Molecular Rotation in Self-Assembled Multidecker Porphyrin Complexes
Source abstract
Abstract
An alkyl chain-substituted multidecker porphyrin (a cerium double-decker porphyrin (CeDDP) and a lanthanum triple-decker porphyrin (LaTDP)) complexes were arranged in a monolayer array on Au(111) substrate. By using a pulse injection deposition method, both multidecker complexes were deposited on the surface intact to form a well-defined two-dimensional array. Low-temperature scanning tunneling microscopy (STM) allowed the measurement of the topographic heights of the multidecker porphyrin complexes and visualization of their internal structures clearly. The STM images suggest that the top porphyrin ligand in CeDDP rarely rotates under nondestructive imaging condition, while the top porphyrin ligand in LaTDP exhibits flip-flop rotation even under the nondestructive imaging condition at sub-pA tunneling currents. These results provide the future applications of molecular-scale mechanical machines and single molecule storage memory.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Molecular Junctions and Nanostructures · Force Microscopy Techniques and Applications · Surface Chemistry and Catalysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395 Japan
Organic Nanomaterials Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba 305-0047 Japan
Department of Chemistry, Faculty of Science, Hokkaido University, North 10, West 8, Sapporo, Hokkaido, 060-0810 Japan
Department of Nanoscience, Faculty of Engineering, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan
Institute of Systems, Information Technologies and Nanotechnology, 203-1 Moto-oka, Nishi-ku Fukuoka 819-0385 Japan
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