Single Molecule Visualization of Coordination-Assembled Porphyrin Macrocycles Reinforced with Covalent Linkings

摘要

Supramolecular chemistry has emerged as a powerful strategy for construction of molecular-based devices with advanced functions and well-defined nanometer-scale structures.Structural determination of supramolecular aggregates is of great importance and mainly performed by means of NMR and/or X-ray crystal analysis.One of the convincing ways to evaluate or even visualize the structure,other than those just mentioned,is scanning probe microscopy.For example,antenna complexes in photosynthetic bacteria and their aggregates have been demonstrated.Scanning tunneling microscopy (STM) has received considerable attention since it provides clear images of organic molecules adsorbed on a conductive substrate with atomic resolution.