Hohenschutz Max, Grillo Isabelle, Diat Olivier, Bauduin Pierre
ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France.
Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38000, Grenoble, France.
Angew Chem Int Ed Engl. 2020 May 18;59(21):8084-8088. doi: 10.1002/anie.201916193. Epub 2020 Mar 3.
Recently, nanometric ions were shown to adsorb to hydrated neutral surfaces and to bind to the cavities of macrocyclic molecules with an unexpectedly strong affinity arising from a solvent-mediated effect named superchaotropicity. We show here that nano-ions at low concentrations (μm range), similarly to anionic surfactants, induce the spontaneous transformation of a swollen lyotropic lamellar phase of non-ionic surfactant into a vesicle phase. This transition occurs when the neutral lamellae acquire charges, either by adsorption of the nano-ions onto, or by anchoring of the ionic surfactant into the lamellae. In contrast to ionic surfactants, nano-ions strongly dehydrate the neutral surfactant assemblies. As a conclusion, these purely inorganic nanometric ions act as alternatives to the widely used organic ionic surfactants.
最近研究表明，纳米离子能吸附到水合中性表面，并以一种源于名为超离液性的溶剂介导效应的意外强亲和力，与大环分子的空腔结合。我们在此表明，低浓度（微米范围）的纳米离子，类似于阴离子表面活性剂，能诱导非离子表面活性剂的溶致液晶层状相自发转变为囊泡相。当中性层状结构通过纳米离子吸附或离子表面活性剂锚定到层状结构上而获得电荷时，就会发生这种转变。与离子表面活性剂不同，纳米离子会使中性表面活性剂聚集体强烈脱水。总之，这些纯无机纳米离子可作为广泛使用的有机离子表面活性剂的替代品。
