ChemInform Abstract: Hexasulfonated Calix[6]arene Derivatives: A New Class of Catalysts, Surfactants, and Host Molecules.

Abstract

Thc confcrmation in D10 ‐ DMSO‐dö solution of the calix[6]arenes (I), which are prepared for the first time from calix[6]arene by sulfonation and subsequent alkylation, is investigated by 1H NMR.

Self-assembly of tetracationic amphiphiles bearing a calix[4]arene core. Correlation between the core structure and the aggregation properties

“…The detail of the method was described previously. 30 The light-scattering measurements were carried out on an Otsuka Electronics DLS-700 apparatus, The fluorescence measurements were carried out on a Hitachi 650-10s spectrophotometer. Electron microscopy (Hitachi H-500 electron microscope) was used for the observation of the aggregates formed from cone-and 1,3-alternate-2, 1.…”

Chiral calixarene

“…Instead, the peak for the aromatic protons provided clear evidence for the expected conformational change. 4 In the presence of octan-1-01 the peak which was a singlet (6 7.54) at 20 "C split into two peaks (8 = 7.46 and 7.54) at 0 "C, with a coalescence temperature of ca. 10 "C. Such a change in peak shape was not observed in the absence of octan-1-01.…”

“…The chiral calixarene (1) was synthesised from (S)-1-bromo-2-methylbutane and calix [6]arene-p-hexasulphonate in a manner similar to that previously described. 4 The product was identified by i.r. and 400 MHz n.m.r.…”