作者通过几种有机方法描述了两种不同的五元杂环衍生物(噻唑和噻二唑)的合成和表征。这些化合物通过FTIR,1 H NMR和元素分析进行表征。而且,作者试图通过失重技术研究这些衍生物对硝酸介质中铜腐蚀的抑制作用。讨论了影响这些衍生物抑制效率的温度因子。而且,抑制效率取决于分子上变化的取代基。从结果发现,噻二唑抑制剂比噻唑抑制剂具有更高的抑制效率。
Being the important organic reaction intermediates and biological scaffolds, a series of 2-alkyl/aralkyl/ heterocyclyl sulfanyl-5-amino/methyl-1,3,4-thiadiazoles have been synthesized by suitable synthetic route and characterized by analytical and spectral data. The evaluation of these compounds for their bioefficacy against two phyto-pathogenic fungi revealed their fungicidal potency against Rhizoctonia bataticola (ED50 values, 3.9-300.4 mu g/mL) and Rhizoctonia solani (ED50 values, 4.2-228.5 mu g/mL). To further augment their fungicidal efficacy, the potent five fungicidal compounds were nano-sized. The protocol for preparing 1,3,4-thiadiazole based nano-fungicide employing polyethylene glycol was developed and standardized. Characterization of nano-forms of 1,3,4-thiadiazole derivatives by particle size analyzer and electron microscopy (TEM) techniques confirmed the <100 nm average particle sizes of all nano-fungicides. The 2-4 times higher fungicidal activity was observed with nano-forms than the corresponding conventional sized 1,3,4-thiadiazole derivatives against phytopathogenic fungi, namely, Rhizoctonia solani and R. bataticola. (C) 2020 Elsevier B.V. All rights reserved.