Crystalline solids with extended non-interpenetrating three-dimensional crystal structures were synthesized that support well-defined pores internal diameters of up to 48 angstroms. The Zn4O(CO2)6 unit was joined either one or two kinds organic link, 4,4',4''-[benzene-1,3,5-triyl-tris(ethyne-2,1-diyl)]tribenzoate (BTE), 4,4',44''-[benzene-1,3,5-triyl-tris(benzene-4,1-diyl)]tribenzoate (BBC), 4,4',44''-benzene-1,3,5-triyl-tribenzoate (BTB)/2,6-naphthalenedicarboxylate (NDC), and...

Metal–organic framework-177 (MOF-177) is one of the most porous materials whose structure composed octahedral Zn4O(−COO)6 and triangular 1,3,5-benzenetribenzoate (BTB) units to make a three-dimensional extended network based on qom topology. This topology violates long-standing thesis where highly symmetric building are expected yield networks. In case octahedron triangle combinations, MOFs pyrite (pyr) rutile (rtl) nets were instead qom. this study, we have made 24 MOF-177 structures with...

The concept and occurrence of isoreticular (same topology) series metal–organic frameworks (MOFs) is reviewed. We describe the preparation, characterization, crystal structures three new MOFs that are expansions known materials with tbo (Cu3(4,4′,4″-(benzene-1,3,5-triyl-tris(benzene-4,1-diyl))tribenzoate)2, MOF-399) pto topologies (Cu3(4,4′,4″-(benzene-1,3,5-triyl-tribenzoate)2, MOF-143; Cu3(4,4′,4″-(triazine-2,4,6-triyl-tris(benzene-4,1-diyl))tribenzoate)2, MOF-388). One these (MOF-399) has...

Separation of acetylene from carbon dioxide and ethylene is challenging in view their similar sizes physical properties. Metal-organic frameworks (MOFs) general are strong candidates for these separations owing to the presence functional pore surfaces that can selectively capture a specific target molecule. Here, we report novel 3D microporous cationic framework named JCM-1. This structure possesses imidazolium groups on pyrazolate as metal binding group, which well known form...

The functionalization of UiO-67 with -NH2 groups enhances CO2 and CH4 adsorption at 1 bar 298 K positively influences the framework's interaction water as evidenced by significant enhancement vapour 0.1 < P/P0 0.3 K.

Partial functionalization of the metal–organic framework, MIL-101, with –COOH groups is proven effective for enhancing water uptake capacity at low pressure.

Three functionalized metal–organic frameworks (MOFs), MOF-205-NH2, MOF-205-NO2, and MOF-205-OBn, formulated as Zn4O(BTB)4/3(L), where BTB is benzene-1,3,5-tribenzoate L 1-aminonaphthalene-3,7-dicarboxylate (NDC-NH2), 1-nitronaphthalene-3,7-dicarboxylate (NDC-NO2) or 1,5-dibenzyloxy-2,6-naphthalenedicarboxylate (NDC-(OBn)2), were synthesized their gas (H2, CO2, CH4) adsorption properties compared to those of the un-functionalized, parent MOF-205. Ordered structural models for MOF-205 its...

Abstract Separation of acetylene from carbon dioxide and ethylene is challenging in view their similar sizes physical properties. Metal–organic frameworks (MOFs) general are strong candidates for these separations owing to the presence functional pore surfaces that can selectively capture a specific target molecule. Here, we report novel 3D microporous cationic framework named JCM‐1 . This structure possesses imidazolium groups on pyrazolate as metal binding group, which well known form...

A new type of click reaction, sulfur(VI) fluoride exchange (SuFEx), has been utilized to prepare five postsynthetically modified UiO-67 series metal-organic frameworks (MOFs). The postsynthetic modification (PSM) via SuFEx can be achieved selectively for the sulfonyl (R-SO2F) without degrading MOF structure as confirmed by X-ray crystallographic analysis. present method provides a straightforward tool introducing functionality inside MOFs. Introduction an imidazolium group into afforded...

Two noble Ca-based metal–organic frameworks exhibit the largest surface areas and highest CO₂ adsorption capacity at 298 K 1 bar among MOFs reported so far.

A methyl-modified metal–organic framework (m-TiBDC) exhibiting significantly enhanced hydrostability than unmodified TiBDC maintains its structure and also CO₂ gas adsorption capacity even after immersion in water for 2 hours.

The first synthesis of macrocyclic α-ABpeptoids with varying lengths is described. X-ray crystal structures reveal that cyclic trimer displays a chair-like conformation cct amide sequence and tetramer has saddle-like structure an uncommon cccc arrangement. creation DNA-encoded combinatorial library

Nitrated metal–organic frameworks transform into carbon structures with highly dispersed metal through a deflagration process involving extremely anisotropic reaction propagation.

A fluorine-functionalized HKUST-1 (HKUST-1-F) has been synthesized by a solvothermal reaction between copper nitrate and potassium salt of 2-fluoro-1,3,5-benzenetricarboxylic acid (K[H2BTC-F]). HKUST-1-F shows nearly the same crystal structure as that UHM-31, known fluorinated HKUST-1. Because its reduced surface area, takes up smaller amounts gases (N2 , H2 CO2 ) than UHM-31 at 1 bar. After water vapor adsorption measurement 298 K, turned into an unknown structure, based on powder X-ray...

Four MOFs functionalized with 1-Me, 1-Pr, 1-Ph, and 1-<TEX>$PhCF_3$</TEX> were prepared through post-synthetic modifications of a metal-organic framework (MOF), UMCM-1-<TEX>$NH_2$</TEX> (1) acetic, butyric, benzoic, 4-(trifluoromethyl)benzoic anhydrides, respectively. Methane adsorption measurements between 253 298 K at pressures up to 1 bar indicated that both 1-Ph adsorbed more <TEX>$CH_4$</TEX> than the parent MOF, 1. All <TEX>$CO_2$</TEX> under conditions similar test. The introduction...

A highly sterically demanding amino triphenolate ligand was successfully synthesized, and early transition metal complexes (Ti, V, Cr, Mn) supported by the were also obtained fully characterized.

2-Methylimidazolate (mIm) connects the Zn₂ paddle-wheels in a <bold>pto</bold> type framework, leading to an anionic metal–organic framework.

Herein, we describe a new transition metal-free Claisen rearrangement for the synthesis of α-substituted 2,4-dienamides. The one-pot, stereoselective three-component cascade reaction between series propargyl alcohols, amines, and gem-difluorochloro ethane derivatives afforded various polysubstituted 2,4-dienamides in good yields. This synthetic method 1,1-captodative dienes, 2,4-dienamides, can be utilized preparing pharmaceutical analogues containing an indolin-2-one or lactone moiety.

A one‐dimensional (1D) metal‐organic caged framework ( YMOF‐Y ) was obtained via self‐assembly of yttrium cations with a U‐shape imidazolium based ligand and the structure elucidated by single‐crystal X‐ray diffraction analysis. The has unique 1D chain composed octa‐imidazolium cages. Inside cage, an inner Y 4 cluster connected to cage through formate anions is present. microporosity flexibility can be improved unprecedented postsynthetic removal clusters from washing alkali metal solutions....

Porous aromatic frameworks, Nitro groups, Gas adsorption, Carbon dioxideLinking of rigid organic molecules by coupling and/orcondensation reactions can yield extended polymernetworks usually as amorphous solids except for the COFs(covalent frameworks) developed Yaghi and co-workers.