Modulation of Ribozyme and Deoxyribozyme Activities Using Tetraalkylammonium Ions

ChemPhysChem ◽  
2017 ◽  
Vol 18 (24) ◽  
pp. 3614-3619 ◽  
Author(s):  
Shu-ichi Nakano ◽  
Takaaki Watabe ◽  
Naoki Sugimoto
Keyword(s):  
Tetraalkylammonium Ions

Activity Coefficients and Gibbs Energies of Transfer of Tetraalkylammonium Dianilinetetraisothiocyanatochromates(III)

1994 ◽  
Vol 59 (8) ◽  
pp. 1738-1744
Author(s):  
Vladislav Holba
Keyword(s):  
Activity Coefficients ◽  
Transfer Functions ◽  
Butyl Alcohol ◽  
Methyl Ethyl ◽  
Tetraalkylammonium Ions ◽  
Ionic Transfer ◽  
Gibbs Energies ◽  
Gibbs Energies Of Transfer ◽  
Acetonitrile Solutions ◽  
Mixed Systems

The solubilities of tetraalkylammonium dianilinetetraisothiocyanatochromates(III) (alkyl = methyl, ethyl, 1-propyl, and 1-butyl) in water, water - methanol, water - tert-butyl alcohol and water - acetonitrile solutions were measured at 25 °C. The results were used to evaluate the activity coefficients and Gibbs energies of transfer of the saturating salts from water to the mixed systems. The Gibbs energies of transfer of the [Cr(C6H5NH2)2(NCS)4]- ion were obtained by means of known ionic transfer functions for the tetraalkylammonium ions based on the TATB assumption.

Interfacial behaviour of tetraalkylammonium ions at the Hg electrode in glycols

1987 ◽  
Vol 28 ◽  
pp. 135-146 ◽  
Author(s):  
J.I. Japaridze ◽  
V.A. Chagelishvili ◽  
Z.A. Khutzishvili ◽  
A. De Battisti ◽  
S. Trasatti
Keyword(s):  
Tetraalkylammonium Ions ◽  
Interfacial Behaviour

Conductimetric studies of ionic association of tetraalkylammonium halides in iso-propanol + water mixtures at 25 °C. Part II.

1988 ◽  
Vol 66 (7) ◽  
pp. 1720-1727 ◽  
Author(s):  
Auaz Ahmad Ansari ◽  
M. R. Islam
Keyword(s):  
Dielectric Constant ◽  
Association Constant ◽  
Ionic Association ◽  
Size Parameter ◽  
Solvent Interactions ◽  
Tetraalkylammonium Ions ◽  
Conductance Data ◽  
Electrical Conductivities ◽  
Ion Size ◽  
Tetraalkylammonium Halides

Electrical conductivities of Me4NBr, Et4NBr, Pr4NBr, Bu4NBr, and Bu4PBr have been measured in isopropanol + water (2-PrOH + H2O) mixtures covering the approximate range of dielectric constant (71.40 ≥ D ≥ 19.40) at 25 °C. The conductance data have been analysed by using the Fuoss-1978 (F78) conductance equation and the results compared with those obtained from the Fuoss–Onsager–Skinner (FOS) equation. The values of the limiting equivalent conductance, Λ0, the association constant, KA, and the distance of ion-size parameter [Formula: see text] are computed from these data. A better fit of the conductance data was provided by the F78 equation. Ion–solvent interactions and effective sizes of tetraalkylammonium ions are also discussed in order to understand the magnitude of the ionic association. The overall association behaviour of these salts has been found to increase with decrease in dielectric constant of the medium.

ChemInform Abstract: THERMODYNAMIC PROPERTIES OF TETRAALKYLAMMONIUM IONS IN AQUEOUS SOLUTION

1973 ◽  
Vol 4 (41) ◽  
pp. no-no
Author(s):  
D. A. JOHNSON ◽  
J. F. MARTIN
Keyword(s):  
Aqueous Solution ◽  
Thermodynamic Properties ◽  
Tetraalkylammonium Ions
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