2 edition of Crown ether based polymeric electrochemical sensor for strontium found in the catalog.
Crown ether based polymeric electrochemical sensor for strontium
|Statement||by G.H. Rizvi ... [et al.].|
|Series||BARC external ;, BARC/2002/E/008|
|Contributions||Rizvi, G. H., Bhabha Atomic Research Centre.|
|LC Classifications||Microfiche 2004/60254 (T)|
|The Physical Object|
|Pagination||ii, 10,  p.|
|Number of Pages||10|
|LC Control Number||2003306804|
MERCURY SELECTIVE ELECTROCHEMICAL SENSOR BASED ON DOUBLE ARMED CROWN ETHER Table I- Composition and response characteri stics of PVC based N,N' -dibenzyl-I tetraoxa diazacyc looctadecane (I) membranes selecti ve for Hg2+ ions Compositi on of membrane (wlw) DBBP DBP DOP TEP This is a significant improvement for the response slope and detection limit compared to SCEs with valinomycin, 2,3-naphthocrown-ether, and dibenzocrownether .
A new photoresponsive bis (crown ether) 1 was synthesized from carboxylic crown ethers and 4,4′ ‐ hydroxy azobenzene, and its ability for the extraction of alkali metal, alkaline earth metal. Synthesis of ion-selective polymer-supported crown ethers: A review Electrochemical sensors for metal ions can be prepared by modification of the CPE using conducting polymers functionalized.
We propose an electrochemical sensor based on applying two successive thin layers from a mixture of multiwalled carbon nanotubes‐ionic liquid crystal and crown ether at glassy carbon electrode surface (GC/(CNTs‐ILC)/Crown). The sensor was used for sensitive determination of neurotransmitters based on effective synergism between its by: Abstract. A new polystyrene based membrane electrode of methyl substituted 6,,dibenzo-2,4,9,tetraphenyl-1,5,8,tetraazacyclotetradeca-1,4,6,8,11,hexaene (I) with sodium tetraphenylborate (NaTPB) and dibutyl phthalate (DBP) as anion excluder and plasticizing agent was prepared and investigated as Hg (II)-selective electrode. The electrode exhibits a Nernstian response Cited by:
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Electrochemical Determination of Neurotransmitters at Crown Ether Modified Carbon Nanotube Composite: Application for Sub-Nano-Sensing of Serotonin in Human Serum. ElectroanalysisDOI: /elanCited by: Recent advances in the application of carbon nanotube and conducting polymer based composite materials are the design of electrochemical sensors for the determination of metal ions [, ].
Nafion (NF) is the most well-known ionomers (polymer containing ions) and is highly selective to by: 8. Crown ether modified poly (hydroquinone)/carbon nanotubes based electrochemical sensor for simultaneous determination of levodopa, uric acid, tyrosine and ascorbic acid in biological fluids - Author: Nada F.
Atta, Ahmed Galal, Asmaa R. El-Gohary. Up to now, more than potentiometric membrane sensors based on Schiff's bases and crown ethers have been reported for cations and anions. In this review cation binding and anion complexes have been described and liquid membrane sensors based on Schiff's bases and crown ethers were by: Cyclopolymers have potentially interesting molecular recognition properties due to their in-chain multiple rings.
Here, the authors report cation-templated, controlled radical cyclopolymerization Cited by: Nada F. Atta, Ahmed Galal, Yousef M. Ahmed, Highly Conductive Crown Ether/Ionic Liquid Crystal-Carbon Nanotubes Composite Based Electrochemical Sensor for Chiral Recognition of Tyrosine Enantiomers, Journal of The Electrochemical Society, /jes,8, Cited by: Highly sensitive and selective chloride liquid/polymeric membrane electrodes are described that employ mercuracarborand-3 (MC3), a neutral preorganized macrocyclic Lewis acid, as the anion carrier.
MC3-based chloride-sensitive membrane electrodes, doped with different mole percentages of cationic additives (5, 10, and 60 mol % tridodecylmethylammonium chloride) relative to the amount of the Cited by: Two redox-active crown ethers, (1,1‘- binaphthyl)crown-6 incorporating 9,anthraquinone (BNAQ) and 1,4-benzoquinone (BNBQ), were synthesized and employed in the selective binding of NH4+ over K+.
