Molecular clips based on diphenylglycoluril and benzocrown ethers: promising complexing agents for the alkali metal cations
作者:Leonid S. Kikot’、Alexander Yu. Lyapunov、Catherine Yu. Kulygina、Tatiana Yu. Bogaschenko、Roman I. Zubatyuk、Oleg V. Shishkin、Tatiana I. Kirichenko
DOI:10.1007/s10847-013-0357-3
日期:2014.8
“classical” 1:2 complexes were found. Their ratio varies depending on the molecular clips nature and on the cation type. It was found an unexpected selectivity of the molecular clip with benzo-15-crown-5 moieties toward K+ and Rb+ cations. The molecularstructure of the clip complex with benzo-15-crown-5 fragments and sodium picrate was determined by X-ray crystallography. The crystalstructure and solution-state
研究了含有二苯基甘脲和苯并冠醚部分的新分子片段与碱金属离子的相互作用。稳定性常数通过分光光度法滴定测定,氯化物盐在甲醇中。复合物稳定性和阳离子结合选择性被证明取决于冠醚部分的大小。发现了“夹心型”1:1(clip to cation)配合物和“经典”1:2配合物。它们的比例取决于分子夹的性质和阳离子类型。发现具有 benzo-15-crown-5 部分的分子夹对 K+ 和 Rb+ 阳离子具有意想不到的选择性。通过 X 射线晶体学确定具有 benzo-15-crown-5 片段和苦味酸钠的剪辑复合物的分子结构。