NMR STUDIES ON THE HYDRATION OF IONS IN MICROEMULSION——THE NAPHTHENIC ACID SOAP-ALCOHOL-KEROSINE-WATER MICROEMULSION SYSTEM

【摘要】 <正> The difference △δ between the proton shift of water of hydrauon of metar ions δ（H₂O（M⁴））and that of pure liquid water δ_H2O（1） so far observed is very small, only about ± 0.1 ppm,because the ratio of metal ions to H₂O molecules M⁺/H₂O cannot exceed 0.36 even in veryconcentrated aqueous solutions. In the present investigation, we study the hydration of metalions in microemulsions and propose a novel method to vary M⁺/H₂O ratio from 100:1 to1:100. Under such conditions, we have obtained the limits of δ（H₂O（M⁺）） for various cations asfollows: 7.54 ppm （NH₄⁺）, 7.08（Li⁺）, 6.22（Na⁺）, 6.00（K⁺）, while δ（H₂O（1）） = 4.80 ppm, sothat the largest △δ observed amounts to 2.74 ppm, thus rendering NMR method an effectivemeans to study the hydration of metal ions.更多还原

【Abstract】 The difference △δ between the proton shift of water of hydrauon of metar ions δ（H₂O（M⁴））and that of pure liquid water δ_H2O（1） so far observed is very small, only about ± 0.1 ppm,because the ratio of metal ions to H₂O molecules M⁺/H₂O cannot exceed 0.36 even in veryconcentrated aqueous solutions. In the present investigation, we study the hydration of metalions in microemulsions and propose a novel method to vary M⁺/H₂O ratio from 100:1 to1:100. Under such conditions, we have obtained the limits of δ（H₂O（M⁺）） for various cations asfollows: 7.54 ppm （NH₄⁺）, 7.08（Li⁺）, 6.22（Na⁺）, 6.00（K⁺）, while δ（H₂O（1）） = 4.80 ppm, sothat the largest △δ observed amounts to 2.74 ppm, thus rendering NMR method an effectivemeans to study the hydration of metal ions.更多还原