单核过渡金属 cymantrenecarboxylates 作为尖晶石型锰酸盐的前驱体。

Mononuclear Transition Metal Cymantrenecarboxylates as Precursors for Spinel-Type Manganites.

作者信息

Koroteev Pavel S, Ilyukhin Andrey B, Gavrikov Andrey V, Babeshkin Konstantin A, Efimov Nikolay N

机构信息

N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 31, 119991 Moscow, Russia.

出版信息

Molecules. 2022 Feb 6;27(3):1082. doi: 10.3390/molecules27031082.

DOI:10.3390/molecules27031082

PMID:35164348

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8838078/

Abstract

Novel mononuclear cymantrenecarboxylate complexes of transition metals, Co(HO)·4HO (Cym = (η-CH)Mn(CO)) (), Ni(HO)·4HO (), Zn(HO)·4HO (), [Co(CymCO)(imz)] (imz = imidazole, ), [Co(CymCO)(bpy)]·2PhMe (bpy = 2,2'-bipyridyl, ), [Ni(CymCO)(bpy)(HO)][CymCO]·0.5MePh·2HO (), [Cu(CymCO)(imz)] (), and [Cu(CymCO)(bpy)(HO)] (), were obtained and characterized by single-crystal X-ray analysis. Complexes - are isostructural. Magnetism of the Co complexes , , and was studied; it was shown that they exhibit the properties of field-induced single-molecule magnets with magnetization reversal barriers (ΔE/k) of 44, 13, and 10 K, respectively. Thermal decomposition of complexes - was studied by means of DSC and TGA methods. The final products of thermolysis of - in air, according to powder XRD data, are the pure spinel phases MMnO; for the cases of copper complexes, the mixtures of CuMnO and CuO were found in the products.

摘要

新型过渡金属单核环戊二烯基羧酸酯配合物，Co(H₂O)·4H₂O（Cym = (η⁵-C₅H₅)Mn(CO)₂）（），Ni(H₂O)·4H₂O（），Zn(H₂O)·4H₂O（），[Co(CymCO)(imz)]（imz = 咪唑，），[Co(CymCO)(bpy)]·2PhMe（bpy = 2,2'-联吡啶，），[Ni(CymCO)(bpy)(H₂O)][CymCO]·0.5MePh·2H₂O（），[Cu(CymCO)(imz)]（），以及[Cu(CymCO)(bpy)(H₂O)]（），通过单晶X射线分析获得并进行了表征。配合物 - 是同构的。研究了钴配合物、和的磁性；结果表明它们表现出场诱导单分子磁体的性质，其磁化反转势垒（ΔE/k）分别为44、13和10 K。通过DSC和TGA方法研究了配合物 - 的热分解。根据粉末XRD数据， - 在空气中热解的最终产物是纯尖晶石相MMnO₄；对于铜配合物的情况，在产物中发现了CuMnO₄和CuO的混合物。