calixarenes and 2-3-bis(benzoyloxy)tartaric-acid

Chiral para-tert-butylcalix[4]arene bearing (S)-alpha-methylbenzylamine groups at lower rim only self-assembles with one of two enantiomers of 2,3-dibenzoyltartaric acid into coiled nanofibers and the coiled nanofibers only stack with the nanofibers having the same handedness to construct bigger ribbon-like fibers bearing porosity.

Topics: Calixarenes; Nanostructures; Nanotechnology; Phenethylamines; Stereoisomerism; Tartrates

Chiral calix[4]arenes bearing long tertiary alkyl groups at the upper rim and S-1-phenylethylamine groups at the lower rim can form heat-set gels and egg-like vesicles enantioselectively with d-2,3-dibenzoyltartaric acid in cyclohexane, which is the first example of heat-set gels resulting from difference in interactions between two component gelators: in addition, the diameter of vesicles decreased with the increase in length of alkyl groups, which could be used to control the size of the vesicles.

Topics: Calixarenes; Cyclohexanes; Gels; Hot Temperature; Molecular Conformation; Particle Size; Phenols; Stereoisomerism; Tartrates

Calixarenes bearing optically pure alpha,beta-amino alcohol groups at their lower rim exhibit exceptional and efficient chiral recognition ability in discrimination of racemic mandelic acid, 2,3-dibenzoyltartaric acid and 2-hydroxy-3-methylbutyric acid. [structure: see text]

Topics: Amino Alcohols; Calixarenes; Carboxylic Acids; Hemiterpenes; Mandelic Acids; Molecular Structure; Pentanoic Acids; Phenols; Stereoisomerism; Tartrates