Benzo-15-crown-5 (2,3,5,6,8,9,11,12-octahydrobenzo[b][1,4,7,10,13]pentaoxacyclopentadecine) and dibenzo-15-crown-5 (6,7,9,10,17,18-hexahydrodibenzo[b,h][1,4,7,10,13]pentaoxacyclopentadecine as fluorescent probes for physiologically important potassium ion
作者:Namrata Ghildiyal、Geeta Joshi nee Pant、M.S.M. Rawat
DOI:10.1016/j.ica.2018.11.052
日期:2019.3
NMR techniques. The effect of the anion on the stability of the complexes was observed by 1H NMR studies. The alkali metal ion is held to the oxygen donor atoms of the macrocyclic ring by ion-dipole interactions. The potential of the small ring oxacrown ethers, benzo-15-crown-5 and dibenzo-15-crown-5, to act as probes for potassium ions in dilute solutions (4.1 × 10−4 M) was investigated by recording
摘要阳离子识别在定义大分子在自然界中的高级功能中起着至关重要的作用。这种相互作用的一个例子是天然抗生素瓦利霉素的作用,其表现为钾离子载体。它包裹着阳离子,将其运输穿过细胞膜,并轻松地将其释放到细胞内。一些冠醚的大环配合物模仿了碱离子与天然离子载体的相互作用。我们已经合成了两种冠醚的配合物,即苯并15-冠-5(2,3,5,6,8,9,11,12-八氢苯并[b] [1,4,7,10,13]五氧杂环环戊二烯)和dibenzo-15-crown-5(6,7,9,10,17,18-六氢二苯并[b,h] [1,4,7,10,13]五氧杂环戊金胺与卤化钾(氟化物,氯化物,溴化物和碘化物) )在乙腈中进行表征,并通过IR,UV,ESI-MS,1H NMR和13C NMR技术对其进行表征。通过1 H NMR研究观察到阴离子对配合物稳定性的影响。碱金属离子通过离子-偶极相互作用被保持在大环的氧供体原子上。通过