Estimation of Li+, K+ and Ca2+ complexation with [12]crown-4, [15] crown-5and [18]crown-6 using a Na+ISE in dioxane-water, part IV - Cation equilibrium constants of macrocyclic ethers with ion selective electrodes
C. Erk et al., Estimation of Li+, K+ and Ca2+ complexation with [12]crown-4, [15] crown-5and [18]crown-6 using a Na+ISE in dioxane-water, part IV - Cation equilibrium constants of macrocyclic ethers with ion selective electrodes, MIKROCH ACT, 132(1), 1999, pp. 79-82
The (1:1) Na+ equilibrium constants, K-e1, of macrocyclic ethers of [12]cro
wn-4, [12]crown-5 and [18]crown-6 were determined with a Na+ ISE in the pre
sence of a second cation e.g. Li+, K+ and Ca2+ in dioxane/water (50/50). We
estimated the (1:1)equilibrium constants, K-e2 of the macrocyclic ethers w
ith Li+, K+ and Ca2+ by this way. The binding selectivity of a macrocyclic
ether between two cations was estimated in the same binary solvent mixture
where the water hydration role is diminished. Results showed clearly the ef
fect of macrocyclic size and cation radii in a solution.