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合成了一种基于多重氢键组装形成的新型双杯冠化合物,利用核磁共振氢谱(1H NMR)和碳谱(13C NMR)以及高分辨质谱(ESI-HRMS)对组装前体分子结构进行了表征.通过一维和二维核磁共振氢谱(2D NOESY)研究了该双杯冠的的自组装结构,并采用核磁共振和紫外-可见光谱的方法测定了其对铯离子的络合.实验表明,通过氢键组装形成的双杯冠化合物,由于阻止了单杯冠分子内组装而限制了冠醚环构象改变,其萃取率由单杯冠的82%提高到96%.
A new double-crown compound based on multiple hydrogen bonding was synthesized. The molecular structure of the precursor was determined by 1H NMR and 13C NMR and ESI-HRMS The self-assembly structure of the double-cup crown was studied by one-dimensional and two-dimensional nuclear magnetic resonance spectroscopy (2D NOESY), and its complexation with cesium ion was determined by NMR and UV-visible spectroscopy , The double-cup compound formed by the assembly of hydrogen bonds limited the change of the crown ether ring structure by preventing the intramolecular assembly of a single cup, and the extraction rate increased from 82% to 96% of that of a single cup.