Adsorption, micellization and antimicrobial activity of formyl-containing cationic surfactant in diluted aqueous solutions
作者:Pingping Lu、Shuai He、Yue Zhou、Yongmin Zhang
DOI:10.1016/j.molliq.2020.115168
日期:2021.3
different hydrophobic chains, which can form dynamic imine bonds. The adsorption, micellization and antimicrobial activity were systematically investigated using surface tension, fluorescence, electrical conductivity, and ITC techniques. The results showed that the insertion of the 2-(4-formyl-phenoxy)ethyl group (equivalent to ~7 methylene groups) endows the surfactant with an asymmetrical double-chain
在过去的几十年中,由于共价键和非共价键的共存,基于动态共价键的表面活性剂引起了人们的极大兴趣。但是,对其前体的基本性质的研究很少。本文中,我们合成了一系列含甲酰基的阳离子表面活性剂(N-烷基-N,N带有不同疏水链的-二甲基-N-(2-(4-甲酰基-苯氧基)乙基)溴化铵,可以形成动态亚胺键。使用表面张力,荧光,电导率和ITC技术系统地研究了吸附,胶束化和抗菌活性。结果表明2-(4-甲酰基-苯氧基)乙基(相当于〜7个亚甲基)的插入使表面活性剂具有不对称的双链结构,增强了疏水相互作用。结果,临界胶束浓度(cmc)和每个亚甲基基团对胶束化的标准吉布斯自由能的贡献(∆ G m o与传统的单一表面活性剂相比,)明显降低。随着疏水链长度的增加,cmc,本体相中表面活性剂浓度的负对数将使溶剂的表面张力(pC 20)降低20 mN·m -1和最大表面过量。吸附的表面活性剂(Γ最大)均降低伴随着增加的最小分子占有面积(A分钟),而Δ
Dodecylamine-migration associated with the formation of double-chained amphiphilic imine induces the morphological transformation from micelles to giant vesicles.
十二烷胺迁移与双链两性亚胺形成相关,诱导从胶束到巨大囊泡的形态转变。
Construction of pH-Responsive Supramolecular Assemblies Based on Dynamic Covalent Bonds for Tunable Drug Release
propose a novel strategy for preparing supramolecular self‐assemblies for pH‐responsive drug delivery. In alkaline solutions, a novel supra‐amphiphile can be fabricated by a cationic surfactant dodecyl[2‐(4‐formylphenoxy)ethyl] dimethylammonium bromide (C12‐CHO) and a drug molecule (isonicotinic acid hydrazide) via a dynamic covalent bond. The constructed supra‐amphiphile can hierarchically self‐assemble