14701-21-4Relevant articles and documents
The kinetics of some oxidation-reduction reactions involving silver(II)
Huchital,Sutin,Warnqvist
, p. 838 - 840 (1967)
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Schumb, W. C.,Sweetser, S. B.
, p. 871 - 874 (1935)
Features of electrolysis of nitric acid solutions of silver: I. Behavior of Ag(II) in HNO3 solutions
Rance,Nikitina,Korolev,Kirshin,Listopadov,Egorova
, p. 346 - 352 (2003)
The current efficiency of Ag(II) formation in the course of electrochemical oxidative dissolution of PuO2 was determined. It approaches 72% at the anodic potentials from 1.9 to 2.1 V (vs. SHE) and the anodic current densities of 0.006-0.013 A cm-2. The behavior of Ag(II) in 4 M HNO3 at 8, 25, and 40°C was studied. The reaction of Ag(II) with water can be described by the equation d[Ag(II)]/dt = kapp[Ag(II)] n, where n ～ 2 at 8-25°C and 2-1.5 at 39-41°C. The apparent rate constants of the reaction are 1.5 and 3.8 1 mol-1 min-1 at 8.5°C and 25°C, respectively. At 39-41°C, the reaction order with respect to Ag(II) ranges from 2 to 1.5, and the rate constant is about 1.2 11/2 mol-1/2 min-1.
Complex Formation followed by Internal Electron Transfer: the Reaction of silver(III) with Ascorbic Acid
Dasgupta, Subrata,Herlinger, Erwin,Linert, Wolfgang
, p. 567 - 570 (1993)
silver(III) 3+ 1 has been found to oxidize ascorbic acid (H2asc) in acidic aqueous solution via an inner-sphere mechanism to give dehydroascorbic acid, silver(I) and free ethylenebis(biguanide).The 1:1 adduct formed as an intermediate between 1 and ascorbic acid decomposes after a non-separable two-electron-transfer reaction.The decomposition of the three complexes actually formed, co-ordinating different numbers of protons, occurs through two parallel pathways: one via decomposition of the unprotonated adduct III(H2L)(H2asc)>, another via the deprotonated adduct III(H2L)(Hasc)>, while the protonated adduct III(H3L)(H2asc)> appears to be rather stable.The equilibrium constant for the adduct formation has been found to be 4.08 +/- 0.45 dm3 mol-1, whereas the acid and base constants of this complex are 0.41 mol dm-3 and 2.86 dm3 mol-1, respectively.The two rate constants for the decomposition are 25 +/- 3 and 220 +/- 25 s-1 for III(H2L)(H2asc)> and III(H2L)(Hasc)>, respectively.The possibility of an outer-sphere mechanism is discussed.
Noyes, A. A.,Hoard, J. L.,Pitzer, K. S.
, p. 1221 - 1229 (1935)
Kinetics of dissolution of silver nanoparticles inside triton N-42 reversed micelles
Tatarchuk,Bulavchenko,Druzhinina
, p. 1678 - 1683 (2009)
Our spectrophotometric study of the kinetics of dissolution of silver nanoparticles by nitric acid inside inverted micelles of Triton N-42 (a nonionic surfactant) verified the universal character of the mechanism for this type of process, which includes t
Kinetics of Oxidation of Azide by [Ethylenebis(biguanide)]silver(III) in Aqueous Acidic Media
Bandyopadhyay, Prabir,Dhar, Basab Bijayi,Bhattacharyya, Jhimli,Mukhopadhyay, Subrata
, p. 4308 - 4312 (2003)
In aqueous acidic media sodium azide and the orange-yellow title complex react quantitatively generating N2 gas along with a colourless solution of Ag+ ion and the ligand, ethylenebis(biguanide). The parent complex, [Ag(H2L)]3+, and one of its conjugate bases, [Ag(HL)]2+, participate in the reaction with N 3- as the kinetically reactive reductant. Ag+ has no catalytic effect. At 25.0 °C, I = 1.0 M (NaNO3), rate constants for the reactions [Ag(H2L)]3+ + N 3- and that for [Ag(HL)]2+ + N3 - are (12.3±0.5) and (3.8±0.6) M-1· S-1, respectively. The high rate constants along with the very low equilibrium constant (10-15 M-1) calculated for the first reaction strongly suggest inner-sphere redox mechanism. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.
Hunt, F. L.
, p. 795 - 803 (1911)
Ghosh, Sanchita P.,Ghosh, Manik C.,Gould, E. S.
