiety, demonstrates dramatic solvatochromic activity and high selectivity at the microlevel of copper ions with a color shift from yellow to purple. Mechanisms accounting for both metallochromic and solvatochromic activities were explored. Moreover, test strips of TCFH were successfully developed and applied for the detection of copper ions at different concentrations in aqueous media. The colorimetric properties of the prepared TCFH-immobilized paper strips were investigated by CIE Lab chromogenic parameters, colorimetric strength (K/S) and UV-Vis absorbance spectra. The metallochromic paper strip exhibited a detection limit at the ppm range. The best detection of Cu2+ was achieved in the pH range of 6.6-7.4 demonstrating an immediate color switch from yellow to purple relying on the total content of Cu2+. Scanning electron microscopy (SEM) was applied to characterize the deposition of tricyanofuranhydrazone onto the surface of the paper strip.

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