Studies on the mechanism of sodium ion transfer facilitated by a new 24-crown-7 crown ether

Abstract

The mechanism of Na+ transfer facilitated by a new crown ether (24-crown-8, I) was studied by chronopotentiometry and current-scan-polarog. The charge transfer process of Na+ is neither a chem. nor an electrochem. mechanism. Furthermore, the facilitated transfer of Na ions is reversible, which was verified by various experimental methods. The average diffusion coefficient of I in the 1,2-dichloroethane (DCE) phase is 7.8 ?10-6 cm2/s, and the stability constant of the Na+-I complex in the DCE phase is log KNa+-I = 3.97. The square root of transfer time of Na+ was related to the concns. of Na+ and I which could be used for determing Na+ and I.

Key words: AMMONIUM COMPOUND, SODIUM ION, CROWN ETHER COMPOUNDS, PHASE TRANSFORMATION, ELECTROLYTE, DIFFUSION COEFFICIENTS, OXYGEN HETEROCYCLICS, CHRONOPOTONTIOMETRY, DIENE P, TETRAPHENYLBORATE

CLC Number:

O646

Cite this article

SHAO YUANHUA;ZOU ZHENFU;WU CHENGTAI;ZHAO ZAOFAN. Studies on the mechanism of sodium ion transfer facilitated by a new 24-crown-7 crown ether[J]. Acta Chimica Sinica, 1989, 47(11): 1113-1116.

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一种新型24-冠-8醚推动钠离子转移的机理研究