Supramolecular chemistry definition

Since reference was made to supramolecular chemistry, perhaps it is use fill to remember some definitions. Supramolecular chemistry is the chemistry of molecular assemblies and of the intermolecular bond. It is the chemistry beyond the molecule and deals with organized entities of higher complexity that result from the association oftwo or more chemical species held together by intermolecular forces ... 

According to accepted current definitions, supramolecular chemistry is the chemistry of the intermolecular bond distinct from molecular chemistry, which... 

Intermolecular recognition and self-assembly processes both in the solid, liquid, and gas phases are the result of the balanced action of steric and electronic factors related to shape complementarity, size compatibility, and specific anisotropic interactions. Rather than pursuing specific and definitive rules for recognition and self-assembly processes, we will afford some heuristic principles that can be used as guidelines in XB-based supramolecular chemistry. 

The examples cited in this chapter are but a rather small and arbitrary selection from the richly varied possibilities for supramolecular bonding. Recognition of the intrinsic chemical (partially covalent, exchange-type) character of supramolecular interactions leads inevitably to an extended definition of chemistry that includes many aspects of nanoscale aggregation, structure, and function in the biophysical and material-science domains. From this viewpoint, the molecule is seen to be... 

Pyridinedicarboxylie acid (dipicolinic acid) is definitely an excellent building block in coordination and supramolecular chemistry as outlined above. 

Science is a complicated matter and any definition of a research area is an oversimplification. This is especially true for a new domain in statu nascendi such as supramolecular chemistry [9]. However, a recent development in... 

Definitions have a clear, precise core but often fuzzy borders, where interpenetration between areas takes place. These fuzzy regions in fact play a positive role since it is often there that mutual fertilization between areas may occur. This is certainly also true for the case at hand, the case of supramolecular chemistry and its language [1.20]. 

Supramolecular chemistry has been defined by one of its leading proponents, Jean-Marie Lehn, who won the Nobel Prize for his work in the area in 1987, as the chemistry of molecular assemblies and of the intermolecular bond . More colloquially this may be expressed as chemistry beyond the molecule . Other definitions include phrases such as the chemistry of the non-covalent bond and non-molecular chemistry . Originally supramolecular chemistry was defined in terms of the non-covalent interaction between a host and a guest molecule as highlighted in Figure 1.1, which illustrates the relationship between molecular and supramolecular chemistry in terms of both structures and function. 

These descriptions, while helpful, are by their nature noncomprehensive and there are many exceptions if such definitions are taken too literally. The problem may be linked to the definition of organometallic chemistry as the chemistry of compounds with metal-to-carbon bonds . This immediately rules out Wilkinson s compound, RhCl(PPh3)3, for example, which is one of the most important industrial catalysts for organometallic transformations known in the field. Indeed, it is often the objectives and thought processes of the chemist undertaking the work, as much as the work itself, which determine its field. Work in modern supramolecular chemistry encompasses not just host-guest systems but also molecular devices and machines, molecular recognition, so called self-processes ... 

Give a concise definition of the term supramolecular chemistry . Explain the distinction between molecular and supramolecular interactions. Illustrate your answer with examples of supramolecular interactions and discuss their relative importance. 

In the context of organic synthesis, the term synthon was introduced by Corey in 1967 to refer to structural units within molecules which can be formed and/or assembled by known or conceivable synthetic operations. This general definition was modified by Desiraju for supramolecular chemistry Supramolecular synthons are structural units within supermolcules which can be formed and/or... 

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