Results 141 to 150 of about 22,563,925 (190)
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Slow Solvation Dynamics of a Water–Nitrobenzene System
Accounts of Chemical Research, 2007Very slow changes in solvation taking place in water-saturated nitrobenzene have been observed and studied by nuclear magnetic resonance (NMR), Fourier transform infrared, and inelastic neutron scattering spectroscopy. These changes are most likely caused by the rearrangement of the hydrogen-bonded water network.
Greg, Moakes, Jiri, Janata
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Applications of the dicarbollylcobaltate(III) anion in the water/nitrobenzene extraction system
Talanta, 1985The fundamental properties of the polyhedral sandwich dicarbollylcobaltate(III) anion {[pi-(3)-1,2-B(9)C(2)H(11)](2)Co(III)}(-) are given, together with results for extraction of alkali-metal, alkaline-earth metal and some other cations (e.g., H(+), Pb(2+), Pd(2+) and Ce(3+)) into nitrobenzene and corresponding analytical applications.
E, Makrlík, P, Va Nura
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Extraction of Microamounts of Yttrium from Strontium in a Water-Nitrobenzene System
Journal of Radioanalytical and Nuclear Chemistry, 2001A rapid extraction separation of trace amounts of yttrium from strontium with a nitrobenzene solution of sodium dicarbollylcobaltate (NaDCC) in the presence of polyethylene glycol having mean relative molecular weight 400 (PEG 400) and tetrasodium salt of ethylenediamine-N,N,N′,N′-tetraacetic acid (Na4L) in the aqueous phase was developed.
E. Makrlík, P. Vanura
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Extraction separation of strontium from calcium in the water-nitrobenzene system
Journal of Radioanalytical and Nuclear Chemistry Letters, 1985A rapid extraction separation of Sr2+ from Ca2+ with the nitrobenzene solution of sodium dicarbollylcobaltate /NaDCC/ in the presence of polyethylene glycol having mean relative molecular weight 400 /PEG 400/ and tetrasodium salt of ethylenediamine-N,N,N′,N′-tetraacetic acid /Na4L/ was developed. The separation factor αSr/Ca was approximately 104.
E. Makrlík, P. Vaňura
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Individual extraction constants of some dicarbollylcobaltate anions in the water-nitrobenzene system
Journal of Radioanalytical and Nuclear Chemistry Articles, 1995Individual extraction constants of nine dicarbollylcobaltate anions in the two-phase water-nitrobenzene system were determined radiometrically assuming that the changes of Gibbs energy of the transfer of the tetraphenylarsonium cation, Ph4As+, and of the tetraphenylborate anion, BPh 4 − , from the aqueous into the nitrobenzene phase are equal.
E. Makrlík +4 more
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Experimental study of Volta potentials in water/nitrobenzene systems with anion adsorption
Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1986Abstract The Volta potential of the water/nitrobenzene interface has been measured in the presence of tetraethylammonium picrate and sodium tetraphenylborate. The effect of the latter salt on the changes in surface potential and surface tension of both water and nitrobenzene-saturated water was also studied.
Irwina Zagórska, Zbigniew Koczorowski
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Charge transfer across the water/nitrobenzene interface by three-electrode system
Science in China Series B Chemistry, 2002A droplet of aqueous solution containing a certain molar ratio of redox couple is first attached onto a platinum electrode surface, then the resulting drop electrode is immersed into the organic solution containing very hydrophobic electrolyte. Combined with reference and counter electrodes, a classical three-electrode system has been constructed.
Yi Yuan +4 more
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Separation of yttrium from strontium in the aqueous phase of the water/nitrobenzene system
Journal of Radioanalytical and Nuclear Chemistry, 2002A rapid separation of carrier-free 90Y in the aqueous phase of the water/nitrobenzene extraction system from an 90Y/90Sr generator is proposed. After a three-stage extraction, the chemical yield of 90Y in the final aqueous phase was almost 90%, while the 90Sr radionuclide impurity in this phase containing carrier-free 90Y was about 10–10%.
P. Vaňura, E. Makrlík, M. Vobecký
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Journal of Molecular Liquids, 2021
Abstract The stability constants of the cationic complexes ML+, where M+= Li+, Na+, H3O+, Ag+, K+, NH4+, Tl+, Rb+, Cs+; and L = calix[4]crown ethers in nitrobenzene saturated with water were determined on the basis of the experimental distribution ratios of these cations.
Petr Vaňura +2 more
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Abstract The stability constants of the cationic complexes ML+, where M+= Li+, Na+, H3O+, Ag+, K+, NH4+, Tl+, Rb+, Cs+; and L = calix[4]crown ethers in nitrobenzene saturated with water were determined on the basis of the experimental distribution ratios of these cations.
Petr Vaňura +2 more
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Separation of microamounts of yttrium from strontium in the two‐phase water/nitrobenzene system
Journal of Radioanalytical and Nuclear Chemistry, 2002A rapid and very effective separation of carrier‐free 90 Y in the aqueous phase of the water/nitrobenzene system from an 90 Y/90 Sr generator is proposed. After a two‐stage extraction separation, the radionuclide impurity of 90 Sr in the final aqueous phase containing carrier‐free 90 Y is approximately 10 ‐16%, while the chemical yield of 90 Y in this ...
E. Makrlík, P. Vaňura, M. Vobecký
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