Antibacterial Activities of Five Cationic Gemini Surfactants with Ethylene Glycol Bisacetyl Spacers
作者:Shengnan Guo、Xiaowen Sun、Qichao Zou、Jinzhi Zhang、Hong Ni
DOI:10.1007/s11743-014-1620-3
日期:2014.11
A series of cationic gemini surfactants containing two dimethylalkylammonium chains linked by ethylene glycol bisacetyl spacers were synthesized [Gm‐AnA‐m, G = gemini surfactant, m = 12 (–C12H25), 14 (–C14H29), or 16 (–C16H33), A = acetyl, and n = 2, 3, or 4 is the number of ethylene glycol units in the spacers]. Because of the inductive effect of the oxygen atom in the spacer, acylation can take place
一系列含有由乙二醇bisacetyl间隔物连接的两个dimethylalkylammonium链合成阳离子双子表面活性剂[G米-A Ñ A-米,G =双子表面活性剂,米= 12(-C 12 H ^ 25),14(-C 14 ħ 29)或16(–C 16 H 33),A =乙酰基,n= 2、3或4是垫片中的乙二醇单元数]。由于间隔物中氧原子的感应作用,可以使用氯乙酰氯代替溴乙酰溴来进行酰化反应,这有助于限制对环境有害的试剂的使用。使用电导率测量确定临界胶束浓度。表面活性剂对革兰氏阳性菌金黄色葡萄球菌和革兰氏阴性菌大肠杆菌的抗菌活性从最小抑菌浓度(MIC),最小细菌浓度,时间杀灭研究和抑菌圈进行评估。增加间隔物的长度不会导致明显的抗菌活性变化。然而,增加烷基链的长度显然增加了对金黄色葡萄球菌的抗菌活性,但是降低了对大肠杆菌的抗菌活性。对于g 12-A2A-12表面活性剂具有1.26毫摩尔L中的最低CMC