Tunable Photochromism of Spirobenzopyran via Selective Metal Ion Coordination:  An Efficient Visual and Ratioing Fluorescent Probe for Divalent Copper Ion

2008 ◽  
Vol 80 (9) ◽  
pp. 3466-3475 ◽  
Author(s):  
Na Shao ◽  
Jian Yu Jin ◽  
Hao Wang ◽  
Ying Zhang ◽  
Rong Hua Yang ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Metal Ion ◽  
Copper Ion ◽  
Divalent Copper

scholarly journals Copper Ion Detection Method Based on a Quantum Dot Fluorescent Probe

2021 ◽  
Author(s):  
Pu YANG ◽  
Feng DONG ◽  
Yaguang YU ◽  
Jiahui SHI ◽  
Ming SUN
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Fluorescence Quenching ◽  
Linear Relationship ◽  
Fluorescent Probe ◽  
Metal Ion ◽  
Copper Ion ◽  
Quantitative Detection ◽  
Correction Coefficient ◽  
Modeling And Analysis

The heavy metal ion Cu2+ was used as the research object in this study. Cu2+ was detected using a cysteine- and glutathione-modified cadmium telluride quantum dot solution. Compounds of Cu2+ and modified quantum dots on the surface caused the fluorescence quenching of quantum dots. A linear relationship existed between the concentration and the intensity of the change in fluorescence quenching. Using this linear relationship, the quantitative detection of the Cu2+ content in the solution by quantum dots was achieved; the detection band was 476-800 nm. Under optimized conditions, the detection limit of the method was 3.58×10-5 mol/L (S/N=3, n=11), and the linear range was 3×10-7 to 8×10-4 mol/L. In a certain experimental environment, standard normal variate preprocessing of the characteristic band and partial least squares modeling and analysis yielded good self-prediction and actual prediction abilities. The correction coefficient was 0.9006. The RMSEC was 8.83084 µmol/L, the determination coefficient of the validation set was 0.8686, and the RMSEP was 5.4320 µmol/L. The results showed that the modeling effect was good in the experiment, the operation was simple and convenient, and the experiment was fast, reliable, and nonpolluting, indicating that the method of detecting Cu2+ using a quantum dot fluorescent probe was feasible.

Development of a New 4-Amino-1,8-Naphthalimide Derivative as a Fluorescent Probe for Monitoring the Divalent Copper Ion

2018 ◽  
Vol 85 (4) ◽  
pp. 665-672 ◽  
Author(s):  
Kesheng Shen ◽  
Shanshan Mao ◽  
Xinkui Shi ◽  
Stephen Opeyemi Aderinto ◽  
Yuling Xu ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Copper Ion ◽  
Divalent Copper

Electrochemical reduction of indigo by combination of sodium borohydride and copper salt

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Xiaoyan Li ◽  
MengQian Wang ◽  
Gang Wu ◽  
Jiming Yao
Keyword(s):  
Sodium Borohydride ◽  
Room Temperature ◽  
Reduction Potential ◽  
Copper Ion ◽  
Reduction Process ◽  
Divalent Copper ◽  
Content Type ◽  
Copper Sulfate Pentahydrate ◽  
Electrochemical Technology ◽  
Dyed Fabric

Purpose The purpose of this study is to improve the performance of sodium borohydride in reducing indigo at room temperature, the divalent copper ion complex was combined with electrochemical technology for the reduction of indigo by sodium borohydride. Design/methodology/approach According to the K/S value of the dyed cloth sample, find a more suitable ligand for the copper ion in the catholyte. Response surface analysis tests were performed to evaluate the effects of sodium borohydride concentration, sodium hydroxide concentration and copper sulfate pentahydrate concentration on the reduction potential of the dye solution and the K/S value of the dyed fabric samples. Findings Sodium gluconate was found to be a more suitable ligand for copper ions in catholyte. The effects of NaOH concentration as well as the interaction of NaBH4 and NaOH on the reduction potential of the catholyte and the K/S value of the dyed fabric samples were extremely significant. The optimal concentrations of NaBH4, NaOH and CuSO4•5H2O were 0.5, 2.5 and 0.65 g/L. In the case of the optimized condition, the absolute value of the reduction potential was 968, and the K/S value was 11.92, which is comparable with that of the conventional reduction process with sodium dithionite. Originality/value The divalent copper ion complex combined with electrochemical technology was applied in the process of reducing indigo with NaBH4 at room temperature.

scholarly journals Hg2+ and Cd2+ binding of a bioinspired hexapeptide with two cysteine units constructed as a minimalistic metal ion sensing fluorescent probe

2019 ◽  
Vol 48 (23) ◽  
pp. 8327-8339 ◽  
Author(s):  
Levente I. Szekeres ◽  
Sára Bálint ◽  
Gábor Galbács ◽  
Ildikó Kálomista ◽  
Tamás Kiss ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Metal Ion ◽  
Cysteine Residues ◽  
Ion Sensing ◽  
Metal Ion Sensing

Efficient and selective Hg2+ binding of a hexapeptide containing two cysteine residues is demonstrated both in solution and immobilized forms.

scholarly journals Selective Removal of Toxic Metals like Copper and Arsenic from Drinking Water Using Phenol-Formaldehyde Type Chelating Resins

