Pillar[5]arene-based ion-pair recognition for constructing a [2]pseudorotaxane with supramolecular interaction induced LCST behavior

Abstract

A LCST-type [2]pseudorotaxane based on perbromoethylated pillar[5]arene/imidazolium iodide ionic liquid ion-pair recognition is constructed in both solution and the solid state. The thermo-responsiveness behavior can be adjusted by the molar...

Pillar[5]arene based water-soluble [3]pseudorotaxane with enhanced fluorescence emission for cell imaging and both type I and II photodynamic cancer therapy

“…29 Prof. Huang constructed a novel P5PR-based ionpair recognition with supramolecular interaction induced LCST behavior. 30 However, there are only a few reports on pillararenebased [3]pseudorotaxanes. [31][32][33] In particular, the construction and application of pillar [5]arene-based water-soluble [3]pseudorotaxanes are rarely reported.…”

Ion recognition properties of 2,2′-bibenzimidazole regulated by ammonium-modified pillar[5]arenes

“…[19][20][21][22][23] Due to abundant host-guest recognition properties, 24,25 pillar[n]arenes and their derivatives have been proven to serve as ideal hosts 26,27 for the fabrication of various MIMs 28,29 (mechanically interlocked molecules) and more advanced supramolecular structures. 30,31 On this basis, ion recognition systems have been constructed via the interactions of pillararenes with novel guests. [32][33][34][35][36][37] Hydrogen bonding, 38,39 π-π stacking interaction, 40 electrostatic interaction, 41 ionic interaction, 42 and covalent bonds are the potential driving forces behind these interactions.…”

Enhanced anion recognition by ammonium [2]catenane functionalisation of a halogen bonding acyclic receptor

“…3 Notably, heteroditopic hosts have demonstrated a plethora of potential applications including the extraction and recovery of transition and main-group metals, the solubilisation of inorganic salts in organic media, membrane transport and recognition of biologically-relevant zwitterions. 4–6…”

“…3 Notably, heteroditopic hosts have demonstrated a plethora of potential applications including the extraction and recovery of transition and main-group metals, the solubilisation of inorganic salts in organic media, membrane transport and recognition of biologically-relevant zwitterions. [4][5][6] Ion-pair recognition is associated with multiple complex equilibria. Strong ion-pairing, particularly in low polarity organic solvents, inhibits the complete dissociation of charged species, and only a fraction of free ions persists in solution.…”