Journal
ORGANIC LETTERS
Volume 22, Issue 20, Pages 7831-7836Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.0c02710
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Funding
- Council of Scientific and Industrial Research [01(3001)/19/EMR-II]
- DST-FIST program [SR/FST/CSI-255/2013(C)]
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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-1 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.
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