Triphenylamine-Based Pyridine<i>N</i>-Oxide and Pyridinium Salts for Size-Selective Recognition of Dicarboxylates
作者:Kumaresh Ghosh、Goutam Masanta、Asoke P. Chattopadhyay
DOI:10.1002/ejoc.200900471
日期:2009.9
Triphenylamine-based receptors 1–3 have been designed and synthesized for the recognition of dicarboxylates. The correct dispositions of the binding groups in both 1 and 2 under 4,4′-dicarbonyltriphenylamine spacer enable them to bind aliphatic dicarboxylates of different chain lengths with moderate binding constant values. In the binding event, triphenylamine-based pyridinium salt 2 is found to be
已经设计并合成了基于三苯胺的受体 1-3,用于识别二羧酸盐。1 和 2 中的结合基团在 4,4'-二羰基三苯胺间隔基下的正确配置使它们能够以中等结合常数值结合不同链长的脂肪族二羧酸盐。在结合事件中,发现基于三苯胺的吡啶鎓盐 2 比基于三苯胺的吡啶 N-氧化物 1 更有效,并且显示出对长链庚二酸的选择性。结合发生在带电位点,伴随着基于 PET(光诱导电子转移)的三苯胺基序发射猝灭。使用 1 H NMR、UV/Vis 和荧光光谱方法在 DMSO 中监测结合。通过引用理论结果,本研究中吡啶鎓结合位点的效率已被合理化。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)