期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1972
卷号：69
期号：7
页码：1939-1942
DOI：10.1073/pnas.69.7.1939
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Equilibrium quotients for the 1:1 complexes of dibenzo-30-crown-10 with Na+, K+, Rb+, Cs+, NH4+, 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.
关键词：crown ethers ; spectrophotometry ; hydration energy ; binding energy
