Stereochemical control of cis- and trans-TiCl2 groups in six-coordinate complexes [(L)TiCl2] (L2− = N2O2-donor Schiff base) and reactions with trimethylaluminium to form cationic aluminium species
合成了甲醇溶液中N 2 O 2-,N 2 O 3-和N 2 O 5施主席夫碱与Cu II离子的配合物。它们通过元素分析,X射线晶体学技术,光谱法(UV-Vis,IR)和热法(TG,TG-FTIR)表征。还研究了制备的配合物对过氧化氢辅助降解作为模型化合物的亚甲基蓝(MB)在水中的催化活性。获得的配合物为结晶固体。取决于席夫碱和Cu II的摩尔比在合成中使用的配体:它们可以形成单体或二聚体结构。在溶液状态和固态状态下,金属中心周围的配位环境都是稍微变形的正方形平面。在室温下确定的磁矩值表明存在反铁磁相互作用。该配合物在环境温度下稳定。加热后,首先溶剂化物损失溶剂分子;之后,有机部分会逐渐进行碎片整理和燃烧。在复合物存在下,MB的降解效率为68.18-97.47%。提出了以HO·自由基为氧化剂降解MB的初步机理。
The formation of a neutral manganese(III) complex containing a tetradentate Schiff base and a ketone – synthesis and characterization
作者:Agata Bartyzel、Agnieszka A. Kaczor
DOI:10.1080/00958972.2015.1073268
日期:2015.10.18
2-Benzoylphenolato-(2,2'-((2,2-dimethylpropane-1,3-diyl)bis((nitrilo)(phenylmethylidyne)))-diphenolato-manganese(III) methanol solvate, [Mn(C31H28N2O2)(C13H9O2)]center dot CH3OH (1), was synthesized and characterized by FTIR, UV-vis, TG-FTIR, TG/DSC, molar conductivity, magnetic moment measurement, and quantum chemical calculations. During the synthesis, partial hydrolysis of ligand is observed. The compound was obtained as amorphous, dark-brown powder. The effects of organic solvents of various polarities on the UV-vis spectra of ligands and complex were investigated. In addition, the IR and UV-vis spectra were also calculated and compared with the experimental data. A single crystal for analysis was obtained by dissolving the amorphous complex in methanol, and slow evaporation of solvent at 4 degrees C. Single-crystal X-ray analysis indicated that the methanol molecules are not incorporated into the crystal lattice after the recrystallization process ([Mn(C31H28N2O2)(C13H9O2)] (2)). In the structure Mn(III) is surrounded by two nitrogens and four oxygens of deprotonated Schiff base and alpha-hydroxy ketone ligands, and adopts a distorted octahedral geometry.