Cucurbit uril inclusion complex

Figure 6.15 X-ray structure of the inclusion complex cucurbit [10] uril- cucurbit[5]uril.

Keywords Cobaltocenium, Cucurbit[ ]urils, Cyclodextrins, Dendrimers, Ferrocene, Host-guest complexation, Inclusion complexes, Viologens... 

Ong W, Kaifer AE (2004) Salt effects on the apparent stability of the cucurbit[7]uril-methyl viologen inclusion complex. J Org Chem 69 1383-1385... 

Ong W, Kaifer AE (2003) Unusual electrochemical properties of the inclusion complexes of ferrocenium and cobaltocenium with cucurbit[7]uril. Organometallics 22 4181—4183... 

For a time one managed by choosing new descriptions and used intricate contractions and modifications of the available terms Some examples being clathrate complex, clathrate hydrate, hydrocarbon clathrate, gas hydrate, interlamellar sorbent, molecular compoimd, addition compound, loose addition complex, cascade complex, lock-and-key complex, super molecular complex, molecular complex associate, tweezer molecule complex, soccer molecule complex, hexapus molecule complex, octopus molecule complex as well as complexes or inclusion compounds of spherands, sepulchrands, coronands, cyclidenes, cryptands, cryptophanes, calixarenes, cucurbit-uril, annelides etc. 

Besides the inclusion complexes, calix[6]arenes may fomi co-crystals with other molecules. An interesting example is a co-crystal formed by para-sulphonatocalrx [6]arene hexaammonium with cucurbit[6]uril. As the Authors mention in the paper this structure not only exhibit an intriguing topology but also show clearly the role of hydrophobic—hydrophobic and hydrophilic hydrophilic interactions in directing the supramolecular assembly [51]. It is interesting to notice a significant amount of free space in the crystal lattice (Fig. 38.24). 

In the second way, non-radiative rate constants k p, S kq [Q ) and k f, S kq Q] are decreased). At room temperature, many organized media at molecule scale can stabilize the populated triplet states and further enhance observed phosphorescence signals. Such media include deoxycholate dimmer aggregate [14-16], surfactant micelles [17] and cucurbit[n]urils [18]. CD as one kind of the media is used frequently to minimize most efficiently the nonradiative and quenching processes to realize high i or based on formation of inclusion complexes. 

Megyesi, M. Biczok, L. Jablonkai, I. (2008). Highly sensitive fluorescence response to inclusion complex formation of berberine alkaloid with cucurbit[7]uril. /. Phys. Chem. C, 112, 3410-3416. 

Noujeim, N. Jouvelet, B. Schmitzer, A. R. (2009). Formation of inclusion complexes between l,l -dialkyl-3,3 -(l,4-phenylene)bisimidazohum dibromide salts and cucurbit[7]uril. J. Phys. Chem. B, 113,16159-16168. 

Mitkina TV, Sokolov MN, Naumoc DM, Kuratieva NV, Gerasko OA, Fedin VP. Jorgensen complex within a molecular container selective encapsulation of rrans -[CO(en)2Cl2] into cucurbit[8]uril and influence of inclusion on guest s properties. Inorg Chem 2006 45 6950-5. 

Kim H-J, Heo J, Jeon WS, Lee E, Kim J, Sakamoto S, Yamaguchi K, Kim K. Selective inclusion of a hetero-guest pair in a molecular host formation of stable charge-transfer complexes of cucurbit[8]uril. Angew Chem Int Ed 2001 40 1526-9. 

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