, p. 83 - 88 (1994)
Luminescent coordination polymers with extended Au(I)-Ag(I) interactions supported by a pyridyl-substituted NHC ligand
Catalano, Vincent J.,Etogo, Anthony O.
, p. 6041 - 6050 (2005)
Reaction of [Ag(CH3impy)2]PF6, 1, with Au(tht)Cl produces the monometallic Au(I)-species [Au(CH3impy) 2]PF6, 2. Treatment of 2 with excess AgBF4 in acetonitrile, benzonitrile or benzylnitrile produces the polymeric species {[AuAg(CH3impy)2(L)](BF4)2} n, (L = CH3CN,3; L = C6H5CN, 4; L = C6H5CH2CN, 5) where the Au(I) centers remain bound to two carbene moieties while the Ag(I) centers are coordinated to two alternating pyridyl groups and a solvent molecule (L). Reaction of 2 with AgNO3 in acetonitrile produces the zig-zag mixed-metal polymer {[AuAg(CH3impy)2(NO3)]NO3} n, 6, that contains a coordinated nitrate ion in place of the coordinated solvent species. All of these polymeric materials are dynamic in solution and dissociate into their respective monometallic components. Compounds 2-6 are intensely luminescent in the solid-state and in frozen solution. All of these complexes were characterized by 1H, 13C NMR, electronic absorption and emission spectroscopy and elemental analysis.
Kinetics of Formation and Dissociation of the Cryptates Ag(2,2,2)+ and K(2,2,2)+ in Acetonitrile+Water Mixtures at 25 deg C
Cox, B. G.,Guminski, C.,Firman, P.,Schneider, H.
, p. 1357 - 1361 (1983)
The dissociation rates of Ag(2,2,2)+ and K(2,2,2)+ in acetonitrile (AN)+ water system show a quite different dependence upon solvent mole fraction.The dissociation rate constant, kd, of Ag(2,2,2)+ is almost indepependent of solvent composition and the rapid decrease of the stability constant, Ks, near xAN = 0 is determined completely by the variation in the formation rate constant, kf.The constant value for kd for Ag(2,2,2)+ in the mixtures indicates that in the transition state the silver ion is strongly bonded to the (2,2,2) nitrogen atoms in a manner typical of the partially covalent interaction of monovalent d10 ions with nitrogen donors (e.g., in nitrilic solvents).This result, and the very similar variation of the Gibbs free energies of the transition state and stable cryptate complex with solvent composition, suggests that the transition state is very close to that of the products.The result is striking because for alkali-metal cryptates, particularly in nonaqueous solvents, a very similar solvent dependence is found for the reactants and transition state.The interaction between K+ and (2,2,2) is also found to be very different in this binary solvent system from that of Ag(2,2,2)+.Both kd andKf contribute similarly to the increase of the stability constant of K(2,2,2)+ with increasing mole fraction of acetonitrile, and comparisons of the Gibbs free energies of reactants, transition state, and product do not indicate any simple correlations between the solvation behavior of the three over the whole range of solvent composition.
Lietzke, M. H.,Stoughton, R. W.
, p. 745 - 746 (1969)
Formation of small negative and positive cluster ions of gold, silver, and copper by direct laser vaporization
Moini, Mehdi,Eyler, John R.
, p. 5512 - 5515 (1988)
Direct laser vaporization techniques have been employed to produce small cluster cations and anions of gold, silver, and copper in a Fourier transform ion cylotron resonance mass spectrometer using pure metal samples.Aunp (p = +1 and -1, n = 1-6), Agn+ (n = 1-3 ), Ag-, Cun+ (n = 1-3), and Cun- (n = 1-2) were observed, using two different experimental configurations.In one configuration ions were produced by Nd:YAG laser irradiation directed collinear with the magnetic field in the FTICR mass spectrometer while in the second laser light directed perpendicularly to the magnetic field was used.Relative kinetic energies of the aggregates, the relative intensities of positive vs negative ions, and the nature of the neutrals in the plasma formed by direct laser vaporization are discussed.
Bruckenstein,Mukherjee
, p. 1601 (1960)
Noyes, A. A.,Brann, B. F.
, p. 1016 - 1016 (1912)
DEVICES FOR TREATMENT OF SKIN DISORDERS
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, (2011/06/25)
The present invention discloses a layer of fabrics having antibacterial/microbe-resistant properties that are designed for contacting with the human skin. The fabric layer can be disposed, directly or indirectly, onto a pillowcase, pillow, comforter, comforter cover, head support, bed cloth, sleeping bag, mattress, cushion, blanket, and garment.
