Abstract Sulphonamide compounds are present in many bioactive compounds owing to their multiple biological applications, even their metal complexes. The study reported in this paper focused on the synthesis of a sulphonamide ligand (Schiff base) and its Cu metal complex and their possible applications as antimicrobial and flame retardant additives in polyurethane formulations for surface coating application. Thus, selected divalent (Cu II) metal complex of 4-((E)-(4-hydroxy-3-((E)-(p-tolylimino)methyl) phenyl) diazenyl)-N-(5-methylisoxazol-3-yl) benzenesulphonamide was prepared and characterised using a combination of elemental analysis, Fourier Transform Infrared, Proton Nuclear Magnetic Resonance and mass spectroscopy. The prepared Schiff base ligand and its Cu metal complex were physically added to polyurethane varnish to give varnish coating formulations at a laboratory scale and then applied onto pretreated wood and steel panels using a brush. The oxygen index, Gram negative bacteria; Gram positive bacteria and fungi values obtained indicated that the polyurethane varnish that contained the prepared ligand and its Cu metal complex as additives exhibited very good flame retardant and antimicrobial properties, respectively. It was also found that the metal complex had outperformed the ligand. The physical and mechanical resistance of the coatings was also studied, in order to assess any disadvantages owing to the incorporation of the additives. It was found that the additives did not influence the flexibility, hardness and adhesion of coating films prepared using the polyurethane varnish. The gloss of the polyurethane varnish film was improved due to the incorporation of the aromatic ring into the formulation.

中文翻译：

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磺酰胺（席夫碱）配体及其铜金属配合物的合成和表征及其在聚氨酯清漆中作为阻燃和抗菌表面涂层添加剂的效率

摘要 磺胺类化合物由于其多种生物学应用，甚至是其金属配合物，因此存在于许多生物活性化合物中。本文报道的研究重点是磺酰胺配体（席夫碱）及其铜金属络合物的合成，以及它们在聚氨酯配方中作为抗菌和阻燃添加剂的可能应用，用于表面涂层应用。因此，选择了 4-((E)-(4-hydroxy-3-((E)-(p-tolylimino)methyl) phenyl) dizenyl)-N-(5-methylisoxazol-3) 的二价 (Cu II) 金属络合物使用元素分析、傅立叶变换红外、质子核磁共振和质谱的组合来制备和表征-yl)苯磺酰胺。将制备的席夫碱配体及其铜金属配合物物理添加到聚氨酯清漆中，以提供实验室规模的清漆涂料配方，然后使用刷子将其涂在预处理过的木材和钢板上。氧指数，革兰氏阴性菌；获得的革兰氏阳性细菌和真菌值表明含有制备的配体及其Cu金属配合物作为添加剂的聚氨酯清漆分别表现出非常好的阻燃和抗菌性能。还发现金属配合物的性能优于配体。还研究了涂层的物理和机械阻力，以评估由于加入添加剂而导致的任何缺点。发现添加剂不影响柔韧性，使用聚氨酯清漆制备的涂膜的硬度和附着力。由于在配方中加入了芳香环，聚氨酯清漆薄膜的光泽度得到改善。