Double‐Cavity Nor‐Seco‐Cucurbit[10]uril Enables Efficient and Rapid Separation of Pyridine from Mixtures of Toluene, Benzene, and Pyridine

Abstract

Benzene, toluene and pyridine are widely used as essential raw materials in industry and laboratory research, with stringent purity requirements. Herein, we show that solid double‐cavity host nor‐seco‐cucurbit[10]uril (ns‐Q[10]) functions as an efficient adsorption separator for pyridine; benzene and toluene can be obtained in >99.9 % purity by this method. Thermal removal of pyridine from ns‐Q[10]⋅Py2 allows 10 separation cycles without erosion of performance. The geometry of the ns‐Q[10]⋅Py2 ternary complex was established by single‐crystal X‐ray diffraction methods. The ns‐Q[10] cage facilitates the removal of pyridine from toluene and benzene, with >99.9 % purity for the separated compounds.

MOFTextile: Metal‐organic frameworks nanosheets incorporated cotton textile for selective vapochromic sensing and capture of pyridine

“…Py adsorption was reported using several materials (Table 2). It can be removed via several materials, including activated carbon, [2] bagasse fly ash (BFA), [5] tea waste residue (TWR), [58] carbon black filler (grade N330)/styrene butadiene rubber (SBR) membrane, [7,59] zeolite, [60,61] cucurbit [10]uril, [62] and membrane of MoS 2 / polyether block amide (PEBA) copolymer. [6] Rice husk ash and commercial granular activated carbon (GAC) were used for the adsorption of Py.…”

Investigation of the Interaction of Benzo(a)Pyrene and Fluoranthene with Cucurbit[n]urils (n = 6–8): Experimental and Molecular Dynamic Study

“…Cucurbiturils cannot conform to the shape of guests, and therefore it is expected that complexation occurs with exceptional specificity and with high association constants [ 19 ]. This unique structure makes CB[n] a prime component in a wide range of applications, such as sensing, catalysis, biomolecular recognition, drug delivery, polymer material, molecular machines [ 20 , 21 ], separation of organic molecules [ 22 ] and in supramolecular assemblies [ 23 ].…”

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

“…Supramolecular self-assembly has received intense interest recently given its applications in areas including chemistry [1][2][3][4][5][6] , materials [7,8] , environmental science [9][10][11] , and life science [12,13] . An essential step in the process of creating new systems is the selection of diverse building blocks, which allow for the creation of supramolecular self-assembled systems with unique shapes and distinct features stabilized through weak interactions such as ion-ion dipoles and intermolecular hydrogen bonds.…”