2009 ◽  
Vol 6 (4) ◽  
pp. 1035-1046 ◽  
Author(s):  
Debasis Mohanty ◽  
Shashadhar Samal
Keyword(s):  
Drinking Water ◽  
Schiff Bases ◽  
Toxic Metals ◽  
Metal Ion ◽  
Phenol Formaldehyde ◽  
Low Cost ◽  
Arsenic Concentration ◽  
Copper Ion ◽  
Toxic Metal ◽  
Chelating Resins

The concentration of different toxic metals has increased beyond environmentally and ecologically permissible levels due to the increase in industrial activity. More than 100 million people of Bangladesh and West Bengal in India are affected by drinking ground water contaminated with arsenic and some parts of India is also affected by poisoning effect of copper, cadmium and fluoride. Different methods have been evolved to reduce the arsenic concentration in drinking water to a maximum permissible level of 10 μg/L where as various methods are also available to separate copper from drinking water. Of the proven methods available today, removal of arsenic by polymeric ion exchangers has been most effective. While chelating ion exchange resins having specific chelating groups attached to a polymer have found extensive use in sorption and pre concentration of Cu2+ions. Both the methods are coupled here to separate and preconcentrate toxic metal cation Cu2+and metal anion arsenate(AsO4–) at the same time. We have prepared a series of low-cost polymeric resins, which are very efficient in removing copper ion from drinking water and after coordinating with copper ion they act as polymeric ligand exchanger, which are efficiently removing arsenate from drinking water. For this purpose Schiff bases were prepared by condensingo-phenylenediamine witho-,m-, andp-hydroxybenzaldehydes. Condensing these phenolic Schiff bases with formaldehyde afforded the chelating resins in high yields. These resins are loaded with Cu2+, Ni2+2+, and Fe3+ions. The resins and the polychelates are highly insoluble in water. In powdered form the metal ion-loaded resins are found to very efficiently remove arsenate ion from water at neutral pH. Resins loaded with optimum amount of Cu2+ion is more effective in removing arsenate ions compared to those with Fe3+ion, apparently because Cu2+is a stronger Lewis acid than Fe3+. Various parameters influencing the removal of the arsenate ion from drinking water to a concentration level below 20 μg/L are studied.

Adsorption of Thallium(I), Lead(II), Copper(II), Bismuth(III) and Chromium(III) by Electrolytic Manganese Dioxide

1996 ◽  
Vol 13 (4) ◽  
pp. 231-240 ◽  
Author(s):  
Madhav P. Dahal ◽  
Geoffrey A. Lawrance
Keyword(s):  
Manganese Dioxide ◽  
Metal Ion ◽  
Copper Ion ◽  
Dominant Factor ◽  
Electrolytic Manganese Dioxide ◽  
Significant Drop ◽  
Metal Ion Adsorption ◽  
Electrolytic Manganese ◽  
Wide Range ◽  
Prolonged Heat

The adsorption of thallium(I), lead(II), copper(II), bismuth(III) and chromium(III) by electrolytic manganese dioxide (EMD) has been followed between pH 2–5 [except for bismuth(III)), where a single pH of 1.5 was employed] at 20°C and an ionic strength of 0.5, employing a wide range of initial metal ion concentrations from 5 × 10−5 mol/dm3 to 5 × 10−2 mol/dm3. The adsorption isotherms all fitted a simple Langmuir adsorption equation quite well. The amount of metal ion adsorbed increased with pH for lead and copper ion. However, for both thallium and chromium, a significant drop in adsorption between pH 3 and 4 was observed, associated with the dominant presence of lower-charged hydroxy species at higher pH values. At pH 4, adsorption was in the order PbII > CuII > TII >> CrIII, whereas at pH ≤ 2 the order was BiIII ≤ PbII > TlI > CrIII > CuII. In the low pH range, which is largely free of hydrolysis species, the adsorption of the isoelectronic bismuth, lead and thallium series appears to be dominated by charge, and charge appears a dominant factor with the transition metal pair also. The adsorption of lead (at pH 4 and 5) and bismuth (at pH 1.5) to samples of EMD subjected to prolonged heat treatment at 110, 400 and 650°C were also examined. Samples dried at 110°C mainly lost only surface water, and showed adsorption characteristics similar to untreated samples. Samples heated at 400°C lost all their combined water but still showed significant adsorption, whereas samples heated at 600°C were converted to Mn2O3, and showed very small though measurable metal ion adsorption.

Evaluation of metal ion sensing behaviour of fluorescent probe along with its precursors: PET-CHEF mechanism, molecular logic gate behaviour and DFT studies

2019 ◽  
Vol 95 (1-2) ◽  
pp. 79-89 ◽  
Author(s):  
Chitra Varadaraju ◽  
Mosae Selvakumar Paulraj ◽  
G. Tamilselvan ◽  
I. V. Muthu Vijayan Enoch ◽  
V. Srinivasadesikan ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Metal Ion ◽  
Logic Gate ◽  
Dft Studies ◽  
Molecular Logic Gate ◽  
Ion Sensing ◽  
Molecular Logic ◽  
Metal Ion Sensing

A novel fluorescent probe based on biphenyl and rhodamine for multi-metal ion recognition and its application

2018 ◽  
Vol 47 (10) ◽  
pp. 3378-3387 ◽  
Author(s):  
Xu Tang ◽  
Yun Wang ◽  
Juan Han ◽  
Liang Ni ◽  
Huiqin Zhang ◽  
...  
Keyword(s):  
Metal Ions ◽  
Fluorescent Probe ◽  
Metal Ion ◽  
Ion Recognition

A novel fluorescent probe for the detection of multi metal ions was designed and synthesized based on the fluorophores of biphenyl and rhodamine.

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