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Citation: Li Zhi-Fen, Jiang Jun-Ping, Sun Bin, Liu Rui-Lin. ³⁵Cl NMR Study on Ion Pair and Ionic Solvation in Solution[J]. Acta Physico-Chimica Sinica, ;1992, 8(06): 772-777. doi: 10.3866/PKU.WHXB19920611 shu

³⁵Cl NMR Study on Ion Pair and Ionic Solvation in Solution

1.
Institute of Physical Chemistry, Peking University, Beijing 100871

Received Date: 13 July 1991
Available Online: 15 December 1992

This research has recorded the linewidth of ~(35)Cl of Sr(ClO_4)_2 and Ba(ClO_4)_2 at 0.5 mol·L~(-1) in acetonitrile and ethanol. In terms of nuclear quadrupole moment relaxation mechanism and together with the results for Mg(ClO_4)_2 and Ca(ClO_4)_2 in literature contact type of ion pair for perchlorate salts of alkali earth metals was argued. The linewidth of ~(35)Cl at fixed concentration of Sr (ClO_4)_2 and Ba(ClO_4)_2 in acetonitrile or ethanol as bulk solvent was measured as a function of [B]/[M~(2+)]. where B represents H_2O or DMF. The trend of the plot and the reason for that were explained and the solvation number for Sr~(2+) were estimated. Mole conductivities of salts were also measured and explained for supporting of contact ion pair.
- Relaxation rate; Electric field gradient; Ion pair; Ionic solvation; Perchlorate salts
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35Cl NMR Study on Ion Pair and Ionic Solvation in Solution

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³⁵Cl NMR Study on Ion Pair and Ionic Solvation in Solution