Silsesquioxane-Based Hexaphenylsilole-Linked Hybrid Porous Polymer as an Effective Fluorescent Chemosensor for Metal Ions

摘要

Silsesquioxane-based hexaphenylsilole-linked hybrid porous polymers (SHHPP-1, 2, and 3), prepared from one-step Friedel- Crafts reaction of octavinylsilsesquioxane (OVS) and 1, 1, 2, 3, 4, 5-hexaphenylsilole (HPS), have been investigated as potential sensors for heavy metal ions. The results of FTIR, solid state CP/ MASNMR (13C and 29Si) and elemental analysis indicate that HPS unit has been successfully linked to the silsesquioxane framework. These hybrid porous polymers possess high surface areas and bimodal pore structures, and SHHPP-2 possesses a maximum surface area of 1144 m2 *g1 and pore volume of 0.94 cm3 *g1. We have explored the application of these polymers as fluorescent chemosensors. Remarkably, this sensing system exhibits excellent sensitivity toward Fe3+, Ru3 and Cu2+, and a detection limit as low as 107 M is achieved, especially for Fe3+ with observed KSV =53695 M1.