Calixarenes and Their Derivatives

Odd-numbered calix[n]arenes ( = 5, 7, 9) and large calix[ ]arene homologs were also formed by tuning reaction conditions, but owing to the low 

Calix[n]arene derivatives have also been synthesized. Thiacalrx[ ]ar-enes and homooxacalix[n]arenes, in which methylene bridges of the calix[n]arenes are replaced with sulfides and CH2-O-CH2 bonds. 

Calix[8]arene (1.3)-C60 Complex Water-soluble Calix[4]arene (1.4) 

Reproduced with permission from ref. 46. Copyright 2006 American 

Sindelar et al7 A key monomer is 2,4-dimethylglycoluril, in which substitutes protect the two nitrogen atoms. Condensation of 2,4-dimethylglycoluril and formaldehyde in HCl catalyst afforded bambus[6]uril, in which glycoluril units are connected by single methylene bridges (yield 30%). Tuning 

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Calixarenes and their derivatives (Scheme 9.3) are among the most widely used scaffolds in anion-binding chemistry. Strategies for their functionalization have been reviewed recently [36,37]. The popularity of calixarenes reflects to a large extent the ease with which the cores themselves can be modified as well as the fact that they... 

Calixarenes and their derivatives have been of growing interest to the scientific community due to their widespread applications as unique and versatile hosts [34-42]. This class of compounds possesses a cavity with distinct hydrophobic and hydrophihc sites represented by upper and lower rims. By suitable modifications of these sites, one may obtain several different calixarenes for a wide variety of applications. It has been demonstrated that a variety of guests with different size, shape, properties, and characteristics can interact with calixarenes and their derivatives [35,36]. 

In the light of the foregoing discussion, it is expected that SAIL can alter the properties of calixarenes and their derivatives as it possesses favorable properties of both RTILs and surfactants. Thus, understanding the effect of SAIL on the properties of calixarenes with different molecular architecture can open up new avenues in the field of host-guest chemistry. We report herein the outcomes of the investigation of the effect of a SAIL, I-decyl-3-methylimidazolium chloride ([Cj mim][Cl]), on four structurally different calixarenes, (1), (2), (3), and (4), within basic aqueous media... 

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