Endoreceptors

Dendrimer interior functional groups and cavities can retain guest molecules selectively, depending on the nature of the guest and the dendritic endoreceptors, the cavity size, the structure, and the chemical composition of the peripheric groups. Two main methods are known for the synthesis of metal nanoparticles inside dendrimers. The first method consists of the direct reduction of dendrimer-encapsulated metal ions (Scheme 9.4) the second method corresponds to the displacement of less-noble metal clusters with more noble elements [54]. 

From Endoreceptors to Exoreceptors. Molecular Recognition at Surfaces... 

Coronates, Spherical Containers, Bowl-Shaped Surfaces Bis- and Tris-Bidentate Chelators as Endoreceptors Cation-Mediated Formation of Metallocoronates... 

Endoreceptors and Exoreceptors Host molecules with surface receptor sites are called exoreceptors, while hosts with receptor sites inside cavities are called endoreceptors. Exoreceptors yield a wide array of possibilities when constructing host systems. 

The binding of a redox system such as ferrocene to endoreceptors has been used to recognize particular guests. The first example concerned with the recognition of alkali-metal cations by a crown ether incorporating a ferrocenophane moiety [366] as shown on Figure 3. 

Molecnlar recognition of an analyte by a branched macromolecule can occur either at the surface of the polymer (so-called exoreceptors) or within the interior of the macromolecule (i.e., endoreceptors) (exemplified for a generic... 

Fig. 7. Schematic diagram of endoreceptors fitted with acidic or basic donor sites.

Saalfrank RW, Burak R, Breit A, Stalke D, Herbst-Irmer R, Daub J, Porsch M, Bill E, Miither M, Trautwein AX (1994) Mixed-valence, tetranuclear iron chelate complexes as endoreceptors charge compensation through inclusion of cations. Angew Chem Int Ed 33 1621-1623... 

Here we examine the effects induced by a change in solvent polarity and addition of tetrabutylammonium hexafluorophosphate, hereafter indicated as NBU4PF6, on the thermodynamic and kinetic features of the host-guest complex formation between the substrates and the endoreceptor tweezer T. Char-... 

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