Guests molecular

Anon., Host-Guest Molecular Interactions, from Chemistry to Biology, CIBA Foundation Symposia Series, No. 158, John Wiley Sons, Hoboken, NJ, 1991. 

With reference to hosts and a guest, molecular assemblies have to conform to certain circumstances, generally called complementary relationships. They involve both steric and electronic terms. The objects may be achieved by the use of properly chosen sensor groups and by a suitably tailored basic skeleton as exemplified by the present scissor- or roof-shaped host molecules. From the point of view of the introductory thoughts of this chapter (cf. Sect. 3.1), it is a matter of consideration to see how consistent the scissor or the roof simile is in the light of crystal structures. 

A large number of other host compounds have been designed to incorporate functional sites which are suitably placed for interaction with the binding sites of a guest. Molecular models suggested (Newcomb, Timko, Walba Cram, 1977) that the somewhat more rigid ring in the... 

The electronic processes in the host-guest molecular system are best illustrated by a classical Jablonski diagram [20], which was first proposed in 1933 to describe absorption and emission of light (Figure 4.1). 

Host-Guest Molecular Interactions from Chemistry to Biology Chadwick, D. J., Widdows, K., Eds. Ciba Foundation Symposium 158 John Wiley Sons Chichester. UK, 1991. 

Maximum drug concentration, assuming a guest molecular weight of 500 Da and all cavities are filled (mg/g)... 

Involvement of Water in Host-Guest Interactions, R. U. Lemieux, L. T. J. Delbaere, H. Beierbeck and U. Spohr, Ciba Found. Symp. No. 158, Host-Guest Molecular Interactions From Chemistry to... 

Figure 15.6 Schematic diagram of the azobenzene nanotube assembly on the complementary a-CD/Au substrates via host-guest molecular recognition and light-induced nanotube detachment and attachment on the a-CD surfaces.20 (Reprinted with permission from I. A. Baneijee et al., J. Am. Chem. Soc. 2003,125, 9542-9543. Copyright 2003 American Chemical Society.)...

J. D. Dunitz, in Host-Guest Molecular Interactions From Chemistry to Biology, D. J. Chadwick and K. Widdows, eds., John Wiley Sons, Chichester, 1991, p. 92. 

Martyn F. Guest, Molecular Science Software Group, Environmental and Molecular Sciences Laboratory, Pacific Northwest Laboratory, Richland, Washington 99352, U.S.A. (Electronic mail mf guest pnl.gov)... 

It is assumed in the vdWP theory[12] that (1) the cage structure is not distorted by the incorporation of guest molecules, (2) the partition function is independent of the occupation of other cages, (3) the guest molecule inside a cage moves in the force field created by water molecules fixed at lattice sites and there is no coupling between host and guest molecular motions, and (4) that classical mechanics is adequate to describe these systems. 

Snyder, M.A. Vlachos, D.G. Rational, hierarchical parameterization of complex zeolite-guest molecular models. Mol.Sim. 2004, 30, 561-577. 

In all cases the catalyst favored the phenyl derivative chemoselectivity was in the 80-90% range. The (3-CD unit selectively incorporates the phenyl ring and this assists the transport of the substrate from the organic into the aqueous phase. Formation of such a host/guest molecular complex keeps the alkene double bond at a suitable distance to interact with the Rh-phosphine catalyst. Both effects increase the rate of hydrogenation of 4-phenyl 1-butene. 

Lemieux, R.H., Delbaere, L.T.J., Beverbeek, H., Spohr, U. (1991) In Host-Guest Molecular Interaction from Chemistry to Biology, Clba Foundation Symposium, pp. 231-248, Wiley. Chichester. 

A host-guest molecular recognition process of L-tryptophan, with the above various triangular, bowl-shaped Cp Rh-nucleobase/nucleoside/nucleotide cyclic trimer molecular receptors, was also detected in a gas phase by electrospray ionization mass spectrometry.In this case, the supramolecular complex formation was found to occur predominately via non-covalent tt-tt interactions non-covalent hydrophobic forces apparently being weak or nonexistent. Trp-Met-Asp-Phe tetrapeptide with the trimeric-rhodium host [Cp Rh(2 -deoxyadenosine)]3[OTf]3 also formed a host-guest complex in water that is detected in the gas phase. 

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