作者:Friederike M. Mansfeld、Guoqiang Feng、Sijbren Otto
DOI:10.1039/b910197g
日期:——
Few methods currently exist for controlling vesicle–vesicle adhesion. We now report a new system, based upon a multivalent guest and an amphiphilic receptor with a photo-isomerisable anchor that can be incorporated into lipid vesicles of different sizes. Large unilamellar vesicles containing our receptor were found to aggregate upon addition of the multivalent guest, independently of photoswitching between the two conformations of the anchor. However, for giant vesicles immobilised on a platinum wire, guest-mediated adhesion only occurred upon photo-isomerisation of the anchor. This behaviour was attributed to the dynamics introduced into the system through the conformational changes caused by irradiation.
目前控制囊泡-囊泡粘附的方法较少。我们现在报告了一种新系统,基于多价的客体和一种具有光异构化锚点的两亲受体,该受体可以被纳入不同尺寸的脂质囊泡中。实验发现,含有我们受体的大单层囊泡在加入多价客体后会聚集,此过程与锚点的两种构象之间的光切换无关。然而,在固定在铂线上的巨型囊泡中,客体介导的粘附仅在锚点发生光异构化时才会发生。这种行为归因于通过辐照引起的构象变化为系统引入的动力学。