scholarly journals Anthracene coupled adenine for the selective sensing of copper ions

2010 ◽  
Vol 6 ◽  
Author(s):  
Kumaresh Ghosh ◽  
Tanushree Sen
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Copper Ions ◽  
The Other ◽  
Ion Recognition ◽  
Experimental Conditions

Anthracene-based adenines 1 and 2 have been designed and synthesized, and their metal ion recognition properties have been established fluorometrically. Both molecules exhibit Cu2+ induced ON-OFF type signaling patterns over the other representative metal ions studied. Compound 1 exhibits 97% quenching of emission in the presence of Cu2+ whilst derivative 2 shows 81% quenching under similar experimental conditions.

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.

scholarly journals Excitation-Energy Transfer Paths from Tryptophans to Coordinated Copper Ions in Engineered Azurins: a Source of Observables for Monitoring Protein Structural Changes

2016 ◽  
Vol 230 (9) ◽  
Author(s):  
Giulia Di Rocco ◽  
Fabrizio Bernini ◽  
Marco Borsari ◽  
Ilaria Martinelli ◽  
Carlo Augusto Bortolotti ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Metal Ions ◽  
Recombinant Proteins ◽  
Metal Ion ◽  
Structural Changes ◽  
Copper Ions ◽  
Excitation Energy Transfer ◽  
Ion Binding ◽  
Metal Ion Binding

AbstractThe intrinsic fluorescence of recombinant proteins offers a powerful tool to detect and characterize structural changes induced by chemical or biological stimuli. We show that metal-ion binding to a hexahistidine tail can significantly broaden the range of such structurally sensitive fluorescence observables. Bipositive metal-ions as Cu

scholarly journals Highly Selective Copper Ion Imprinted Clay/Polymer Nanocomposites Prepared by Visible Light Initiated Radical Photopolymerization

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 286 ◽  
Author(s):  
Radhia Msaadi ◽  
Gorkem Yilmaz ◽  
Andrit Allushi ◽  
Sena Hamadi ◽  
Salah Ammar ◽  
...  
Keyword(s):  
Visible Light ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Polymer Nanocomposites ◽  
Metal Ion ◽  
Copper Ions ◽  
Maximum Adsorption Capacity ◽  
Imprinted Polymer ◽  
Ion Imprinted ◽  
Ion Imprinting

There is an urgent demand worldwide for the development of highly selective adsorbents and sensors of heavy metal ions and other organic pollutants. Within these environmental and public health frameworks, we are combining the salient features of clays and chelatant polymers to design selective metal ion adsorbents. Towards this end, the ion imprinting approach has been used to develop a novel nanohybrid material for the selective separation of Cu2+ ions in an aqueous solution. The Cu2+-imprinted polymer/montmorillonite (IIP/Mt) and non-imprinted polymer/montmorillonite (NIP/Mt) nanocomposites were prepared by a radical photopolymerization process in visible light. The ion imprinting step was indeed important as the recognition of copper ions by IIP/Mt was significantly superior to that of NIP/Mt, i.e., the reference nanocomposite synthesized in the same way but in the absence of Cu2+ ions. The adsorption process as batch study was investigated under the experimental condition affecting same parameters such as contact time, concentration of metal ions, and pH. The adsorption capacity of Cu2+ ions is maximized at pH 5. Removal of Cu2+ ion achieved equilibrium within 15 min; the results obtained were found to be fitted by the pseudo-second-order kinetics model. The equilibrium process was well described by the Langmuir isothermal model and the maximum adsorption capacity was found to be 23.6 mg/g. This is the first report on the design of imprinted polymer nanocomposites using Type II radical initiators under visible light in the presence of clay intercalated with hydrogen donor diazonium. The method is original, simple and efficient; it opens up new horizons in the general domain of clay/polymer nanocomposites.

Effect of Metal Ions (Trivalent Chromium Ion and Copper Ion) on Light-Degradation of Silk Fabric

2011 ◽  
Vol 175-176 ◽  
pp. 209-213
Author(s):  
Hao Wang ◽  
Chen Huang
Keyword(s):  
Metal Ions ◽  
Exposure Time ◽  
Metal Ion ◽  
Breaking Strength ◽  
Copper Ions ◽  
Light Exposure ◽  
Sulfate Solution ◽  
Silk Fabric ◽  
Light Conditions ◽  
Copper Sulfate Solution

It was studied that metal ions affected light-degradation of silk fabric in this paper. The contrast of the weight and the tensile properties of silk fabric treated without or with different concentrations of metal ions (copper sulfate solution and chromium sulfate solution) by different time of light conditions were carried out. The results showed that after the treatment of silk with metal ions solution, the weight gain of the silk fabric increased with increasing the concentration of metal ions solution. There were different changes in the breaking strength of silk fabric treated with different metal ions when subjected to light exposure. In the same light conditions, comparing with the fabric without treatment, the breaking strength of the fabric with copper (ii) ions treatment increased while the breaking strength of the fabric with chromium (iii) ions treatment obviously decreased. Besides, fabric samples with copper ions treatment slowed down the decreasing rate of the breaking strength and fabric samples with chromium ions treatment accelerated the decreasing rate with increasing light exposure time. The results indicated copper (ii) ions had an inhibitory effect on light-degradation of silk fabric, and chromium (iii) ions enhanced light-degradation of silk fabric. Meanwhile, their respective function for fabric increased along with the increment of adsorption values of metal ions on silk fabrics. When being treated with the same concentration of metal ion solution, weight loss of the silk fabric improved and the breaking strength of the fabric decreased with increasing light exposure time, and the two had linear relationship.

scholarly journals New Polymerizable Tetraaza Macrocycle Containing Two Acridine Units for Selective Fluorescence Sensing of Metal Ions

2021 ◽  
Author(s):  
Ádám Golcs ◽  
Korinna Kovács ◽  
Panna Vezse ◽  
Péter Huszthy ◽  
Tünde Tóth
Keyword(s):  
Metal Ions ◽  
Biological Samples ◽  
Metal Ion ◽  
Tetraaza Macrocycle ◽  
Fluorescence Sensing ◽  
Ion Recognition ◽  
Thermodynamic Constants ◽  
Recognition Ability ◽  
Immobilized Ionophores

AbstractA new fluorescent bis(acridino)-macrocycle containing two allyl groups was synthesized and photophysically studied. Studies were carried out on metal ion recognition and selectivity-influencing effects including the determination of the relevant thermodynamic constants as logK and pKa. The proposed sensor molecule is recommended for the development of Zn2+-selective optochemical analyzers based on covalently immobilized ionophores as it has a unique pH-independent metal ion recognition ability, which is not influenced by anions and other potentially occurring metal ions in biological samples.

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