Various symmetric isomers of [2,2′-bipyridine]dicarbonitrile and [1,10-phenanthroline]dicarbonitrile were crystallized from solution and also deposited as monolayers adsorbed on graphite. The resulting three- and two-dimensional (3D and 2D) structures were studied by single-crystal X-ray diffraction and scanning tunneling microscopy, respectively. Previous comparisons of 3D and 2D structures have provided new understanding of molecular organization and have revealed that crystals and adlayers can have closely analogous structures despite the effects of the underlying surface, especially when organization is dominated by strong intermolecular interactions within a single plane. The present study extends previous work by showing that analogous 3D and 2D structures can be formed even when association is directed by weaker intermolecular forces, as exemplified by C–H···N interactions of nitriles.

中文翻译：

---

在三个方面和两个方面比较结晶：[2,2'-联吡啶]二腈和[1,10-菲咯啉]二腈的异构体行为

[2,2'-联吡啶]二腈和[1,10-菲咯啉]二腈的各种对称异构体从溶液中结晶出来，并沉积为吸附在石墨上的单分子层。分别通过单晶X射线衍射和扫描隧道显微镜对所得的三维（3D和2D）结构进行了研究。之前对3D和2D结构的比较提供了对分子组织的新认识，并且揭示了尽管存在下层表面的影响，但晶体和添加层仍可以具有非常相似的结构，尤其是当组织以单个平面内的强烈分子间相互作用为主导时。本研究通过显示即使在较弱的分子间作用力指导缔合的情况下也可以形成类似的3D和2D结构，从而扩展了先前的工作，