| 儿茶素-稀土配合物的合成、表征及抗菌活性 |
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| 引用本文： | 余康,田翠翠,李霞,廖学品,石碧. 儿茶素-稀土配合物的合成、表征及抗菌活性[J]. 物理化学学报, 2018, 34(5): 543-550. DOI: 10.3866/PKU.WHXB201709291 |
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| 作者姓名： | 余康 田翠翠 李霞 廖学品 石碧 |
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| 作者单位： | 1 四川大学生物质与皮革工程系，成都6100652 四川大学，皮革化学与工程教育部重点实验室，成都6100653 四川大学，制革清洁技术国家工程实验室，成都610065 |
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| 基金项目： | the National Technology Improvement and Industrialization Project of Fundamental Materials, China |
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| 摘 要： | 以稀土(Re3+)和儿茶素(C)为原料，由液相合成法制备了3种(La3+-C、Gd3+-C、Er3+-C)配合物，结合傅里叶变换红外光谱、紫外光谱、X射线光电子能谱及配位数测定对配合物结构进行表征，确定了配合物的配位数为8。并采用牛津杯法、最小抑菌浓度(MIC)及最小杀菌浓度(MBC)等三种方法测定了Re3+-C对大肠杆菌、金黄色葡萄球菌、绿脓杆菌、沙门氏菌4种食源性细菌的抗菌性能。结果表明，这3种稀土配合物对各试验菌株均表现不同程度的抑制能力，相较Re3+和C而言，Re3+-C配合物的抑菌性能均有显著的提高。Re3+-C的抑菌活性顺序为：Gd3+-C > La3+-C > Er3+-C，其中Gd3+-C对4种细菌的MIC值分别为：1.550、0.097、0.780、1.550 μmol·mL−1，MBC值分别为3.100、0.194、1.550、1.550 μmol·mL−1，Gd3+-C对金黄色葡萄球菌表现出最佳的抑菌和杀菌能力。
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| 关 键 词： | 儿茶素 稀土 配合物 食源性细菌 抗菌活性 |
| 收稿时间： | 2017-07-31 |
Synthesis,Characterization, and Antibacterial Activity of Rare Earth-Catechin Complexes |
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| Kang YU,Cuicui TIAN,Xia LI,Xuepin LIAO,Bi SHI. Synthesis,Characterization, and Antibacterial Activity of Rare Earth-Catechin Complexes[J]. Acta Physico-Chimica Sinica, 2018, 34(5): 543-550. DOI: 10.3866/PKU.WHXB201709291 |
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| Authors: | Kang YU Cuicui TIAN Xia LI Xuepin LIAO Bi SHI |
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| Affiliation: | 1. Department of Biomass and Leather Engineering, Sichuan University, Chengdu 610065, P. R. China;2. Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, P. R. China;3. National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, P. R. China |
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| Abstract: | Three kinds of novel coordination compounds [Re3+-C] (Re = La, Gd, Er; C = Catechin) were synthesized by the liquid-phase method, and characterized by Fourier transform infrared (FT-IR) spectroscopy, ultraviolet-visible (UV) spectrophotometry, X-ray photoelectron spectroscopy (XPS), and coordination number determination. The results indicated that the coordination number of the complexes is 8. Moreover, the antibacterial activities of Re3+-C against Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Salmonella were evaluated by the Oxford cup, minimum inhibition concentration (MIC), and minimum bactericidal concentration (MBC) approaches. Compared with Re3+ and C, the as-prepared complexes exhibited excellent antimicrobial activity toward the four strains. The MIC of Gd3+-C to these food-borne bacteria was 1.550, 0.0968, 0.775, and 1.550 μmol·mL−1, respectively, while the corresponding MBC values were 3.100, 0.194, 1.550, and 1.550 μmol·mL−1. It is clear that the Gd3+-C complex showed the best antibacterial and germicidal activity against S. aureus. |
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| Keywords: | Catechin Rare earth Complex Food-borne bacteria Antibacterial activity |
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