Direct Visualization of Electronic Asymmetry within a Phenyl-Linked Porphyrin Dimer.
Asymmetric electronic structures within a single molecule have been investigated by scanning tunneling microscopy and spectroscopy. Inside of a phenyl-linked porphyrin dimer, the asymmetric electronic structures are achieved by the incorporation of a cobalt ion in one porphyrin moiety. We find that a p-n junction between two π-conjugated segments is formed within the porphyrin dimer. The understanding of the local electronic structures of the intramolecular p-n junction should represent a fundamental step to realizing single molecular devices.
Department of Nanoscience and Technology, Yokohama City University, 22-2 Seto, Yokohama 236-0027, Japan.
Takashi
T
Yokoyama
Department of Nanoscience and Technology, Yokohama City University, 22-2 Seto, Yokohama 236-0027, Japan.
Fumitaka
F
Nishiyama
Kondo effect; porphyrin; scanning tunneling microscopy; single-molecule electronics