A para-substituted bis(3-aminopropyl)hexaisobutyl-polyhedral oligomeric silsesquioxane (POSS) was successfully synthesized via a selective corner-opening reaction of 3-aminopropylheptaisobutyl-POSS and a subsequent corner-capping reaction. The selectivity of the corner-opening reaction was studied by density functional theory calculations. Polymerization of the POSS monomer with pyromellitic dianhydride resulted in a yellow, self-standing film.
We first time prepared main‐chain type cage octasilsesquioxane (T8) containing coordination polymers based on transition metal complexes with a bis‐Schiff base T8 ligand (bis‐SA‐T8), which was prepared from para‐bis(3‐aminopropyl)hexaisobutyl‐substituted T8 cage (bis‐T8) with salicylaldehyde. A mono‐Schiff base T8 ligand (SA‐T8) was prepared from 3‐aminopropylheptaisobutyl‐substituted T8 cage (mono‐T8)