Synthesis And Applications Of Tetraphenylethene-based Porous Polymers

Porous polymers have excellent potential applications in gas storage and separation,heterogeneous catalysis,chemosensors,environmental protection,et al and have received great attention.Tetraphenylethene(TPE)is a typical aggregation induced emission molecule(AIE)and ideal building block to prepare porous materials.In this paper,two porous polymers are prepared with TPE as a building block by different polymerization methods and studied their applications in detection and dye adsorption,which containing the following two aspects:1.Tetraphenylethylene(TPE)with double helix structure was used to prepare a porous material(denoted as TPE-OCP)via oxidative coupling polymerization.The resulted TPE-OCP was characterized.TPE-OCP exhibited a good thermal stability and a bimodal porosity.The specific surface area is up to 602 m2 g-1.The maximum adsorption capacity of porous polymer for toxic organic dyes was up to 105 mg g-1 for Rhodamine B(RB),276 mg g-1 for Methylene Blue(MB)and 96 mg g-1 for Methyl orange(MO),respectively.2.Hybrid silsesquioxane-based TPE-bridged multifunctional fluorescent hybrid porous materials have been synthesized by the Friedel-Crafts reaction of octavinylsilsesquioxane(OVS)with TPE.These hybrid porous polymers exhibited high surface area of up to 1910 m2 g-1,high fluorescence intensity and good thermal stability.More interestingly,hybrid polymers exhibited similar a bimodal porosity,i.e.micropores centered at about 1.4 nm and mesopores centered at about 4.5 nm.More importantly,these materials exhibited highly size-selective adsorption for dye molecules.The adsorption capacity of HPP-3 achieved as high as 1666 mg g-1 for RB,1040 mg g-1 for Congo red(CR)and 862 mg g-1 for Crystal violet(CV),respectively.It also showed high sensitivity for Fe3+,Cu2+ and Ru3+,especially for Fe3+ withKSV=140k M-1.