Assembly of [Cu₂(COO)₄] and [M₃(μ₃-O)(COO)₆] (M = Sc, Fe, Ga, and In) building blocks into porous frameworks towards ultra-high C₂H₂/CO₂and C₂H₂/CH₄separation performance

Abstract

A porous MOF platform (SNNU-65s) formed by creatively combining paddle-wheel-like [Cu(COO)] and trigonal prismatic [M(μ-O)(COO)] building blocks was designed herein. The mixed and high-density open metal sites and the OH-functionalized pore surface promote SNNU-65s to exhibit ultra-high CH uptake and separation performance. Impressively, SNNU-65-Cu-Ga stands out for the highest CH/CO (18.7) and CH/CH (120.6) selectivity among all the reported MOFs at room temperature.

Recent Advances in Zeolite‐like Cluster Organic Frameworks

“…Therefore, the design of ZCOFs based on mixed types of metal clusters remains ag reat challenge. [131,132] Recently,Z hang et al reported aZ COF containing two kinds of tetrahedral metal clusters, at etrahedral [Cu 4 I 4 (ina) 4 ] 4À (ina = isonicotinic acid) cluster and ad istorted tetrahedral paddlewheel Mn 2 (COO) 4 (H 2 O)(dmf) cluster ( Figure 8). The [Cu 4 I 4 (ina) 4 ] 4À and Mn 2 (COO) 4 (H 2 O)(dmf) clustersb oth act as tetrahedral 4-connected nodes interconnected by ina ligandst of ormatwofold interpenetrated dia-type framework with large channels that are approximately 6.0 4.5 2 in size.…”

“…However, it is hard to control the reaction conditions to integrate two different tetrahedral metal clusters into one structure, because different metal clusters enjoy their own distinct chemical environments (e.g., acidic, basic, neutral, hydrophilic, oleophilic, etc.). Therefore, the design of ZCOFs based on mixed types of metal clusters remains a great challenge . Recently, Zhang et al.…”

Precise Pore Space Partitions Combined with High‐Density Hydrogen‐Bonding Acceptors within Metal–Organic Frameworks for Highly Efficient Acetylene Storage and Separation

“…[10] Even combined with accessible functional sites such as OMSs, LBSs,orHBAs, smaller pore sizes (< 5.0 )primarily help to enhance C 2 H 2 /CO 2 selectivity, [7,11] but larger pore sizes (> 7.5 )t end to enable high C 2 H 2 uptake capacity (Figure 1). [5,12] So the development of strategies to precisely regulate the pore sizes of MOFs within the range of about 5.0-7.5 may be an effective route to break through the trade-off barrier between C 2 H 2 storage and C 2 H 2 /CO 2 separation.…”

A luminescent Cd(ii) coordination polymer as a multi-responsive fluorescent sensor for Zn2+, Fe3+ and Cr2O72− in water with fluorescence enhancement or quenching

“…19 CPs as a type of promising functional materials have received considerable attention because of their intriguing structural features as well as applications in luminescence sensing, magnetic property, gas storage, drug delivery, and so on. [20][21][22][23][24][25][26][27][28] Particularly, CPs as uorescent sensors have drew more concern owing to their superiority in long-term stability, efficiency, and operability. Simultaneously, much effort has been made to synthesize uorescent CP materials for detecting different types of target analytes, such as metal ions, 29,30 anions, 31,32 and small molecules.…”