High Efficiency And Cost-effective Construction Of Organic Microporous Polymers Based On Iptycene And Its Derivatives

With the excellent characteristics of low mass density, easy functionality and high stability, organic microporous polymers(OMP) have great potential applications in many fields. However, OMPs with high performance generally require complex monomer, noble metal catalysts and multi-step synthetic steps often leads to the preparation of high cost and large-scale application has thus been greatly restricted. In this paper, in order to prepare OMPs with high efficiency and low-cost, we used iptycene and its derivatives as monomers to form a series of hyper-crosslinked-polymers(HCPs), explored their structures and performance, the main research results are as follows:(1)Using triptycene 1 as monomer, two simple and cost effective synthetic strategies were introduced to prepare two hyper-crosslinked-polymers HCP1 and HCP2. The structures, morphologies, thermodynamic properties and pore properties of these two polymers were characterized by various physical/chemical characterization methods. Gas adsorption studies showed that the HCP1 and HCP2 both contained a large number of micro pore structures, BET specific surface area were up to 1426 g-1 m2 and 942 g-1 m2 respectively, and had excellent performance in gas storage and separation.(2)Choosing HCP1, which had a more superior pore performance, as adsorption material, explored its physical adsorption ability to remove organic pollutants from water. Experimental results showed that HCP1 could adsorb the organic solvent over the range of 1100-3100 wt %, while only uptake less than 100 wt % of water. Additionally, for the water soluble organic dyes, HCP1 could not only adsorb quickly and efficiently, its maximum adsorption amount was also higher than most of the reported adsorption materials.(3)Furthermore, using expanded triptycene(hexaphenylbenzene based triptycene) derivative 2, and pentiptycene derivative 3, which had a similar spatial structure with triptycene, as monomers, to prepare a series of HCPs(HCP3, HCP4, HCP5 and HCP6) by the same strategies mentioned above. The structure features of these materials were studied, and their applications in the field of gas storage and separation were also explored.