Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
Science. 2011 Jul 29;333(6042):613-6. doi: 10.1126/science.1206376.
Water normally exists in hydrogen-bonded environments, but a single molecule of H(2)O without any hydrogen bonds can be completely isolated within the confined subnano space inside fullerene C(60). We isolated bulk quantities of such a molecule by first synthesizing an open-cage C(60) derivative whose opening can be enlarged in situ at 120°C that quantitatively encapsulated one water molecule under the high-pressure conditions. The relatively simple method was developed to close the cage and encapsulate water. The structure of H(2)O@C(60) was determined by single-crystal x-ray analysis, along with its physical and spectroscopic properties.
水通常以氢键环境存在，但单个 H(2)O 分子在富勒烯 C(60)的受限亚纳米空间内可以完全被隔离。我们通过首先合成一种开笼 C(60)衍生物来实现对这种分子的批量分离，该衍生物的开口可以在 120°C 下原位扩大，从而在高压条件下定量包裹一个水分子。开发了一种相对简单的方法来封闭笼并封装水。通过单晶 X 射线分析确定了 H(2)O@C(60)的结构及其物理和光谱性质。
