Endobasic cyclophanes

Cyclophane hosts may be classified by the nature of the cavity that they possess. There are those that have an acidic cavity, called endoacidic cyclophanes - such cyclophanes are able to bind cationic species. In contrast, endobasic cyclophanes... 

Cyclophanes Endoacidic, Endobasic, and Endolipophilic Cavities, p. 424 Hydrogen Bonding, p. 658 Ion Channels and Their Models, p. 742 n-n Interactions Theory and Scope, p. 1076 van der Waals Forces, p. 1550... 

The internal cavity of a cyclophane is endobasic if functional groups are present that are basic or electron donating the most obvious groups include the ethers, pyridines, amines, and phosphorus-based donors. Cyclophanes in this category would be expected to bind metal ions and also promote H-bonding interactions within the cavity. Hence, in this section, crown ethers and azamacrocycles could easily be included. Under this heading, we can also... 

Twistophanes 10 and 11 represent a new class of cyclophanes that recently emerged as the follow-up compounds to the endobasic host 9 first prepared by Baxter. The cyclic structures comprise substituted 2,2 -bipyridyl groups linked via acetylinic linkers, and they are primarily developed as sensors for metal ions. For both... 

Cyclophanes Endoacidic, Endobasic, and Erzdolipophilic Cavities, p. 424 DNA Nanotechnology, p. 475... 

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