A facile synthetic route to convert Tb( iii ) complexes of novel tetra-1,3-diketone calix[4]resorcinarene into hydrophilic luminescent colloids (original) (raw)

2014, New Journal of Chemistry

The work presents the synthesis of a novel calix[4]resorcinarene cavitand bearing four 1,3-diketone groups at the upper rim and its complex formation with Tb(III) ions in DMF and DMSO solutions. Electrospray ionization mass spectra, 1 H NMR, UV-Vis and luminescence spectra indicate a long (three hours at least) equilibration time for the complex formation between the cavitand and Tb(III) in alkaline DMF and DMSO solutions. These results are explained by the restricted keto-enol conversion, resulting from the steric hindrance effect of the methylenedioxy-groups linking the benzene rings within the cavitand framework.

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A facile synthetic route to convert Tb( iii ) complexes of novel tetra-1,3-diketone calix[4]resorcinarene into hydrophilic luminescent colloids (original) (raw)

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