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Integrating metal-organic frameworks (MOFs) with transition hydroxides has the potential to enhance the inadequate electronic conductivity and address the slow diffusion of MOF materials in electrochemical applications. Herein, we synthesized a 2D Cu-MOF and successfully prepared a Cu-MOF@Co(OH) 2 heterostructure using a one-step hydrothermal method on a Co(OH) 2 /NF (nickel foam) substrate. The hybrid Cu-MOF@Co(OH) 2 material exhibits high electrochemical reactivity, resulting in enhanced pseudocapacitor performance, with a specific capacitance of 2039.8 mF cm−2 at a current density of 1.0 mA cm−2. In addition, an asymmetric two-electrode cell was constructed using Cu-MOF@Co(OH) 2 /NF and activated carbon (AC)/NF, exhibiting a specific capacitance of 444.5 mF cm−2 at a current density of 1.0 mA cm−2, and demonstrating decent cycling durability with 90.1 % retention after 2000 cycles. One 2D Cu-MOF with MOF-110 analogs has been obtained and crystallographically characterized. The Cu-MOF@Co(OH) 2 heterostructure acted as asymmetric supercapacitor electrode material, which delivered enhance pseudocapacitor performance. Besides, the asymmetric two-electrode Cu-MOF@Co(OH) 2 //AC devices possessed the good specific capacitance and cycling durability. [Display omitted] • One 2D Cu-MOF with MOF-110 analogs has been synthesized and crystallographically characterized. • The Cu-MOF@Co(OH) 2 hybrid material has been fabricated, characterized and showed enhanced pseudocapacitor performance. • The asymmetric two-electrode Cu-MOF@Co(OH) 2 //AC devices possessed the good specific capacitance and cycling durability. [ABSTRACT FROM AUTHOR]

Three new coordination polymers, namely, {[Ni(H 2 L)(bix)(H 2 O) 2 ]·2h 2 O} n (1), {[Ni(HL)(Hdpa)(H 2 O) 2 ]·H 2 O} n (2), {[Ni(L) 0.5 (bpp)(H 2 O)]·H 2 O} n (3) (H 4 L=terphenyl-2,2′,4,4′-tetracarboxylic acid; bix=1,4-bis(imidazol-1-ylmethyl)benzene; dpa =4,4′-dipyridylamine; bpp=1,3-bis(4-pyridyl)propane), based on rigid H 4 L ligand and different N-donor co-ligands, have been synthesized under hydrothermal conditions. Compound 1 features a 3D 4-connected 6 6 -dia- type framework with H 4 L ligand adopts a μ 2 -bridging mode with two symmetry-related carboxylate groups in μ 1 - η 1 : η 0 monodentate mode. Compound 2 displays a 1D [Ni(HL)(Hdpa)] n ribbon chains motif, in which the H 4 L ligand adopts a μ 2 -bridging mode with two carboxylate groups in μ 1 - η 1 : η 1 and μ 1 - η 1 : η 0 monodentate modes, while 3 possesses a (4,4)-connected 3D frameworks with bbf topology, with H 4 L ligand displays a μ 4 -bridging coordination mode. The H 4 L ligand displays not only different deprotonated forms but also diverse coordination modes and conformations. The structural diversities among 1 – 3 have been carefully discussed, and the roles of N-donor co-ligands in the self-assembly of coordination polymers have been well documented. [ABSTRACT FROM AUTHOR]

The utilization of porous metal-organic frameworks (MOFs) as catalyst support has attracted intensive attentions in heterogeneous catalysis. However, the study of structure-activity relationship in this confined catalysis system is still scarce. Herein, three isostructural Co(II)-MOFs {Co 2 L(bpy)} n (CTGU-11), {Co 2 L(bpe)} n (CTGU-12) and {Co 2 L(bib)} n (CTGU-13) were synthesized by using 4,4′,4″,4‴-(1,3,6,8-Pyrenetetrayl)tetrabenzoic acid (H 4 L) as an organic ligand, and introducing three N-donor ligands (bpy ​= ​4,4′-dipyridyl, bpe ​= ​1,2-di(4-pyridyl)ethylene, bib ​= ​1,4-bis(1-imidazoly)benzene) with different length. Among these Co(II)-MOFs, each L4− anion bridges four typical paddle wheel secondary building units (SBUs) to form a two dimensional (2D) sheet, which further expanded to the three-fold interpenetrated structure with the aid of different pillared ligands. Inspired by the eligible structure/surface feature of these frameworks, a series of Co-MOF-supported heterogeneous catalysts (NM@Co-MOFs, NM = Ag, Ru, Pd and Au) have been fabricated successfully via solution infiltration, for the reduction of 4-nitrophenol (4NP). Impressively, 2-Ru@Co-MOFs exhibit remarkable activity in comparison to other NM@Co-MOFs composites with the apparent rate constant reach 50.72 ​s-1 ​g-1, 26.14 ​s-1 ​g-1, and 22.79 ​s-1 ​g-1, respectively. Furthermore, the possible catalytic mechanism of 2-Ru@Co-MOFs has also been discussed based on the analysis of reaction kinetics. Three isostructural Co(II)-MOFs were synthesized by using a conjugated tetrabenzoic acid(H 4 L) as an organic ligand, and introducing three N-donor ligands with different length. Among these Co(II)-MOFs, each L4− anion bridges four typical paddle wheel secondary building units (SBUs) to form a two dimensional (2D) sheet, which further expanded to the three-fold interpenetrated structure with the aid of different pillared ligands. Inspired by the eligible structure/surface feature of these frameworks, a series of Co-MOF-supported heterogeneous catalysts (NM@Co-MOFs, NM = Ag, Ru, Pd and Au) have been fabricated successfully via solution infiltration, for the reduction of 4-nitrophenol. [Display omitted] • Three novel isostructural 3D Co(II)-MOFs have been prepared. • The integration metal nanoparticles into MOFs shows positive effect on reduction of 4-NP. • The electronic effects between noble metal and MOFs accelerate catalytic process. [ABSTRACT FROM AUTHOR]

Four new isostructural coordination polymers, [M 2 (μ 2 -H 2 O)(DTBC) 2 ] (CTGU- 26(M), M ​= ​Zn, Cd, Co and Ni] have been prepared with a new butterfly-typed nitroheterocyclic 4,6-di- 1H-1,2,4-triazol-1-yi-1,3-benzenedicarboxylic acid(H 2 DTBC) ligand and metal salts under hydrothermal condition. CTGU-26(Zn) features an unusual 2-nodal (4, 8)-connected scu topological network generated by [Zn 2 (μ 2 -H 2 O)(COO) 4 ] units and DTBC2− anion linkers. Luminescent properties measurements indicate that both CTGU-26(Zn) and CTGU-26(Cd) show intense fluorescence-emission compared with free H 2 DTBC ligand in solid state. Moreover, the electrocatalytic activities of CTGU-26(Co) and CTGU-26(Ni) towards methanol oxidation reaction (MOR) of two compounds were also investigated. Remarkably, by combining each MOF with the conductive 2,3,6,7,10,11-hexahydroxytriphenylene(HHTP) additive, a composite material, HHTP/CTGU-26(Ni)–I was confirmed to have an excellent performance for MOR with a high mass specific peak current of 25.55 ​mA ​cm−2. Four new isostructural coordination polymers, [M 2 (μ 2 -H 2 O)(DTBC) 2 ] (CTGU-26(M), M ​= ​Zn, Cd, Co and Ni] have been prepared with one new butterfly-typed nitroheterocyclic carboxylate ligand was prepared and characterized. And the luminescent properties and methanol oxidation reaction were also discussed. [Display omitted] • Four new isostructural coordination polymers have been prepared with a new butterfly-typed nitroheterocyclic carboxylic acid. • They feature an unusual 2-nodal (4,8)-connected scu topological network generated by binuclear units and DTBC2− anion linkers. • The luminescent properties and the electrocatalytic MOR activities of four complexes has been studied and discussed. [ABSTRACT FROM AUTHOR]