Two-dimensional Layer Polymer Based On Triptycene:Synthesis And Their Performance

The two-dimensional polymers(2DPs), which can be thought of as a monolayer of repeat units connected by robust bonds to give thin sheets, usually have a highly ordered structure and excellent performance of thermal and electrical. The creation of synthetic2 DPs represents an attractive challenge that is ultimately driven by their prospective uses in electronics, biomedicine, sensing, catalysis and as membranes for separation and filtration. Graphene is the 2DPs prototype, by a “top-down” physical exfoliation method from graphite. While the properties of graphene are extraordinary different from graphite.Because of their remarkable properties, the 2DPs begin to be paid more attention, besides,it is a key recent theme that the “bottom-up” approach arising from the milder reaction conditions, which is used to form stable and well-defined 2DPs, and more and more research have been done by scientists. However, the development of this method has been much slower compared to one dimensional and three dimensional analogues. In this paper,we used acetylenic modified triptycene as the monomer to efficiently prepare two dimensional layer polymer under a mild synthetic condition by a modified Glaser coupling reaction. Explored their structures, performance and reaction mechanism, the main research results are as follows:(1)Used triptycene as the raw material, through Sonogashira cross coupling reaction to obtain 2,6,14-triethynyl triptycene, then, used 2,6,14-triethynyl triptyceneas as monomer to efficiently synthesis two dimensional layer polymer based on triethynyl triptycene under a easy and mild synthetic condition. The structures, morphologies,thermodynamic properties and pore properties of the layer polymer were characterized by various physical/chemical characterization methods. Such as NMR, FT-IR, Raman, XRD,TGA, TEM, AFM, gas adsorption and so on. TEM and AFM showed that the layer polymer had a height of about 5 nm and its size can be up to 20 μm. Gas adsorption studies showed that the layer polymer contained a large number of micro pore structures.BET specific surface area was up to 690 m2 g-1.(2)Employed in situ FT-Raman spectroscopy as test method to detect the changes ofalkynes substances, then, study the kinetic behaviors of the homocoupling of terminal alkynes to explore the reaction mechanism. In conclusion, Cu(I) was oxidated to Cu(II)under a O2 atmosphere, and both of Cu(I) and Cu(II) took part in the reaction to generate a gel polymer. O2 played a key role in the reaction. The study of the reaction mechanism is a way to provide a feasible idea for the formation and the mechanism research of 2DPs. And it is the foundation of their applications.