scholarly journals Estimation of the Thermochemical Radii and Ionic Volumes of Complex Ions

2017 ◽  
Vol 56 (13) ◽  
pp. 7566-7573 ◽  
Author(s):  
Marcus C. Simoes ◽  
Kevin J. Hughes ◽  
Derek B. Ingham ◽  
Lin Ma ◽  
Mohamed Pourkashanian
Keyword(s):  
Complex Ions ◽  
Ionic Volumes

Apparent molar volumes for selected nitrogen base complexes of Co3+, Ni2+ and Cu2+ at 298 K

1981 ◽  
Vol 34 (4) ◽  
pp. 699 ◽  
Author(s):  
GA Bottomley ◽  
LG Glossop
Keyword(s):  
Apparent Molar Volume ◽  
Dissociation Constants ◽  
Apparent Molar Volumes ◽  
Volumetric Data ◽  
Complex Ions ◽  
Aromatic Diamines ◽  
Nitrogen Base ◽  
Molar Volumes ◽  
Ionic Volumes ◽  
Additive Rule

The apparent molar volumes of aqueous solutions of seven alkyl diamines and two aromatic diamines, and 15 of their complexes with Co3+, Cu2+ and Ni2+ have been measured at 298 K over a wide concentration range down to 10-4 mol dm-3. Intercomparison is made of the ion, ligand and related complex limiting apparent molar volumes which follow an additive rule. The following pairs of complex ions, with similar geometric ionic radius and structure but of opposite charge, [Co(en)3]3+ and [Co(ox)3]3-, and [Co(ox)2(en)]- and [Co(en)2(ox)]+ (en = ethylenediamine, ox = oxalate), show similar apparent ionic volumes, and solvent electrostriction. Solutions of [Ni(en)3] Cl2 undergo considerable dissociation: the effective apparent molar volume is analysed in terms of known dissociation constants and additional volumetric data for the generated species. For the less dissociated [CO(NH3)6]Cl3, logK6 is estimated to be 5.5 from the volumetric data.

Metal-Complex Ions in Hydrocarbons

1957 ◽  
Vol 12 (1_2) ◽  
pp. 96-109 ◽  
Author(s):  
Andrew Gemant
Keyword(s):  
Metal Complex ◽  
Complex Ions

Complex ions in fused salts

1960 ◽  
Author(s):  
Harmon Mark Garfinkel
Keyword(s):  
Complex Ions ◽  
Fused Salts

Photoelectromotive Force (PEMF) Studies of [Fe(CN)5SCN]3- Complex Ions Adsorbed on Pb(SCN)2 Semiconductor Surfaces

2001 ◽  
Vol 66 (1) ◽  
pp. 81-88 ◽  
Author(s):  
Horst Hennig ◽  
Athanasios Kokorakis ◽  
Stefan Fränzle ◽  
Cornelia Damm ◽  
Franz W. Müller ◽  
...  
Keyword(s):  
Redox Reactions ◽  
Visible Region ◽  
Laser Flash ◽  
Semiconductor Surfaces ◽  
Spectral Sensitization ◽  
Complex Ions ◽  
Hole Trapping ◽  
Photoelectromotive Force

Adsorbates of [Fe(CN)5SCN]3- complex ions on semiconducting Pb(SCN)2 surfaces were subject to photoelectromotive force (PEMF) investigations. Laser flash excitation of the adsorbates at 560 nm yields a weak PEMF signal due to spectral sensitization of the semiconductor Pb(SCN)2, not absorbing in the visible region. PEMF signals observed with laser flash excitation at 337 nm are explained by hole trapping accompanied with photoinduced redox reactions of the complex, when the number of flashes is increased.

Modeling of sorption kinetics of U(VI) micro-quantities nanostructured materials with anatase mesoporous structures

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Veniamin Zheleznov ◽  
Aleksey Golikov ◽  
Tatiana Sokolnitskaya ◽  
Sergey Ivannikov
Keyword(s):  
Nanostructured Materials ◽  
Sorption Kinetics ◽  
Uranyl Ion ◽  
Competitive Sorption ◽  
Hydroxyl Groups ◽  
Complex Ions ◽  
The Stability ◽  
Kinetics Of ◽  
Mesoporous Structures ◽  
Ionic Forms

Abstract The sorption kinetics of uranyl ions micro-quantities from fluoride solutions by nanostructured materials with anatase mesoporous structures has been studied. Using the model of competitive sorption of ions and positively charged complexes of uranyl ion on deprotonated hydroxyl groups of an anatase, kinetic curves of changes in the ratio of ionic forms of uranium in solution were calculated. Modeling was carried out under the assumption of a two-stage mechanism of uranium complex ions sorption. The modeling considered the influence of the uranyl ion carbonate complexes formation. The shift in equilibrium among ionic forms of uranyl correlates with the stability of the complexes in solution.

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