论文部分内容阅读
文章利用琥珀酸酐对壳聚糖进行改性,并合成了两个新的配合物:sucts-Cu(Ⅱ)-hpb(1)和sucts-Cu(Ⅱ)-tbz(2)[sucts=琥珀酰化壳聚糖,hpb=2-(2’-吡啶)-苯并咪唑,tbz=2-(4′-噻唑基)苯并咪唑]。应用红外光谱,紫外-可见光谱,原子吸收光谱对配合物进行了表征,采用试管倍比稀释法研究了这些配合物对苏云金杆菌、枯草芽孢杆菌、大肠杆菌和金黄色葡萄球菌的抑制作用。结果表明,两种配合物对四种细菌均有较强的抑菌活性,配合物1、2,最小抑菌浓度(MIC)分别为62.5～125μg.mL-1和125～250μg.mL-1,抗菌效果明显强于自由配体。
In this paper, chitosan was modified with succinic anhydride and two new complexes were synthesized: sucts-Cu (Ⅱ) -hpb (1) and sucts-Cu (Ⅱ) -tbz Chitosan, hpb = 2- (2’-pyridine) -benzimidazole, tbz = 2- (4’-thiazolyl) benzimidazole]. The complexes were characterized by FTIR, UV-Vis, and atomic absorption spectroscopy. The inhibitory effects of these complexes on Bacillus thuringiensis, Bacillus subtilis, Escherichia coli and Staphylococcus aureus were studied by multiplicity dilution in vitro. The results showed that the two compounds had strong antibacterial activity against four kinds of bacteria. The MICs of the two compounds were 62.5 ~ 125μg.mL-1 and 125 ~ 250μg.mL-1 , Antibacterial effect was significantly stronger than the free ligand.