Hexagonal Prismatic Siloxanes Functionalized with Organosilyl Groups as Building Blocks of Nanoporous Materials

Utilization of well-defined siloxane molecules allows for the construction of functional siloxane-based nanoporous materials based on the molecular design. Herein, a novel class of siloxane-based porous materials is synthesized via cross-linking of dimethylsilyl- and dimethylvinylsilyl-functionalized cage siloxanes with double-6-ring (D6R) geometry. Compared with the conventional double-4-ring cage siloxane, this study highlights the characteristics of D6R siloxanes as building blocks, demonstrating their high surface area and chemical stability. Furthermore, density functional theory calculations show their unique cation encapsulation ability. A novel class of siloxane-based porous materials is synthesized through the cross-linking of organosilylated cage siloxanes with double-6-ring (D6R) geometry. This material has higher surface area and chemical stability compared with conventional porous materials prepared using double-4-ring cage siloxanes, and also has a potential for unique encapsulation abilities.+ image