Tuning Crystal Packing and Magnetic Properties in a Series of [Dy<sub>12</sub>] Metallocubanes Based on Azobenzene Derivatives of Salicylic Acid
作者:Ivan V. Khariushin、Alexander S. Ovsyannikov、Daut R. Islamov、Aida I. Samigullina、Svetlana E. Solovieva、Jakub J. Zakrzewski、Szymon Chorazy、Sylvie Ferlay
DOI:10.1021/acs.inorgchem.3c00433
日期:2023.7.10
A series of four new Dy12 dodecanuclear clusters based on azobenzene derivative ligands of salicylicacid (L1–L4) has been synthesized and characterized in the crystalline phase using X-ray diffraction on single crystal and powder, IR spectroscopy, elemental analysis, and DSC–TGA methods. It was revealed that all obtained clusters exhibit the formation of the similar metallic cluster nodes, as vertex-sharing
合成了一系列基于水杨酸偶氮苯衍生物配体 ( L1 – L4 ) 的新型 Dy 12十二核簇,并使用单晶和粉末 X 射线衍射、红外光谱、元素分析和 DSC-TGA 方法在晶相中进行了表征。结果表明,所有获得的簇都表现出相似的金属簇节点的形成,作为顶点共享的杂立方烷,由四个 Dy 3+阳离子、三个桥接羟基和来自水杨酸配体的 O 原子获得。Dy(III) 中心周围的配位几何形状已被仔细分析。而Dy 12 -L1和Dy 12 -L2对于Dy 12 -L3,其中L1和L2在苯环的对位分别含有Me和OMe基团,由于CH−π相互作用,形成类似的多孔3D类金刚石分子网络,对于Dy 12 -L3 ,其中L3带有NO 2 -吸电子基团,观察到通过 π-π 堆叠组装的 2D 分子网格的生成,并且对于带有L4的苯基取代基的Dy 12 -L4,已经生成了 3D 六边形通道。配合物Dy 12 -L1、Dy 12 -L2和Dy
Synthesis and characterization of triorganotin(IV) complexes of 5-[(E)-2-(aryl)-1-diazenyl]-2-hydroxybenzoic acids.
作者:Tushar S Basu Baul、Sushmita Dhar、Simon M Pyke、Edward R.T Tiekink、Eleonora Rivarola、Ray Butcher、Frank E Smith
DOI:10.1016/s0022-328x(01)01024-5
日期:2001.8
The triphenyltin and tri-n-butyltin complexes of some 5-[(E)-2-(aryl)-1-diazenyl]-2-hydroxybenzoic acids have been synthesized and characterized by 1H-, 13C-, 119Sn-NMR, IR and 119mSn Mössbauer spectroscopic techniques in combination with elemental analysis. The crystalstructures of triphenyltin 5-[(E)-2-(aryl)-1-diazenyl]-2-hydroxybenzoates (aryl=phenyl, 2-methylphenyl, 3-methylphenyl and 4-methoxyphenyl)
Synthesis, characterization and radical scavenging activity of aromatic amine conjugates of 5-aminosalicylic acid
作者:K. Harveer、S. Jasmeen
DOI:10.4314/bcse.v28i3.17
日期:——
5-Aminosalicylic acid is an anti-inflammatory drug used in the treatment of inflammatory bowel diseases including ulcerative colitis and Crohn’s disease. Due to its rapid and extensive absorption in the upper gastro-intestinal tract, substantial amount of 5-aminosalicylic acid is already lost before reaching the site of action, i.e. the colon. In order to prevent this loss of drug, carrier linked prodrug approach has been used and azo prodrugs have been synthesized with a purpose of colon targeting. The present research describes the synthesis and characterization of azo prodrugs of 5-aminosalicylic acid with aromatic amines. The synthesized prodrugs were tested for antioxidant activity using DPPH (2,2-diphenyl-1-picrylhydrazyl) free radical scavenging activity. All the synthesized compounds were found to possess mild to moderate radical scavenging activity.