Metal-Organic Frameworks Of Tetrazolyl Derivative Ligands: Syntheses, Structures, And Properties

Metal–organic frameworks (MOFs) has recently attracted considerable interest, owing to their versatile framework topologies as well as their potential applications as functional materials in molecular magnetism, catalysis, gas sorption, fluorescent sensing, and optoelectronic devices. The tetrazolyl functional group has found a wide range of applications in coordination chemistry as ligands, in pharmaceuticals as a metabolically stable surrogate for a carboxylic acid group, in photography and information recording systems, and in materials science as high-density energy materials. In this paper, we using 1,3,5-benzenetristertrazolate and different metal ions in different conditions abtain six metal-organic frameworks. According to investigation, It is found that it is crucial for syntheses of metal-organic frameworks to control the ratio of metal ions and BTT ligands. Furthermore, magnetic properties and N2 adsorption have also been studied. The main contents are summarized as below:1. We have successfully synthesized two novel isostructural compounds by combining polytetrazolate rigid ligand. Theμ3-OH group linked MII (Zn and Mn) atoms to form interesting 2D layers structure and the BTT bridged adjacent layers to give a 3D network with tetranuclear metal-oxygen clusters and 16-membered metallocycles. The most intriguing feature is that metal atoms act as linkers to bridge the metal-oxygen clusters. In addition, the photoluminescent property of 1 was also investigated, the maximum emission of compound 1 exhibits a great red-shift (about 67 nm) in comparison with the free ligands. The magnetic property of 2 studied indicates that antiferromagnetic interactions exist between neighbouring Mn (II) ions.2. We have successfully constructed a 3D chiral microporous (10,3)-a topology metal–organic framework based on binuclear cobalt units and H3BTT ligands. Noteworthily, complex 3 exhibits large chiral channels of 17.43 and a high solvent-accessible volume (calculated 79%). In addition, the gas adsorption experiments of N₂ and magnetic property of 3 have been investigated.3. Three new compounds, [Zn(HBTT)]·2DMA (4), [Zn₂(BTT)(OH)(H₂O)]·CH3OH·3DMA (5), [Zn(DMA)₆][Zn₆(HBTT)₆]·CH3OH·5DMA·6H₂O (6), have been solvet synthesized on the basis of 1,3,5-benzenetristertrazolate and metal zinc ions. Compound 4 displays a 3D noninterpenetrating with 1D rhombus chnnels based on (3,6)-connected net. Compound 5 displays a 3D noninterpenetrating with carbon nanotubes sructure based on (4,4)-connected net. Compound 6 displays a 3D noninterpenetrating net with dumbbell-like mesoporous cages based on (3,6)-connected net.