Synthesis and Characterization of Schiff Bases and Cu(II) and Ni(II) Complexes of Polyhedral Oligomeric Silsesquioxane (POSS) Compounds

Abstract

In this study, two different polyhedral oligomeric silsesquioxane (POSS) were synthesized using 3-aminopropyltriethoxysilane (APTES) and N-(2-aminoethyl)-3- aminopropyltrimethoxysilane (AEPTMS). POSS Schiff bases were synthesized as a result of the condensation reaction of POSS compounds with salicylaldehyde and 5-bromosalicylaldehyde. The structures of POSS and its ligand derivatives were by spectroscopic (Elemental analysis (C, H, N), 1HNMR, 29Si-NMR, FT-IR) methods. Cu(II) and Ni(II) metal complexes of Schiff Bases were also synthesized. The structures of the isolated POSS Schiff base metal complexes were tried to be clarified with FT-IR, Magnetic susceptibility balance and ICP-OES. The results showed that metal ions bind to Schiff bases via phenolic oxygen and azomethine nitrogen.