Their applications to NH4+ detection were studied Cited by: The macrocyclic ligand, crown-5, was used as an ionophore for fabrication of a polyvinyl chloride (PVC) based membrane sensor for Ag(I) cation. Optical sensors based on crown ether, valinomycin and Nile Blue as ionophore involve multistep synthesis before immobilization on to a polymeric base and pH dependent chromogenic activity poses some limitations in by: 6.
Polymeric crown ethers: LCST behavior in water and stimuli-responsiveness† Dechun Huang, a Qiao Zhang, b Yan Deng, b Zheng Luo, b Bo Li, c Xin Shen, c Zhenhui Qi, c Shengyi Dong, * b Yan Ge * c and Wei Chen * aCited by: 6. The system was quite active for the transport of Na +. Later on, the same group removed the crown ether macrocycle from the system and reported one of the earlier voltage gated ion channels [ 19 ].
George Gokel in published the first oligocrown ether (2, Fig. 1) [ 11 ].Author: Arsalan Ahmed, Muhammad Ali Hashmi, Khurshid Ayub. The n-type π-conjugated polymers with a 1,2,4-triazole ring substituted by a benzocrownether (benzo15C5) subunit at the 4-position of the 1,2,4-triazole ring were synthesized by organometallic polycondensations.
The UV−vis spectra of the polymers exhibited absorption maxima (λmax values) at a longer wavelength than that exhibited by 4-benzo15C,2,4-triazole (model-1), revealing.
From Wikipedia, the free encyclopedia. Jump to navigation Jump to search. crown-6 coordinating a potassium ion. Crown ethers are cyclic chemical compounds that consist of a ring containing several ether groups.
The most common crown ethers are cyclic oligomers of ethylene oxide, the repeating unit being ethyleneoxy, i.e., –CH 2 CH 2 O–. Recently, much attention has been paid to chromatographic characteristics and applications of crown ethers. These compounds were employed as chiral stationary phase for resolution of various racemic compounds in high performance chromatography and capillary electrochromatography techniques.
Crown ethers also used in gas chromatography as the stationary by: We synthesized ion pair receptors 1 and 2 consisting of a benzocrown ether cation binding site and a ferrocene-supported squaramide anion binding domain and compared their binding ability with anion receptor 3, lacking a crown ether unit, using spectroscopic, spectrophotometric, and electrochemical measurements in acetonitrile receptors were obtained in a modular fashion by.
Voltammetric and Amperometric Transduction for Solvent Polymeric Membrane Ion Sensors. Analytical Chemistry71 (17), DOI: /acx. Sunita Kumbhat, Urvasini Singh. A potassium-selective electrochemical sensor based on crown-ether functionalized self.
We propose an electrochemical sensor based on applying two successive thin layers from a mixture of multiwalled carbon nanotubes‐ionic liquid crystal and crown ether at glassy carbon electrode surface (GC/(CNTs‐ILC)/Crown). The sensor was used for sensitive determination of neurotransmitters based on effective synergism between its by: Conducting polymer based electrochemical sensor for strontium in nitric acid medium.
was employed as an electrochemical sensor for Sr-II ion in nitric acid medium. Behavior of the molecular device was studied as a function of variables like oxidation potential, crown ether concentration and nitric acid concentration.
crown ether. Besides these, crown ethers-based adsorbents for strontium separation was recently reported. An overview on adsorbents based on crown ethers or calixarenes for cesium removal will be meaningful, but it is still not yet comprehensive if without the consideration of Author: Jianlong Wang, Shuting Zhuang.
The crown ether molecule size, and hence cavity dimension, affects the types of metal ions which can most easily interact with the binding site (Maleknia & Brodbelt, ). Several studies have shown that sensors based on crown ethers can detect Na + concentrations wellCited by: 2.Crown Ether-Doped Sol−Gel Materials for Strontium(II) Separation Article in Analytical Chemistry 72(21) December with Reads How we measure 'reads'.Many research studies have been conducted on the use of conjugated polymers in the construction of chemical sensors including potentiometric, conductometric and amperometric sensors or biosensors over the last decade.
The induction of conductivity on conjugated polymers by treating them with suitable oxidizing agents won Heeger, MacDiarmid and Shirakawa the Nobel Prize in by: