Judd Chris J, Nizovtsev Anton S, Plougmann Rikke, Kondratuk Dmitry V, Anderson Harry L, Besley Elena, Saywell Alex
School of Physics & Astronomy, The University of Nottingham, Nottingham NG7 2RD, United Kingdom.
School of Chemistry, The University of Nottingham, Nottingham NG7 2RD, United Kingdom.
Phys Rev Lett. 2020 Nov 13;125(20):206803. doi: 10.1103/PhysRevLett.125.206803.
The electronic structure of a molecular quantum ring (stacks of 40-unit cyclic porphyrin polymers) is characterized via scanning tunneling microscopy and scanning tunneling spectroscopy. Our measurements access the energetic and spatial distribution of the electronic states and, utilizing a combination of density functional theory and tight-binding calculations, we interpret the experimentally obtained electronic structure in terms of coherent quantum states confined around the circumference of the π-conjugated macrocycle. These findings demonstrate that large (53 nm circumference) cyclic porphyrin polymers have the potential to act as molecular quantum rings.
通过扫描隧道显微镜和扫描隧道光谱对分子量子环（40单元环状卟啉聚合物堆叠体）的电子结构进行了表征。我们的测量获取了电子态的能量和空间分布，并结合密度泛函理论和紧束缚计算，根据限制在π共轭大环圆周周围的相干量子态来解释实验获得的电子结构。这些发现表明，大尺寸（周长53纳米）的环状卟啉聚合物有潜力充当分子量子环。
