Silsesquioxane-based porous polymer derived from organic chromophore with AIE characteristics for selective detection of 2,4-dinitrophenol and Ru3+

Abstract

A novel silsesquioxane-based polymers (PCS-DPB) was prepared by the Friedel-Crafts reaction of octavinylsilsesquioxane (OVS) with AIE-active 4-[1-cyano-2-[4-(diphenylamino)phenyl]ethenyl]-α-[[4-(diphenylamino)phenyl]methylene]benzeneea-cetonitrile (CN-DPB). FTIR, solid state 29Si MAS and 13C CP MAS NMR spectroscopy analyses are performed to confirm its chemical structure and the presence of silsesquioxane units in the cross-linked network. XRD and TEM results prove its amorphous feature of the PCS-DPB material. TGA shows a high thermal stability of PCS-DPB with 5% mass loss temperature about 438 °C due to the highly cross-linking density and the presence of the inorganic silsesquioxane cage. The CN-DPB unit endows PCS-DPB with an excellent luminescence and a large red shift of 120 nm, which makes it to act as a probe to detect 2,4-dinitrophenol (DNP) and Ru3+ with high selectivity and sensitivity.