ESR and optical studies of the interaction of alkali metal cryptates with the 9-fluorenone anion radical. Solvent effect on the equilibrium between contact and cryptand-separated ion pairs

1980 ◽  
Vol 102 (27) ◽  
pp. 7846-7848 ◽  
Author(s):  
Kazuo Nakamura
Keyword(s):  
Alkali Metal ◽  
Solvent Effect ◽  
Anion Radical ◽  
Ion Pairs ◽  
Optical Studies

Solvent effect on metal hyperfine constants in alkali metal radical anion ion pairs

1972 ◽  
Vol 76 (20) ◽  
pp. 2866-2871 ◽  
Author(s):  
T. R. Tuttle ◽  
J. C. Danner ◽  
Phillip Graceffa
Keyword(s):  
Alkali Metal ◽  
Solvent Effect ◽  
Radical Anion ◽  
Ion Pairs ◽  
Hyperfine Constants ◽  
Metal Radical

Solution Properties of Tetraalkylammonium Halide and Alkali-Metal Halide Ion Pairs. The Relationship Between Dissociation Constants and Solubility Products

1987 ◽  
Vol 40 (7) ◽  
pp. 1201 ◽  
Author(s):  
W Mizerski ◽  
MK Kalinowski
Keyword(s):  
Alkali Metal ◽  
Solubility Product ◽  
Dissociation Constants ◽  
Ion Pairs ◽  
Empirical Relation ◽  
Alkali Metal Halide ◽  
Alkali Metal Cations ◽  
Solubility Products ◽  
The Relationship ◽  
Dissociation Constant Kd

An empirical relation describing the effect of solvent on the dissociation constant ( Kd ) of ion pairs is described. An equation of the form pKd = apKso + bD-1 + c ( Kso and D stand for the solubility product of a given salt and for the electric permittivity of a solvent, respectively) has been tested with 13 sets of experimental data for salts containing tetraalkylammonium and alkali-metal cations. A successful correlation was obtained in 100% of the cases considered.

Axle component separated ion-pair recognition by a neutral heteroditopic [2]rotaxane

2014 ◽  
Vol 50 (13) ◽  
pp. 1540-1542 ◽  
Author(s):  
Richard C. Knighton ◽  
Paul D. Beer
Keyword(s):  
Alkali Metal ◽  
Metal Cation ◽  
Alkali Metal Cation ◽  
Ion Pairs ◽  
Ion Pair ◽  
Sodium Cation ◽  
Halide Anion ◽  
Cooperative Recognition

A neutral heteroditopic pyridine N-oxide axle containing [2]rotaxane, synthesised via sodium cation templation, displays cooperative recognition of alkali metal cation-halide anion ion-pairs in an unprecedented axle component separated ion-pair binding fashion.

Solvated electrons and the effect of coordination on the optical spectra of alkali metal cation – electron pairs in ethers

1977 ◽  
Vol 55 (19) ◽  
pp. 3356-3363 ◽  
Author(s):  
William Arthur Seddon ◽  
John Wallace Fletcher ◽  
Fred Charles Sopchyshyn ◽  
Ron Catterall
Keyword(s):  
Alkali Metal ◽  
Alkali Metal Cation ◽  
Ion Pairs ◽  
Alkali Metal Salts ◽  
Solvated Electrons ◽  
Electron Pairs ◽  
Monomeric Species ◽  
Spin Resonance ◽  
Resonance Data ◽  
Electron Spin Resonance Data

Pulse radiolysis of tetrahydrofuran (THF), dimethoxyethane (DME), diglyme (DG), and triglyme (TG), results in the formation of solvated electrons, es−, with optical band maxima λmax ≥ 1840 nm. In the presence of alkali metal salts transient optical bands are observed with λmax at ∼900 and ≥1600 nm. The latter bands are assigned to the formation of 'monomeric' species of stoichiometry M considered to be 'tight' and 'loose' ion-pairs, respectively. The proportion of 'loose' ion-pairs increases with decreasing temperature and increasing coordination of the solvent in the order [Formula: see text] These results demonstrate a good correlation with established electron spin resonance data in alkali metal solutions and substantiate the coexistence of at least two 'monomeric' species in DME and the glymes.

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