TAILIEUCHUNG - Ebook Supramolecular chemistry (2nd edition): Part 2

(BQ) Part 2 book "Supramolecular chemistry" has contents: Network Solids, self assembly, molecular devices, biological mimics and supramolecular catalysis, interfaces and liquid assemblies, supramolecular polymers, gels and fibres, nanochemistry. | 9 Network Solids ‘Laws are generally found to be nets of such a texture as the little creep through, the great break through, and the middle-sized are alone entangled in.’ William Shenstone (1714–1763), Essays on Men and Manners. On Politics. Network Solids 538 What Are Network Solids? Concepts and Classification Moulton, B. and Zaworotko, M. J., ‘From molecules to crystal engineering: Supramolecular isomerism and polymorphism in network solids’, Chem. Rev. 2001, 101, 1629–1658. So far we have been predominantly focused on the host-guest paradigm of supramolecular chemistry. In Chapters 3–6 we looked at discrete, solution phase hosts for various guests. In Chapter 7 we focused on (predominantly organic) molecular crystalline solids with guest binding cavities or channels and in the last chapter we developed this solid state chemistry into crystal engineering – designer solids based on supramolecular interactions. Now that we have seen that it is possible to understand and engineer molecular solids we turn to infinite solid-state networks where, formally, there are no discrete molecules and the entire solid is either all one molecule (as in diamond) or made up of relatively few infinite polymeric strands linked together by strong covalent, or more commonly, dative coordination bonds. Into this category fall naturally occurring inorganic materials such as zeolites as well as a vast range of coordination polymers – infinite coordination complexes in which metal ions are bridged by multidentate ligands into an infinite line or array. Some of these materials (. zeolites) have cavities and are porous and so act as hosts for guests in the way we saw organic hosts do in Chapter 7. Others are not hosts but are still interesting from the point of view of materials design using supramolecular interactions or templating. In this chapter we progress from frameworks for capture, storage or transport that are often only stable in the presence of guests (. .

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