On July 31, 2021, Si, Xue-Jian; Jia, Jing; Bao, Yu-Liang; Wu, Ya-Pan; Liu, Yunling; Dong, Wen-Wen; Zhao, Jun; Li, Dong-Sheng published an article.Safety of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid The title of the article was Superprotonic conductivity of a 3D anionic metal-organic framework by synergistic effect of guest [Me2NH2]+ cations, water molecules and host carboxylates. And the article contained the following:
A new 3D anionic metal-organic framework material, namely, [Me2NH2]2[Cd3(L)]·2H2O (1, H4L = 2,5′-di(3′,5′-dicarboxylphenyl)pyridine) has been synthesized under solvothermal conditions and characterized by single crystal x-ray diffraction, PXRD, thermogravimetric anal. and proton conduction investigation. In 1, the adjacent Cd(II) ions are joined to form a trinuclear [Cd3(COO)8] secondary building unit (SBU) by eight bridging carboxylate groups of L4- ligands. The trinuclear [Cd3(COO)8] SBUs are connected by L4- ligands into a 3D (4,8)-connected framework with 1D channels. Most interestingly, due to the guest [Me2NH2]+ cations, water mols. and carboxylates sites are lined the pore channels, 1 possesses a remarkable proton conductivity of 1.12 x 10-1 S cm-1 at 60° and 98% RH, which is comparable to com. available Nafion. The mechanism of proton conduction was also well discussed. The experimental process involved the reaction of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid(cas: 1431292-15-7).Safety of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid
The Article related to dicarboxylphenylpyridine cadmium metal organic framework preparation crystal mol structure, superprotonic conductivity three dimensional anionic metal organic framework, synergistic guest cation water mol host carboxylate and other aspects.Safety of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid