Mononuclear coordination compounds containing a pyrazole-based ligand: Syntheses, magnetism and acetylcholinesterase inhibition assays
作者:Isac M. Dias、Henrique C.S. Junior、Sabrina C. Costa、Cristiane M. Cardoso、Antonio G.B. Cruz、Claudio E.R. Santos、Dalber R.S. Candela、Stéphane Soriano、Marcelo M. Marques、Glaucio B. Ferreira、Guilherme P. Guedes
DOI:10.1016/j.molstruc.2019.127564
日期:2020.4
by a hydrogen bond network while X-ray powder pattern, Raman and IR spectra indicated that compounds 1 and 3 are isomorphic. Mossbauer spectra recorded at 3 and 300 K for 1 showed that the FeII ion is in its high spin state. Magnetic studies carried out for complexes 1–2 showed the key role played by the zero-field splitting and the experimental fit data were correlated and supported by CASSCF calculations
摘要 一系列三个拟八面体配位化合物,通式为cis-[M(L)2(OH2)4],其中M代表FeII(1)、CoII(2)或NiII(3),HL为5 -amino-1-(benzo[d]thiazol-2-yl)-1H-pyrazole-4-carbic acid proligand 通过慢扩散方法合成,并通过光谱技术、磁性测量和 ab initio 计算彻底表征。1 和 2 的单晶 X 射线衍射数据表明,晶体堆积由氢键网络稳定,而 X 射线粉末图、拉曼和红外光谱表明化合物 1 和 3 是同构的。在 3 和 300 K 下记录的穆斯堡尔谱 1 表明 FeII 离子处于高自旋状态。对配合物 1-2 进行的磁学研究表明,零场分裂起到了关键作用,并且实验拟合数据得到了 CASSCF 计算的相关和支持。使用 Elman 方法研究乙酰胆碱酯酶对 L 和 1-3 的活性,抑制率分别为 20%、56%、35%