Because C2 H4 plays an essential role in the chemical industry, economical and energy-efficient separation of ethylene (C2 ) from ethane H6 is extremely important. With exception energy-intensive cryogenic distillation, there are few one-step methods to obtain polymer-grade (≥99.95 % pure) /C2 mixtures. Here we report a highly stable metal-organic-framework (MOF) FJI-H11-Me(des) (FJI-H=Hong's group Fujian Institute Research on Structure Matter) which features one-dimensional hexagonal...

Hydrogen-bonded organic frameworks (HOFs) show great potential in energy-saving C2 H6 /C2 H4 separation, but there are few examples of one-step acquisition from because it is still difficult to achieve the reverse-order adsorption and . In this work, we boost separation performance two graphene-sheet-like HOFs by tuning pore polarization. Upon heating, an situ solid phase transformation can be observed HOF-NBDA(DMA) (DMA=dimethylamine cation) HOF-NBDA, accompanied with electronegative...

The one-step efficient separation of high-purity C

Separation of methanol-to-olefins (MTO) products to obtain high-purity C2H4 and C3H6 is great importance, since it provides an alternative process for such important industrial raw materials. However, developing adsorbents with high C2H4/C3H6 selectivity productivity remains challenging. Herein, we report ultrastable layered hydrogen-bonded framework (HOF-NBDA), which features preferred pore multiple interlaminar interactions C3H6. It delivers ultrahigh uptake (3.6 mmol g–1) at 10 kPa, while...

n-C

One-step adsorptive purification of ethylene (C2H4) from ternary mixture comprising acetylene (C2H2), and carbon dioxide (CO2) is a great challenge in the chemical industry. Herein, microporous metal-organic framework (FJI-H38) has been reported, which possesses high density electronegative O/N binding sites appropriate pore size. Notably, at 0.01 bar 298 K FJI-H38 shows excellent trapping capability for C2H2 (1.64 mmol/g) CO2 (2.33 mmol/g), while uptake C2H4 only 0.41 mmol/g, endows...

Developing a noncontact ratiometric luminescent temperature sensor with high sensitivity, widely available emission range, and reliable performance is challenge in materials science. Herein, we demonstrated that this goal can be achieved by fabricating lanthanide-functionalized hydrogen-bonded organic framework film (named the Eu@HOF-TCBP film). The unbonded carboxylic groups existed structure not only enable lanthanide ions to bind for bringing dual but also allow preparing (HOF) through...

Purification of C

Recently, metal-organic frameworks (MOFs) as the cathode materials for aqueous zinc-ion batteries (ZIBs) received growing attention. Herein, a novel MOF, Ni-Ndi-trz (Ndi-trz=2,7-di(4H-1,2,4-triazol-4-yl)benzo[lmn][3,8]phenanthroline-1,3,6,8(2H,7H)-tetraone) was synthesized through solvothermal method. Its rational design using naphthalene diimide (Ndi) core allowed formation of four-fold interpenetrated pcu (primitive cubic) topology. The as-synthesized is highly stable over wide pH range...

Recently, methanol-to-olefins (MTO) technology has been widely used. The development of new adsorbents to separate MTO products and obtain high-purity ethylene (C2H4) propylene (C3H6) become an urgent task. Herein, exceptionally highly water-stable metal–organic framework (MOF), [Cu3(OH)2(Me2BPZ)2]·(solvent)x (1) (H2Me2BPZ = 3,3′-dimethyl-1H,1′H-4,4′-bipyrazole) with hexagonal pores, elaborately designed constructed. After being soaked in water for 7 days, it still maintains its structure,...

Since hydrocarbons have been widely used in industrial production, it is particularly important to prepare stable and efficient crystalline porous materials for gas storage. Metal‐organic frameworks (MOFs) are an excellent kind of storage because their high void volumes, adjustable pore structures specific surface areas. Here, we report a framework (FJI‐W‐Ni) with Bruner‐Emmet‐Teller (BET) area (1511 m2 g‐1) which has high‐density N/O/F atoms the pore. FJI‐W‐Ni can not only maintain its...

