Self-Assembly in Supramolecular Systems (Monographs in by Ian M Atkinson, Len F Lindoy, J Fraser Stoddart

By Ian M Atkinson, Len F Lindoy, J Fraser Stoddart

Molecular self-assembly is a common phenomenon in either chemistry and biochemistry. but it used to be now not until eventually the increase of supramolecular chemistry that focus has more and more been given to the designed self-assembly of quite a few man made molecules and ions. To a wide quantity, good fortune during this sector has mirrored wisdom received from nature. despite the fact that, an elevated expertise of the latent steric and digital info implanted in person molecular parts has additionally contributed to this good fortune. when no longer but drawing close the sophistication of organic assemblies, man made structures of accelerating subtlety and huge aesthetic charm were created. Self-Assembly in Supramolecular platforms surveys highlights of the development made within the construction of discrete artificial assemblies and gives a beginning for brand spanking new staff within the quarter, in addition to history studying for skilled supramolecular chemists.

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Am. Chem. , 1994, 116, 4326. W. W. Whitlock, J. Am. Chem. , 1978, 100,4921; M. L. R. Kana and S. Elahmad, J. Am. Chem. , 1994, 116, 8392; C. P. M. W. Kubik and J. Rebek, J. Am. Chem. , 1995, 117, 12733; M. -G. Klarner, J. Prukt. , 1999, 341, 245. -G. Kllrner, J. Benkhoff, R. Boese, U. Burkert, M. Kamieth and U. Naatz, Angew. , f n f . Ed. , 1996, 35, 1130. Hydrogen-bonded and n-Stacked Systems 31 tain degree of flexibility in this system, allowing the tweezer arms to expand or contract such that interaction with a suitable guest can be optimised.

M. Ajayan, 0. Stephan, Ph. Redlich and C. Colliex, Nature, 1995, 375, 564; M. P. R. Martin, Science, 1995, 268, 700; V. Percec, D. Schlueter, G. D. Cheng and A. Zhang, Mucrumolecules, 1998, 31, 1745. P. M. , 1993, 34, 1677. 5 Reversible self-assembly of a short molecular cylinder through dimeriscition of the cyclic chloric derivative 2736 of the type shown in the figure. Assembly (dimerisation) occurs through hydrogen bond formation involving the complementary cis-amide functions on the rim of each macrocycle.

This ~ , ~resulted ' in a rate increase for product formation. 7 Further Supramolecular Categories In the following two chapters, we will explore two further major categories of discrete, non-metal-containing, supramolecular assemblies - namely, rotaxanes and the catenanes. A. M. Conn and J. Rebek, J. Am. Chem. M. A. Wintner and J. Rebek, Angew. , Int. Ed. J. Pieters, I. Huc and J. Rebek, Angew. , Int. Ed. , 1994, 33, 1579. CHAPTER 4 Rotaxanes Introduction Rotaxanes are molecular assemblies in which a linear component is mechanically threaded through one or more cyclic molecules - much like beads on a string with the ends of the linear component terminated with bulky groups to prevent unthreading of the structure.

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