Evidence of anion-induced dimerization of a squaramide-based host in protic solvents.
The combination of squaramide units with tetraalkylammonium groups leads two hosts that bind distinctively dianions in water-ethanol mixtures. The formation of complexes of 2:1 stoichiometry with host was supported by ITC, fluorescence, and (1)H NMR data.
Piña
M Neus
MN
Department of Chemistry, Universitat de les Illes Balears, 07122 Palma de Mallorca, Spain.
Rotger
Carmen
C
Soberats
Bartomeu
B
Ballester
Pablo
P
Deyà
Pere M
PM
Costa
Antoni
A
D000588:Amines / Q000737:chemistry*; D000838:Anions / Q000737:chemistry; D002151:Calorimetry; D003503:Cyclobutanes / Q000737:chemistry*; D019281:Dimerization; D004923:Erythrosine / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013816:Thermodynamics
D000588:Amines; D000838:Anions; D003503:Cyclobutanes; D000644:Quaternary Ammonium Compounds; D004923:Erythrosine