The synthesis, characterization and the study of aggregation properties in solution of non-coordinating solvents of a series of amphiphilic Zn(salen) derivatives, through detailed 1H NMR, DOSY NMR, and optical absorption spectroscopy investigations, are reported. It is found that these aggregate species are involved in a unique structural interconversion between two defined dimeric species, having a square-base pyramidal (SP) or a trigonal bipyramidal (TBP) coordination around ZnII ion, driven by the polarity and the concentration of water dissolved in the non-coordinating solvent. This behavior may be related to the non-conjugated, conformational flexible nature of the bridging diamine of the Schiff-base.
Zinc(II) salen Schiff-Base complexes: unprecedented aggregation behaviour in solution
Ivan Pietro Oliveri;DI BELLA, Santo;CONSIGLIO, GIUSEPPE;FAILLA, Salvatore;
2012-01-01
Abstract
The synthesis, characterization and the study of aggregation properties in solution of non-coordinating solvents of a series of amphiphilic Zn(salen) derivatives, through detailed 1H NMR, DOSY NMR, and optical absorption spectroscopy investigations, are reported. It is found that these aggregate species are involved in a unique structural interconversion between two defined dimeric species, having a square-base pyramidal (SP) or a trigonal bipyramidal (TBP) coordination around ZnII ion, driven by the polarity and the concentration of water dissolved in the non-coordinating solvent. This behavior may be related to the non-conjugated, conformational flexible nature of the bridging diamine of the Schiff-base.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
