论文标题
3D水的限制：H2O表现出远距离（> 50 nm）的结构，而D2O不展示
3D confinement of water: H2O exhibits long-range (> 50 nm) structure while D2O does not
论文作者
论文摘要
由于其三维自适应氢（H）键网络，水是生命的液体。该网络的限制可能会导致急剧的结构变化，从而影响化学和物理转化。尽管限制效应发生在<1 nm的长度尺度上，但上限尺度限制尚不清楚。在这里，我们研究了3D限制的长度尺度，范围为58-140 nm。通过限制不同大小的zwittionic脂质体中的水，并使用第二谐波散射（SHS）测量H键网络构象的变化，我们确定了在轻和重水中的长距离限制效应。 D2O显示未检测到的3D-confinement效应<58 nm（<3.10^6 d2o分子）。 H2O截然不同：与外部网络相比，囊泡封闭的内部H键网络具有不同的构象，并且SHS响应尺度与限制空间的体积相比。 H2O显示距离> 140 nm（> 4.10^7 H2O分子）的限制效应。
Water is the liquid of life, thanks to its three-dimensional adaptive hydrogen (H)-bond network. Confinement of this network may lead to dramatic structural changes that influence chemical and physical transformations. Although confinement effects occur on a < 1 nm length scale, the upper length scale limit is not known. Here, we investigate 3D confinement over lengths scales ranging from 58 - 140 nm. By confining water in zwitterionic liposomes of different sizes and measuring the change in H-bond network conformation using second harmonic scattering (SHS) we determined long range confinement effects in light and heavy water. D2O displays no detectable 3D-confinement effects < 58 nm (< 3.10^6 D2O molecules). H2O is distinctly different: The vesicle enclosed inner H-bond network has a different conformation compared to the outside network and the SHS response scales with the volume of the confining space. H2O displays confinement effects over distances > 140 nm (> 4.10^7 H2O molecules).
