ConspectusPorous materials with high surface areas have drawn more and attention in recent years because of their wide applications physical adsorption energy-efficient adsorptive separation processes. Most the reported porous are macromolecular materials, such as zeolites, metal–organic frameworks (MOFs), or coordination polymers (PCPs), organic (POPs) covalent (COFs), which building blocks linked together by coordinative bonds. These barely soluble thus not solution-processable....

Here we report that easily obtained per-ethylated pillar[6]arene (EtP6) is a new adsorbent for iodine capture with high chemical and thermal stability. Nonporous EtP6 solids are shown to not only volatile in the air but also dissolved an organic solvent aqueous solution. Uptake of leads structural transformation solid state. In single crystal structure iodine-doped (I2@EtP6), each adsorbed molecule located between two adjacent molecules form linear supramolecular polymer. Iodine released...

The separation of cyclic aliphatics high purity, which are produced from hydrogenation the corresponding aromatics, is highly desired in chemical industry. An energy-efficient and environmentally friendly adsorptive method using nonporous adaptive crystals perethylated pillar[5]arene (EtP5) pillar[6]arene (EtP6) described. Adaptive EtP5 separate toluene methylcyclohexane with 98.8 % while EtP6 99.2 purity. selectivities come stability new crystal structures upon capture methylcyclohexane,...

Here we show a new adsorptive separation approach using nonporous adaptive crystals of pillar[5]arene. Desolvated perethylated pillar[5]arene (EtP5α) with character selectively adsorb 1-pentene (1-Pe) over its positional isomer 2-pentene (2-Pe), leading to structural change from EtP5α 1-Pe loaded structure (1-Pe@EtP5). The purity reaches 98.7% in just one cycle and can be reused without losing performance.

Separation of monochlorotoluene isomers is a vital process to obtain highly pure p-chlorotoluene, which irreplaceable in the production medicines and pesticides. However, traditional separation methods suffer from great energy consumption, cumbersome operation or use organic desorbents. Herein, an energy-efficient environmentally friendly method developed through absorptive strategy based on nonporous adaptive crystals perethylated pillar[5]arene (EtP5) pillar[6]arene (EtP6). EtP5 EtP6...

Postsynthetic modification in crystalline solids without disruption of crystallinity is very important for exerting control that unattainable over chemical transformation solution. This has been achieved porous frameworks via solid-solution reactions to endow them with multiple functions. However, this rather rare nonporous molecular crystals, especially solid–vapor reactions. Herein, we report unique postsynthetic adaptive crystals (NACs) a pillar[4]arene[1]quinone (EtP4Q1) containing four...

The separation of dihalobenzene isomers, such as dichlorobenzene isomers and difluorobenzene has a high practical value in both synthetic chemistry industrial production. Herein we provide simple to operate energy-efficient adsorptive method using nonporous adaptive crystals perbromoethylated pillar[5]arene (BrP5) pillar[6]arene (BrP6). BrP6 show preference towards the ortho isomer mixtures, but cannot discriminate isomers. Single-crystal structures reveal that this selectivity is derived...

Abstract The research for the solid‐state supramolecular polymers with specific functions accelerates development of and materials sciences. Herein, we discover different complexation modes perethylated pillar[5]arene ( EtP5 ) 1,2,4,5‐tetracyanobenzene TCNB in various solvents. Driven by charge‐transfer interaction, is enclosed cavity CHCl 3 , while complexes at exo‐wall CH 2 Cl . This because size matches forcing to complex Furthermore, fabricate a vapochromic polymer exploiting...

Two monochloropyridine isomers, 2-chloropyridine (2-CP) and 3-chloropyridine (3-CP), are in need of a more effective separation method besides rectification. Herein we offer facile energy-saving adsorptive strategy using nonporous adaptive crystals perethylated pillar[5]arene (EtP5), pillar[6]arene (EtP6), perbromoethylated (BrP5), (BrP6), which possess different cavity sizes substituents have never been employed the single-substituted heterocyclic aromatic compounds. BrP6 show marked...

Organic solid-state fluorescent crystals have received extensive attention owing to their remarkable and promising optoelectronic applications in many fields. Current methods obtain organic usually involve two steps: (1) solution phase synthesis (2) crystallization of target compounds. Direct transformation from nonfluorescent by postsynthetic modification (PSM) might be a potential alternative the traditional methods. Although it is common implement PSM for porous frameworks, remains huge...

Removal of trace chlorobutane (CB) isomers is highly desired to produce high grade 1-chlorobutane (1-CB) and 2-chlorobutane (2-CB). Here, we report that nonporous adaptive crystals (NACs) perethylated pillar[5]arene (EtP5) pillar[6]arene (EtP6) effectively remove CB isomers. EtP5 NACs can 1-CB (2%) from 2-CB improve its purity 98.0% 99.9%, while EtP6 99.9%. The adsorption results in the formation new CB-loaded crystal structures, whose thermostability higher than their corresponding...

