Theobald James A, Oxtoby Neil S, Phillips Michael A, Champness Neil R, Beton Peter H
School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, UK.
Nature. 2003 Aug 28;424(6952):1029-31. doi: 10.1038/nature01915.
Selective non-covalent interactions have been widely exploited in solution-based chemistry to direct the assembly of molecules into nanometre-sized functional structures such as capsules, switches and prototype machines. More recently, the concepts of supramolecular organization have also been applied to two-dimensional assemblies on surfaces stabilized by hydrogen bonding, dipolar coupling or metal co-ordination. Structures realized to date include isolated rows, clusters and extended networks, as well as more complex multi-component arrangements. Another approach to controlling surface structures uses adsorbed molecular monolayers to create preferential binding sites that accommodate individual target molecules. Here we combine these approaches, by using hydrogen bonding to guide the assembly of two types of molecules into a two-dimensional open honeycomb network that then controls and templates new surface phases formed by subsequently deposited fullerene molecules. We find that the open network acts as a two-dimensional array of large pores of sufficient capacity to accommodate several large guest molecules, with the network itself also serving as a template for the formation of a fullerene layer.
选择性非共价相互作用已在基于溶液的化学中得到广泛应用，用于将分子组装成纳米级功能结构，如胶囊、开关和原型机器。最近，超分子组织的概念也被应用于通过氢键、偶极耦合或金属配位稳定的表面上的二维组装。迄今为止实现的结构包括孤立的行、簇和扩展网络，以及更复杂的多组分排列。另一种控制表面结构的方法是使用吸附的分子单层来创建容纳单个目标分子的优先结合位点。在这里，我们结合了这些方法，通过氢键将两种类型的分子组装成二维开放蜂窝网络，然后控制并模板化由随后沉积的富勒烯分子形成的新表面相。我们发现，开放网络充当了一个二维大孔阵列，其容量足以容纳几个大型客体分子，网络本身也作为富勒烯层形成的模板。
