Assemblies organized separation uses

Extensive systematic work over the past decade has established that bile acid derivatives have the ability to form crystalline inclusion compounds with various organic substances [1], The accumulated data tell us two notable things. One is that their inclusion behavior varies from one case to another. The other is that their crystals consist of host-inherent or guest-dependent assemblies with different molecular arrangements and hydrogen-bonding networks. These facts force us to direct our attention to separation engineering accompanied by crystallization and... 

The molecular assemblies described above have inspired us, in recent years, to develop finite assemblies in the solid state that exhibit chemical reactivity. Specifically, we,69 and others,70 have been utilizing principles of molecular recognition and self-assembly to develop a method to direct the formation of covalent bonds in organic solids. The method builds on the work of Schmidt on the reactivity of cinnamic acids in the organic solid state.45 Specifically, Schmidt has described topochemical postulates that dictate geometry criteria for a [2 + 2] photodimerization to occur in a solid. The postulates state that two carbon-carbon double (C=C) bonds should be aligned in parallel and separated by a distance <4.2 A to react. 

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