One‐step adsorptive purification of ethylene (C2H4) from ternary mixture comprising acetylene (C2H2), and carbon dioxide (CO2) is a great challenge in the chemical industry. Herein, microporous metal‐organic framework (FJI‐H38) has been reported, which possesses high density electronegative O/N binding sites appropriate pore size. Notably, at 0.01 bar 298 K FJI‐H38 shows excellent trapping capability for C2H2 (1.64 mmol/g) CO2 (2.33 mmol/g), while uptake C2H4 only 0.41 mmol/g, endows...

Removing trace amounts of C2H2 from C2H2/C2H4 mixtures for C2H4 purification is crucial but extremely challenging. In this work, by introducing SiF62– with specific recognition C2H2, we constructed a robust adsorbent, FJI-W88, high adsorption capacity and excellent separation selectivity. FJI-W88 not only exhibits ultrahigh uptake at 0.01 bar (2.80 mmol g–1) also shows exceptional (1/99) IAST selectivity 698. Column breakthrough experiments further demonstrate that can obtain purity...

Considering the importance of C2H2 in industry, it is great significance to develop porous materials for efficient C2H2/CO2 separation. Besides high selectivity, adsorption capacity another vital factor However, "trade-off" between these two factors still perplexing. Rational pore design metal-organic frameworks (MOFs) has been proven be an effective way solve above problem. In this work, we have appropriately combined three kinds strategies MOF (FJI-H33), i.e., introduction open metal...

One-step purification of ethylene (C2H4) from ternary C2 hydrocarbon mixtures is a crucial task and an enduring challenge because their similar molecular size physical properties. Owing to intriguing structural dynamics, flexible MOFs have attracted more attention for gas adsorption separation. Herein, we report MOF FJI-W-66 that exhibits rarely seen "breathing" behaviors hydrocarbons. Upon activation, the channels guest-free FJI-W-66a significantly contract nearly closed-pore state. shows...

The dormitory and office are typical indoor environments in university. ventilation rate is one of significant effect on air quality. objectives this study to measure the rates dormitories offices summer winter, determine factors rate. In study, college student act as CO2 emission source; outdoor concentrations were measured same time. During sampling, size dormitory, number people their activity recorded. university calculated according concentrations. results showed that very inadequate...

The separation of C2-C3 alkyne/alkene mixtures is important but difficult work thanks to their similar physical and chemical properties. Crystalline porous materials with high alkyne adsorption prominent selectivity have been extensively investigated because energy-saving merits. Herein, we report a fluorinated hybrid microporous material (FJI-W1) that exhibits unexpected water thermal stability. Gas sorption isotherms show FJI-W1 has ultrahigh C2H2 C3H4 capacities 150 159 cm3/g,...

Abstract Design of flexible porous materials where the diffusion guest molecules is regulated by dynamics contracted pore aperture challenging. Here, a self‐assembly consisting 1D channels with dynamic bottleneck gates reported. The pendant naphthimidazolylmethyl moieties at channel necks provide kinetic gate function, that enables unusual adsorption for light hydrocarbons. CO 2 mainly dominated thermodynamics uptakes decreasing increasing temperature, whereas adsorptions larger hydrocarbons...

Abstract Rechargeable aqueous zinc‐ion batteries (RAZIBs) are attractive due to their affordability, safety, and eco‐friendliness. However, potential is limited by the lack of high‐capacity cathodes compatible electrolytes needed for reliable performance. Herein, we have presented a compatibility strategy development durable long‐lasting RAZIBs. The covalent organic frameworks (COFs) based on anthraquinone (DAAQ‐COF) created utilized as cathode, with zinc metal serving anode. electrolyte...

Abstract n ‐C 4 H 10 and iso are both important petrochemical raw materials. Considering the coexistence of isomers in production process, it is necessary to achieve their efficient separation through an economical way. However, obtain high‐purity one‐step developing ‐exclusion adsorbents with high adsorption capacity crucial. Herein, we report a cage‐like MOF (SIFSIX‐Cu‐TPA) small windows large cavities which can selectively allow smaller enter pore accommodate amount simultaneously....