Demakov Pavel A, Bogomyakov Artem S, Urlukov Artem S, Andreeva Aleksandra Yu, Samsonenko Denis G, Dybtsev Danil N, Fedin Vladimir P
Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk 630090, Russia.
Department of Natural Sciences, Novosibirsk State University, Novosibirsk 630090, Russia.
Materials (Basel). 2020 Jan 19;13(2):486. doi: 10.3390/ma13020486.
Five trans-1,4-cyclohexanedicarboxylate (chdc) metal-organic frameworks of transition metals were synthesized in aqueous systems. A careful control of pH, reaction temperature and solvent composition were shown to direct the crystallization of a particular compound. Isostructural [Co(HO)(chdc)] () and [Fe(HO)(chdc)] () consist of one-dimensional hydrogen-bonded chains. Compounds [Cd(HO)(chdc)]∙0.5nCHCN (), [Mn(HO)(chdc)] () and [Mn(Hchdc)(chdc)] () possess three-dimensional framework structures. The compounds , and were further characterized by magnetochemical analysis, which reveals paramagnetic nature of these compounds. A presence of antiferromagnetic exchange at low temperatures is observed for while the antiferromagnetic coupling in is rather strong, even at ambient conditions. The thermal decompositions of , and were investigated and the obtained metal oxide (cubic CoO and MnO) samples were analyzed by X-ray diffraction and scanning electron microscopy.
在水体系中合成了五种过渡金属的反式 -1,4-环己烷二羧酸酯（chdc）金属有机框架材料。结果表明，仔细控制pH值、反应温度和溶剂组成可指导特定化合物的结晶。同构的[Co(H₂O)(chdc)]（）和[Fe(H₂O)(chdc)]（）由一维氢键链组成。化合物[Cd(H₂O)(chdc)]∙0.5nCH₃CN（）、[Mn(H₂O)(chdc)]（）和[Mn(Hchdc)(chdc)]（）具有三维骨架结构。化合物、和通过磁化学分析进一步表征，结果表明这些化合物具有顺磁性。对于，在低温下观察到反铁磁交换的存在，而即使在环境条件下，中的反铁磁耦合也相当强。研究了、和的热分解，并通过X射线衍射和扫描电子显微镜对所得金属氧化物（立方CoO和MnO）样品进行了分析。
