The bifunctional linker 4-(3,5-dimethyl-1H-pyrazol-4-yl)benzoic acid (H2mpba) was used for the synthesis of new (square lattice) sql 2D metal-organic frameworks (MOFs) [Cu(Hmpba)2]∙L (L = DMF or ACN) in a solvent-mixture of...
The reaction of the N,O-heteroditopic bifunctional ligand 4-(3,5-dimethyl-1H-pyrazol-4-yl)benzoic acid (H2mpba) with Cu(NO3)2·2.5H2O and Zn(NO3)2·4H2O or Zn(CH3COO)2·2H2O in N,N-dimethylformamide (DMF) results in concomitant formation of three bimetallic metal-organic frameworks (MOFs) with...
A mixed-valent, one-dimensional Cu(I/II) coordination polymer with the formula [Cu II {Cu I 3 (Hmpba)(mpba) 2 }DMF] •~3DMF was obtained with the bifunctional ligand 4-(3,5-dimethyl-1H-pyrazol-4-yl)benzoic acid (H 2 mpba) in N,N-dimethylformamide (DMF) via solvothermal reaction. The compound exhibits a trinuclear {Cu I 3 (Hmpba)(mpba) 2 } 2À metallo-linker with the softer Cu(I) linearly-coordinated by the softer pyrazolate nitrogen donor atom. This metallo-linker connects the harder Cu(II) ions through its harder carboxylate groups into a chain structure. Two Cu(II) ions form a paddlewheel unit and are, thus, surrounded by four carboxylate groups. Cu(II) is five-coordinated with a terminal DMF ligand. Parallel chains are connected into supramolecular layers through the common R 2 2 (8) hydrogen-bond motif of the singly-deprotonated carboxyl groups of the Hmpba ligand. These layers are further organized by Cu(I)À Cu(I) interactions into a 3D supramolecular array.
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