Molecular Machines, 1st Edition by Vincenzo Balzani, Alberto Credi, Belen Ferrer, Serena Silvi

By Vincenzo Balzani, Alberto Credi, Belen Ferrer, Serena Silvi (auth.), T. Ross Kelly (eds.)

"In my opinion, this publication presents deep perception into this attention-grabbing, tough, and more and more very important field.
Are you curious about molecular machines and searching out a accomplished e-book to benefit the $64000 actual paradigms and artificial ideas? Do you train molecular machines in a chemistry or engineering direction at a school and wish to contain the standard and a few strange experimental concepts on your path? Are you a professional in molecular machines and wish to stay alongside of contemporary advancements? do you want to grasp why the paintings on molecular machines is difficult the vintage definition of chemical engineering? the reply to all 4 questions is identical: here's the booklet for you! "(Stefan H. Bossmann, Kansas nation college, J.AM.Chem.soc. vol.128, No.32, 2006, JA0697301)

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As for the corresponding catenanes, it was clearly demon- Fig. P. Collin et al. Fig. 12 Principle of synthesis of rotaxane 6+4 (see Fig. 13). i Formation of a monostoppered axle, and ii threading of the axle through the wheel. iii Dethreading of the macrocycle is prevented by adding a second blocking group Fig. 13 Representation of the two stable forms of the rotaxane 6n+ strated that the compound undergoes a complete rearrangement upon reduction or oxidation of the copper center, going from a 4-coordinate system for copper(I) to a pentacoordination mode for divalent copper.

Interestingly, the transformation of Fig. 5 is accompanied by a change in the electrochemical properties of the complex, paralleling the spectroscopic changes. 63 V vs. 07 V. Finally, reduction of 32+ 5 can quantitatively be carried out by electrolysis to regenerate the starting copper(I) complex, 3+4 . Rearrangement of the monovalent complex (3+5 →3+4 ) takes place on the second time scale, as estimated from cyclic voltammogram (CV) measurements. This first system corresponds more to the demonstration of a principle than to a practically promising molecular machine.

When one of the two rings carries two different recognition sites, then the opportunity exists to control the dynamic processes in a manner reminiscent of the controllable molecular shuttles. By switching off and on again the recognition properties of one of the two recognition sites of the non-symmetric ring by means of external energy stimuli, it is indeed possible to induce conformational changes that can be viewed as the rotation of the non-symmetric ring. An example of such a behavior is offered by the catenane 74+ shown in Fig.

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