Macrocyclic ligand design. A synthetic, solvent extraction, computational and NMR study of the effect of cryptand flexibility on sodium ion affinity†
作者:Kenneth R. Adam、Ian M. Atkinson、Jeong Kim、Leonard F. Lindoy、Owen A. Matthews、George V. Meehan、Fiona Raciti、Brian W. Skelton、Niels Svenstrup、Allan H. White
DOI:10.1039/b102585f
日期:——
The rigidity of a series of cryptands incorporating an N2O6-donor has been shown to have a marked effect on the ability of such species to complex sodium ions. X-Ray and associated computational investigations, including molecular mechanics, semi-empirical (AM1) and ab initio (density functional) studies, coupled with the results of sodium picrate extraction experiments and NMR studies, have been employed to probe the conformational aspects influencing sodium ion complexation along the ligand series. It is concluded that the ease with which a cryptand is able to adopt an endo–endo conformation is an important factor affecting the occurrence of inclusive metal-ion binding in these systems.
一系列包含 N2O6 供体的穴状配体的刚性已被证明对此类物质络合钠离子的能力有显着影响。 X 射线和相关的计算研究,包括分子力学、半经验 (AM1) 和从头算(密度泛函)研究,加上苦味酸钠提取实验和 NMR 研究的结果,已被用来探讨影响钠的构象方面沿配体系列的离子络合。结论是,穴状配体能够采用内-内构象的难易程度是影响这些系统中包容性金属离子结合发生的重要因素。