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June 12, 2009
4.4. From Molecules to Supramolecules
Outside Mitochondrion
Mitochondrial
Inner
Membrane
ADP + Phosphate
ATP
Rotation
The rotation of ATP synthase.
Figure 4.29.
Figure 4.30. Schematics showing motion of the cationic tail which can 91 ch04
only interact with its macrocyclic head in the cis isomer; the cis-trans iso-
merisation is induced by radiation. [V. Balzani, A. Credi, F. M. Raymo
and J. F. Stoddart, Artificial Molecular Machines, Angew. Chemie. Int.
Ed. 2000, 39(19), 3348–3391 Copyright Wiley-VCH Verlag GmbH & Co
KGGA. Reproduced with Permission.]
radiation. Radiation of precise wavelengths have been conve-
niently used to induce conformational changes, e.g. in the cis-
trans isomerisation of a supramolecule shown in Fig. 4.30. In this
example, the “lock” and “unlock” positions of the ionic tail group