Host/guest recognition

J. A Swift, A M. Reynolds, M. D. Ward, "Cooperative host-guest recognition in crystalline clathrates steric guest ordering by molecular gears , Chem Mater. 1998, 10, 4159-4168. 

It is noteworthy that the encapsulation of the N -CHs group allowed the dissolution of the guest in organic solvent. This remarkable property can find some application in the field of host-guest recognition processes, where extraction and transport from or through different liquid phases are of interest. Further developments can now be considered in the field of material chemistry. It is conceivable to design a cavitand dimer by lower-rim to low-... 

Fortunately, more efficient methods for the complexation of macrocyclic hosts with acyclic guest molecules have become available with the advent of supramo-lecular chemistry, resulting in higher yields in rotaxane and catenane synthesis. In the following sections, the preparation of different types of interlocked molecules, with the use of host-guest recognition, is discussed. It should be noted that these template-directed methods differ significantly from the above-mentioned stochastic approach [28]. 

MRT operates from a different base from traditional techniques. In general, traditional techniques are not based on specific host-guest recognition as is MRT. The specificity of MRT allows separations to be accomplished in the presence of high concentrations of matrix species, acid, and base. Also, particular species can be separated in the presence of other species having similar chemistry. The capability of MRT is now illustrated with recent studies of a Superfund Site (Berkeley Pit) [26] and wastewaters from a Navy operation. 

The presence of chirality in host and guest will likewise affect the interaction between them. Chirality can perhaps be seen as a second order source of stored structural information that is available for exploitation, often with dramatic effect, for achieving an additional type of host-guest recognition based on handedness . 

Intelligent molecular systems can be created based on host-guest recognition, which can self-organize and behave differently than nonorganized matter. Supramolecular structures formed by molecular recognition can be used to create molecular systems with specific functions, such as motors or stimulus-responsive... 

Chapter 9 (Biological Applications—Supramolecular Chemistry). Independent of their easily observed photochromic behavior, characterized by their absorption spectra, photochromic compounds are interesting models for supramolecular chemistry involving selective host-guest recognition. This is especially true for biological applications. 

General Mechanism for a Static, Step-wise View on Host-Guest Recognition 455... 

Fig. 3 Reaction of square planar inetal centers with flexible dipyridyl ligands leads to an equilibrating product mixture containing a square and triangle inacrocycle. Host-guest recognition processes bias this mixture toward specific products. (Adapted from Refs. [22,23].)...

Wang, Y. Alvarez, J. Kaifer, A.E. Redox control of host-guest recognition A case of host selection determined by the oxidation state of the guest. Chem. Commun. 1998. 1457. 

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