Molecular loop lock: A redox-driven molecular machine based on a host-stabilized charge-transfer complex

Angewandte Chemie - International Edition

Volumn 44, Issue 1, 2004, Pages 87-91

  Woo, Sung Jeon ^a   Kim, Eunju ^a   Young, Ho Ko ^a   Hwang, Ilha ^a   Jae, Wook Lee ^a,b   Kim, Soo Young ^a   Kim, Hee Joon ^a,c   Kim, Kimoon ^a  

^a Pohang University of Science and Technology (POSTECH)   (South Korea)

^b Dong A University   (South Korea)

^c Kumoh National Institute of Technology   (South Korea)

Author keywords

Charge transfer; Electrochemistry; Molecular devices; Self assembly; Supramolecular chemistry

Indexed keywords

NAPHTHALENE; PARAQUAT; SODIUM DITHIONITE;

ARTICLE; COMPLEX FORMATION; HYDROPHOBICITY; MACHINE; MOLECULAR INTERACTION; MOLECULAR LOOP LOCK; MOLECULAR MODEL; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; OXIDATION REDUCTION REACTION; PROTON NUCLEAR MAGNETIC RESONANCE; SYNTHESIS; ULTRAVIOLET SPECTROSCOPY;

EID: 11244351588     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/anie.200461806     Document Type: Article

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23. 2⊂CB[8]) and free CB[8] upon chemical or electrochemical reduction and that the reaction is reversible: W. S. Jeon, H.-J. Kim, C. Lee, K. Kim, Chem. Commun. 2002, 1828.
24. 2+ generated in the first reduction step, but we do not clearly understand this process at the moment.
25. The bulky cationic unit was introduced at the terminal to prevent the formation of intermolecular CT complexes and intermolecular viologen radical-cation dimers inside CB[8] upon reduction. Another role of the cationic terminal unit is to improve the solubility of the complex after reduction.
26. 3+ (see Supporting Information).
27. 2+) and the activation process (reduction).
28. 3+ and related compounds will be published elsewhere in due course.
29. A "safeguarded" switch has been reported: J. W. Lee, K. Kim, K. Kim, Chem. Commun. 2001, 1042.
30. It may also be viewed as a reversibly operating molecular AND logic gate: F. M. Raymo, S. Giordani in Encyclopedia of Nanoscience and Nanotechnology, Vol. 5 (Ed.: H. S. Nalwa), American Scientific, California, 2004, pp. 677-692.