Kiruthika Jeyavelraman, Srividhya Sankar, Arunachalam Murugan
Department of Chemistry, The Gandhigram Rural Institute (Deemed to be University), Gandhigram, Tamil Nadu, India 624 302.
Org Lett. 2020 Oct 16;22(20):7831-7836. doi: 10.1021/acs.orglett.0c02710. Epub 2020 Oct 2.
Synthesis of a new functionalized pillar[4]arene[1]quinone and its host-guest complexation with a bis-imidazolium dication was demonstrated. 1D/2D NMR spectroscopic analyses and high-resolution mass spectrometric analyses showed the formation of the pseudo[3]rotaxane assembly upon host-guest complexation. H NMR titration experiments revealed the role of hydrogen bonding motifs in bringing positive cooperativity by comparing the binding constants for the host-guest complexation of pillar[4]arene[1]quinone with a bis-imidazolium guest. Anion-responsiveness of the pseudo[3]rotaxane assembly was also demonstrated.
已证实一种新型功能化柱[4]芳烃[1]醌的合成及其与双咪唑鎓二价阳离子的主客体络合作用。一维/二维核磁共振光谱分析和高分辨率质谱分析表明，主客体络合后形成了准[3]轮烷组装体。氢核磁共振滴定实验通过比较柱[4]芳烃[1]醌与双咪唑鎓客体的主客体络合结合常数，揭示了氢键基序在产生正协同性方面的作用。还证明了准[3]轮烷组装体的阴离子响应性。
