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Mechanically Interlocked Porphyrin Gears Propagating Two Different Rotational Frequencies
Author(s) -
Ogi Soichiro,
Ikeda Tomohiro,
Wakabayashi Rie,
Shinkai Seiji,
Takeuchi Masayuki
Publication year - 2011
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.201001656
Subject(s) - chemistry , porphyrin , rotor (electric) , supramolecular chemistry , pyridine , dichloromethane , molecular physics , crystallography , photochemistry , physics , organic chemistry , crystal structure , quantum mechanics , solvent
We report a new supramolecular rotor ( 1 ), in which a lanthanum(III) bis(porphyrinate)s double‐decker (LaDD) bears two porphyrinatorhodium(III)‐based rotors whose planes aresituated orthogonally to one another. In [D 2 ]dichloromethane, 1 H NMR spectral results indicated that rotational information was transmitted from the LaDD rotor to two porphyrinatorhodium(III)‐based rotors through mechanical interaction of the teeth of the rotors. Mechanical interaction was achieved among the multiple rotors in 1 even after switching the rotational activity of the LaDD rotor by using [D 5 ]pyridine. The spatial arrangement of the two porphyrinatorhodium(III)‐based rotors is a critical factor in maintaining mechanical interaction between multiple molecular rotors when changing the dynamic properties of one rotor.