Journal
ORGANIC & BIOMOLECULAR CHEMISTRY
Volume 9, Issue 9, Pages 3225-3234Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0ob01251c
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Funding
- Federal Program Research and scientific-pedagogical cadres Innovative Russia [P1107]
- Russian Federation [MD-2747.2010.3]
- RFBR [09-03-00426, 10-03-92661-NSF]
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New p-tert-butyl thiacalix[4]arenes differently substituted at the lower rim with amide, hydroxyl and ester groups were synthesized. Binding properties of the compounds toward some tetrabutylammonium salts n-Bu4NX (X = F-, Cl-, Br-, I-, CH3CO2-, H2PO4-, NO3-) were studied by UV spectroscopy. It was found that the stoichiometry of the complexes, generally, is 1 : 1, and the association constants are in the range of 10(3)-10(5) M-1. The p-tert-butyl thiacalix[4] arenes containing secondary amide groups trisubstituted at the lower rim bind the studied anions most effectively. Selective receptors for fluoride and dihydrogen phosphate salts of tetrabutylammonium were found.
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