Synthesis, Adsorption, and Recognition Properties of a Solid Symmetric Tetramethylcucurbit[6]uril-Based Porous Supramolecular Framework

Abstract

In this work, we reported a porous supramolecular framework (A) constructed of a symmetric tetramethylcucurbit[6]uril (TMeQ[6]) in aqueous HCl solutions; the driving force was the outer surface interaction of cucurbit[n]urils, as well as hydrogen bonding between latticed water molecules and portal carbonyl oxygens of TMeQ[6]. Adsorption experimental results revealed that the porous supramolecular framework can absorb certain fluorophore guests (FGs) to form luminescent assemblies (FG@As) by fluorescence enhancement or colour change, and some of them can respond to certain volatile organic compounds. Thus, the TMeQ[6]-based supramolecular framework could be used as a sensor for certain gas or volatile compounds.

Supramolecular self-assembly between symmetric tetramethyl cucurbit[6]uril and dimethylphenylpiperazine hydrochloride

“…Phenylpiperazines exhibit good receptor subtype selectivity and urinary tract tissue selectivity, according to studies. Studies on the structure-activity relationship (SAR) of phenylpiperazines have demonstrated this type of compound's ability to inhibit α1 receptor and 5-HT receptor in recent years [39,40] ; the phenylpiperazine part is α1. In studies where receptors bind to drug basic centers, phenylpiperazine can be connected to carriers like anti-heterocyclic rings to give compounds with distinctive pharmacological properties, which can afford control of neuro-drugs and anti-virus agents [41][42][43][44][45] .…”

CdS-Based Catalysts Derived from TMeQ[6]/[CdxCly]n−-Based Frameworks for Oxidation Benzylamine

“…Because of its good water solubility, TMeQ[6] is often used to replace the insoluble Q[6] in the study of Q[6]-based host–guest chemistry − and coordination chemistry, , which are related to the electrostatic potential nearly neutral cavity and negative portal carbonyl oxygen atoms of Q­[ n ]­s. Since 2014, when we first proposed the outer surface interaction of Q­[ n ]­s (OSIQ), particularly self- and anion-induced OSIQs, which relate to the electrostatic potential positive outer surface of Q­[ n ]­s, our group and others have carried out significant works in constructing Q­[ n ]-based supramolecular frameworks based on OSIQs. − Further investigations have revealed that Q­[ n ]-based coordination polymers and frameworks can be used for the recovery a variety of metal ions, , the preparation of various sensors, etc. − Among these polymers and frameworks, TMeQ[6] has shown diversity in the construction of TMeQ[6]-based supramolecular frameworks. For example, different TMeQ[6]-based supramolecular frameworks can be formed not only in different acid media but also in the same acid medium with different concentrations .…”

“…Since 2014, when we first proposed the outer surface interaction of Q­[ n ]­s (OSIQ), particularly self- and anion-induced OSIQs, which relate to the electrostatic potential positive outer surface of Q­[ n ]­s, our group and others have carried out significant works in constructing Q­[ n ]-based supramolecular frameworks based on OSIQs. − Further investigations have revealed that Q­[ n ]-based coordination polymers and frameworks can be used for the recovery a variety of metal ions, , the preparation of various sensors, etc. − Among these polymers and frameworks, TMeQ[6] has shown diversity in the construction of TMeQ[6]-based supramolecular frameworks. For example, different TMeQ[6]-based supramolecular frameworks can be formed not only in different acid media but also in the same acid medium with different concentrations . In addition, the acquisition of rare Q[7]-based coordination polymers by the accidental introduction of the [CdCl 4 ] 2– anion and the construction of Q­[ n ]-based coordination polymers and supramolecular frameworks by consciously using polychloride anions of various transition metal ions ([M d‑block Cl y ] n − ) were described. , These works not only prompted us to propose the concept of OSIQs but also enabled us to fully realize its important role, particularly for anion-induced OSIQs, in the construction of Q­[ n ]-based coordination polymers and supramolecular frameworks.…”

“…21−25 Among these polymers and frameworks, TMeQ [6] has shown diversity in the construction of TMeQ [6]-based supramolecular frameworks. For example, different TMeQ [6]-based supramolecular frameworks can be formed not only in different acid media 21 but also in the same acid medium with different concentrations. 22 In addition, the acquisition of rare Q [7]-based coordination polymers by the accidental introduction of the [CdCl 4 ] 2− anion 26 and the construction of Q[n]-based coordination polymers and supramolecular frameworks by consciously using polychloride anions of various transition metal ions ([M d-block Cl y ] n− ) were described.…”

Cucurbit[6]uril-based supramolecular frameworks formed through outer surface interactions and application for iodine adsorption

“…It is precisely because of these structural characteristics that Q[n]s are seeing increased usage in supramolecular chemistry, with progress reported in Q[n]s host-guest chemistry [9][10][11][12][13][14] and Q[n]s coordination chemistry [15][16][17] . Our laboratory and others have been working on Q[n]-based supramolecular frameworks based on OSIQs since 2014 [18][19][20][21][22][23][24] , when we first proposed the outer surface interactions of Q[n]s (OSIQ) [18] , specifically self and anion-induced OSIQs [19] , which involved the electrostatic potential positive outer surface of Q[n]s. Further research has showed that Q[n]-based coordination polymers and frameworks can be utilized to recover a wide range of metal ions [23,24] , as well as to prepare various sensors [25][26][27][28][29][30][31] .…”