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用与Popov等不同的多核NMR化学位移方法测定了水溶液中Na~+及NH_4与18-冠-6的络合平衡常数K分别为logK=0.72和logK=1.21。对实验方法、多核线宽等进行了讨论。
The complex equilibrium constants K of Na ~ + and NH_4 with 18-crown-6 in aqueous solutions were determined by using different methods of multi-nuclear NMR chemical shifts, such as Popov, with logK = 0.72 and logK = 1.21, respectively. The experimental method, multi-core linewidth, etc. are discussed.