The detection and adsorption of volatile low-molecular-weight aliphatic aldehydes is significance, owing to their physical volatility, chemical toxicity, widespread applications in industrial processes. Here, nonporous adaptive pillar[4]arene[1]quinone (EtP4Q1) crystals with vapochromic behavior are used for the aldehyde uptake sensing. When desolvated EtP4Q1 (EtP4Q1α) exposed different carbon chain lengths, they quantitatively adsorb vapors these aldehydes, accompanied by color changes....

The separation of 2-methylfuran (MeF) and 2,5-dimethylfuran (DMeF) mixtures is very important in the chemical industry. Herein, we offer a novel strategy for MeF DMeF using nonporous adaptive crystals (NACs) perethylated pillar[5]arene (EtP5), pillar[6]arene (EtP6), perbromoethylated (BrP5), (BrP6). We find that EtP6 BrP5 show remarkable selectivities 50:50 (v/v) MeF:DMeF mixture vapor, yielding purities 94.0 96.3%, respectively. Single-crystal structures reveal these different come from...

Abstract The separation of cyclic aliphatics high purity, which are produced from hydrogenation the corresponding aromatics, is highly desired in chemical industry. An energy‐efficient and environmentally friendly adsorptive method using nonporous adaptive crystals perethylated pillar[5]arene (EtP5) pillar[6]arene (EtP6) described. Adaptive EtP5 separate toluene methylcyclohexane with 98.8 % while EtP6 99.2 purity. selectivities come stability new crystal structures upon capture...

Here, we announce the establishment of a new family organic molecular cages, named cagearenes, by taking advantage versatile strategy. These cagearenes were prepared via Friedel-Crafts reaction condensing two equivalents precursor bearing three 1,4-dimethoxybenzene groups and formaldehyde. Two namely cagearene-1 cagearene-2, are obtained well characterized. The solid exhibits ability to adsorb benzene vapour from an equimolar benzene/cyclohexane mixture with purity 91.1%. Then, adsorbed...

Precise sub‐Ångstrom‐level porosity engineering, which is appealing in gas separations, has been demonstrated solid carbon, polymer, and framework materials but rarely achieved the liquid phase. In this work, a molecular sieving effect phase at sub‐5 Ångstrom scale created via sophisticated tuning calixarene‐derived porous liquids (PLs). Type II PLs are constructed supramolecular complexation between sodium salts of calixarene derivatives crown ether solvents. The chemical structure...

Precise sub-Ångstrom-level porosity engineering, which is appealing in gas separations, has been demonstrated solid carbon, polymer, and framework materials but rarely achieved the liquid phase. In this work, a molecular sieving effect phase at sub-5 Ångstrom scale created via sophisticated tuning calixarene-derived porous liquids (PLs). Type II PLs are constructed supramolecular complexation between sodium salts of calixarene derivatives crown ether solvents. The chemical structure...

Organic room-temperature phosphorescence (RTP) has received much attention, and yet most organic RTP materials are in the crystalline state, limiting their wide applications. Herein, we provide a new strategy to enhance amorphous state by copolymerization host–guest complexation. A random copolymer, prepared from acrylamide crown ether derivative, shows not only satisfactory but also improved phosphorescent behavior presence of K+. Acrylamide units polymeric material sufficient hydrogen...

Abstract The separation of dihalobenzene isomers, such as dichlorobenzene isomers and difluorobenzene has a high practical value in both synthetic chemistry industrial production. Herein we provide simple to operate energy‐efficient adsorptive method using nonporous adaptive crystals perbromoethylated pillar[5]arene ( BrP5 ) pillar[6]arene BrP6 ). show preference towards the ortho isomer mixtures, but cannot discriminate isomers. Single‐crystal structures reveal that this selectivity is...

Postsynthetic modification (PSM) has been widely used in porous crystalline materials to gain better performance adsorptive separation of gases or hydrocarbons. We here report that guest adsorption selectivity a kind nonporous materials, namely adaptive crystals (NACs), can be readily and precisely tuned via facile substituent-size-dependent solid-vapor PSM method. Before PSM, NACs pillar[4]arene[1]quinone EtP4Q1 show negligible for C5 with larger substituent, cyclopentylamine, onto does not...

We use nonporous adaptive crystals of perethylated pillar[6]arene to adsorb heterocyclic compounds from a mixture toluene and with high selectivity, ultimately improving the purity 96.78% 99.00%.

Isopropylbenzene (IPB) and α-methylstyrene (AMS), two members of C9 aromatics, are important in both industrial production laboratory research, but the separation IPB/AMS mixtures is still a big challenge. Here, we provide new strategy to separate IPB AMS using nonporous adaptive crystals four pillararenes, perethylated pillar[5]arene, pillar[6]arene, perbromoethylated pillar[6]arene (BrP6). Among them, BrP6 selectively adsorbs from an equal volume mixture with >95% purity for solid–vapor...