Naphthyl amines as novel organoimido ligands for design of POM-based organic-inorganic hybrids: Synthesis, structural characterization, and supramolecular assembly of (Bu4N)(2)[Mo6O18N(Naph-1)]

摘要

A novel naphthylimido derivative of hexamolybdate, (Bu4N)(2)[Mo6O18N(Naph-1)] ( 1), was synthesized for the first time by the reaction of octamolybdate ion and 1-naphthyl amine hydrochloride with DCC (N, N,-dicyclohexylcarbodiimide) as a dehydrating agent. The ultraviolet-visible absorption spectrum shows the lowest energy electronic transition of 1 occurs at 383 nm, which is dramatically red-shifted compared to that of [Mo6O19](2-) and other monosubstituted phenylimido hexamolybdates reported in the literature. Moreover, cyclic voltammetry studies on compound 1 show the reversible reduction wave at - 0.53 V, which is cathodically shifted relative to that of [Mo6O19](2-). Another interesting characteristic of 1 is that the cluster anions form supramolecular 1D chains via C- H center dot center dot center dot O hydrogen bonding interactions.