Synthesis,spectroscopic study,X-ray diffraction,and comparative antimicrobial study of Schiff bases based on o-toluidine and their Co(II) complexes

Schiff bases are versatile compounds for the design of the ternary complex. An experiment has been made to synthesize two novel complexes of Co(II). Here, The primary ligand, L₁ was prepared by the condensation reaction of o-toluidine with 3-formyl chromone or o-toluidine with 3- methylquinolinecarbaldehyde and the secondary ligand which was 8-Hydroxyquinoline. These potent complexes were prepared by condensation of primary and secondary ligands with Cobalt salt. The reaction was performed through the conventional reflux method. The newly synthesized chromone and quinoline derived novel compounds are proposed to have significant antimicrobial activity against selective strains of bacteria and fungi. This can be great opportunity for researchers and the use of biological applications of the synthesized novel compounds can be a part of unique field of research for the future to be focus. Chromone derivative has great biological diversity in the medicinal and pharmaceutical fields. Along with these compounds, quinoline derivatives also have antibacterial, and antifungal activities. The synthesized ligand and complex were characterized by elemental analysis, molecular weight determination, magnetic moment measurement, melting point determination, spectral analysis (IR, UV–Vis, ¹H NMR, Mass, etc.), and X-ray diffraction. The synthesized complexes were paramagnetic and non-electrolytic in nature. The Uv–Vis, FTIR, NMR, and Mass spectra suggest the octahedral geometry of the complexes. The synthesized compounds were further evaluated for biological studies against selected bacterial and fungal strains. It has been observed that the antimicrobial activity of most of the complexes are better than that of ligands.     

液质联用技术分析西洋参花化学成分及H9c2心肌细胞损伤保护作用

高温高压转化前后西洋参花醇提液经正己烷、氯仿、乙酸乙酯和正丁醇分级萃取后共得10种不同极性组分，通过H9c2心肌细胞损伤模型筛选最佳活性组分，并对其进行抗氧化活性的测定以及化学组成分析，利用液质联用技术检测其处理前后的化学成分。结果表明，提取的10种活性组分中，高温高压转化后西洋参花乙酸乙酯萃取层(PEE)能够有效保护H9c2心肌细胞损伤，显著提高细胞存活率并降低细胞ROS水平，与高温高压转化处理前西洋参花乙酸乙酯层(OEE)相较，二者总体皂苷含量相近且均具有较强的抗氧化活性。通过液质分析，初步确定了PEE中所含高温高压转化裂解生成的Rk₁与Rg₅更具良好的心肌细胞损伤保护作用。