Institut für Physikalische Chemie, Johannes Gutenberg Universität Mainz, Duesbergweg 10-14, 55128 Mainz (Germany); Graduate School of Excellence "Materials Science in Mainz", Staudinger Weg 9, 55128 Mainz (Germany).
Angew Chem Int Ed Engl. 2014 Jul 21;53(30):7952-5. doi: 10.1002/anie.201309128. Epub 2014 Apr 1.
A substrate-guided photochemical reaction of C60 fullerenes on calcite, a bulk insulator, investigated by non-contact atomic force microscopy is presented. The success of the covalent linkage is evident from a shortening of the intermolecular distances, which is clearly expressed by the disappearance of the moiré pattern. Furthermore, UV/Vis spectroscopy and mass spectrometry measurements carried out on thick films demonstrate the ability of our setup for initiating the photoinduced reaction. The irradiation of C60 results in well-oriented covalently linked domains. The orientation of these domains is dictated by the lattice dimensions of the underlying calcite substrate. Using the lattice mismatch to deliberately steer the direction of the chemical reaction is expected to constitute a general design principle for on-surface synthesis. This work thus provides a strategy for controlled fabrication of oriented, covalent networks on bulk insulators.
本文介绍了利用非接触原子力显微镜研究 C60 富勒烯在方解石（一种块状绝缘体）上的底物导向光化学反应。通过分子间距离的缩短，明显表现为莫尔图案的消失，可以明显看出共价键合的成功。此外，在厚膜上进行的 UV/Vis 光谱和质谱测量表明，我们的装置有能力引发光诱导反应。C60 的辐照导致了取向良好的共价键合域。这些域的取向由下面方解石衬底的晶格尺寸决定。利用晶格失配来故意引导化学反应的方向，有望成为表面合成的一般设计原则。因此，这项工作为在块状绝缘体上可控制备取向的共价网络提供了一种策略。
