单价阳离子与环状聚醚之间络合物形成的弛豫研究。
Relaxation study of complex formation between monovalent cations and cyclic polyethers.
作者信息
Chock P B
出版信息
Proc Natl Acad Sci U S A. 1972 Jul;69(7):1939-42. doi: 10.1073/pnas.69.7.1939.
Abstract
Equilibrium quotients for the 1:1 complexes of dibenzo-30-crown-10 with Na(+), K(+), Rb(+), Cs(+), NH(4) (+), and T1(+) in methanol solution have been determined spectrophotometrically. The observed selectivity pattern is discussed in terms of the hydration energy of the cations and the cation-ligand binding energy. The rate of complex formation is diffusion-controlled. Relaxation amplitude data are consistent with a mechanism that involves conformational change of the crown compound.
摘要
已通过分光光度法测定了二苯并 - 30 - 冠 - 10 与 Na⁺、K⁺、Rb⁺、Cs⁺、NH₄⁺和 Tl⁺在甲醇溶液中 1:1 配合物的平衡商。根据阳离子的水合能和阳离子 - 配体结合能对观察到的选择性模式进行了讨论。配合物形成的速率受扩散控制。弛豫幅度数据与涉及冠醚化合物构象变化的机制一致。
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