Simple molecular-level machines. Interchange between different threads in pseudorotaxanes

Alberto Credi*, Marco Montalti, Vincenzo Balzani, Steven J. Langford, Françisco M. Raymo, J. Fraser Stoddart

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

80 Scopus citations


In suitably designed supramolecular systems, composed of a macrocycle and two different thread-like compounds, it is possible to choose, by means of chemical inputs, which thread enters the macrocycle's cavity, and it is also possible to cause reversible interchange between the two threads. Two such systems are described. In one of them, the macrocyclic component is 1,5-dinaphtho-38-crown-10, the potential threads are 1,1′-dibenzyl-4,4′-bipyridinium and 2,7-dibenzyldiazapyrenium dications, and the chemical input used is amine/acid. In the other system, the macrocyclic component is the tetracationic cyclophane, cyclobis(paraquat-p-phenylene), the potential threads are tetrathiafulvalene and a 1,5-dioxynaphthalene derivative, and the input is reduction/oxidation. These systems are examples of chemically driven molecular-level mechanical machines.

Original languageEnglish (US)
Pages (from-to)1061-1065
Number of pages5
JournalNew Journal of Chemistry
Issue number10
StatePublished - Oct 1998

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Materials Chemistry


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