title: Delocalized π state between molecules through a surface confined pseudodihydrogen bond.
abstract: When 3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA) and coronene molecules coadsorb on the Ag(111) surface, one-dimensional PTCDA molecular oligomers with efficient electronic connection via noncovalent bonds are observed by low temperature scanning tunneling microscopy. Density functional theory calculations indicate the neighboring PTCDA molecules form oligomers due to strong PTCDA-metal interactions, which result in overlapping of π orbitals and pseudodihydrogen surface bonds between molecules. Our results provide a potential approach for electron transport from molecule to molecule directly through noncovalent bond.
authors.affiliation: Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China. lchen@iphy.ac.cn
authors.forename: Lan
authors.initials: L
authors.lastname: Chen
authors.forename: Hui
authors.initials: H
authors.lastname: Li
authors.forename: Andrew Thye Shen
authors.initials: AT
authors.lastname: Wee