新型24-冠-8醚加速钠离子迁移的研究（Ⅱ）

新型24-冠-8醚加速钠离子迁移的研究（Ⅱ） STUDING OF SCD1UM ICN TRANSFER FACILITATED BY A NEW CROWN ETHER（Ⅱ） 邵元华 Shao Yuanhua first-author 吴成泰 Wu Chengtai 赵藻藩 Zhao Zaofan 本文采用计时电位法和电流扫描极谱法,研究了一种24-冠-8醚DBC所加速的Na + 的界面迁移机理。根据τ 1/2 不随[1.13t S 1/2 +(D 0 1/2 /r 0 )t S ]的增加而增大的事实,证明此过程不是CE机理。由计时电位法及电流扫描极谱法的对数分析证明,所加速的Na + 的正向迁移过程是可逆的。但由反向计时电位法证明,DBC所加速的Na + 的反向迁移受到阻碍,为不可逆过程。求出了DBC在有机相中的平均扩散系数D 9 =1.2×10 -6 cm 2 s -1 。DBC与Na + 在有机相中生成配合物的稳定常数是1gk Na + ·DBC=3.00。 In this paper, the mechanism of sodium ion transfer facilitated by a new 24-crown-8 ether（DBC） was studied by Chronopotentiomety and Current-Scan-Polarography with stationary and ascending water electrodes. Results showthat τ 1/2 does not change with (1.13t s 1/2 +D 0 1/2 /r 0 t s )and the charge transfer process of sodium ion is not a CE mechanism. Furthermore, the positive facilitated transfer of sodium ion is reversible, which has been Verified by the logarithm analysis of the curves of chronopotentiometry and Current-Scan-Polarography. But the negative transfer of sodium ion facilitated by DBC is irreversible which was shown by the reversal chronopotentiometry. The average diffusion coefficient of DBC in the DCE phase is 1.2x10 -6 cm 2 s -1 and the stability constant of Na + -DBC complex is Igk Na +DBC=3.00. 四苯基-24-冠-8醚 钠离子迁移 计时电位法 电流扫描极谱法 Tetraphenyl-24-crown-8-ether Sodium ion transfer Chronopotenticmety Current-Scan-Polarography 1988-03-01 2021-04-01 3