Preparation Of Organic Two-dimensional Structures Based On Covalent Bond And Non-covalent Bond And Their Photocatalytic Coenzyme Regeneration Study

In this paper,we explored the different ways of connecting small molecules into organic two-dimensional structural materials.They were covalent bonds,noncovalent bonds and dynamic reversible covalent bond connections.The synthesis of small molecules was carried out and organic two-dimensional structural materials were constructed on different interfaces by various connection methods.The crystal structure of two-dimensional structural materials were studied in depth.The catalytic properties and electrochemical properties of two-dimensional structural materials were studied.This paper is mainly composed of the following parts:The first part mainly tells the development history of two-dimensional materials systematically,many problems and opportunities that arise in the development process,the great application prospects of two-dimensional materials in the field of materials and the exploration and research in the application field.This part focuses on the development of graphdiyne materials and supramolecular chemistry in the field of two-dimensional materials.It exhibits novel catalytic properties for nitrogen-doped graphdiyne and the dynamic reversible process of supramolecular chemistry is very useful in two-dimensional materials,which is important for providing new ideas to synthesis twodimensional materials.The second part mainly introduces the design and synthesis of small molecular monomers with precise doping of different nitrogen atoms.The Glaser alkyne coupling reaction is carried out by liquid/liquid interface or gas/liquid interface method.Finally,two kinds of two-dimensional nitrogen-doped graphdiyne films were obtained.The two-dimensional nitrogen-doped graphene film was characterized by scanning electron microscopy,transmission electron microscopy and atomic force electron microscopy.The structure of the characteristic groups and the characterization of the elements were carried out by means of XPS,Raman and crystal simulation.Finally,according to the crystal simulation and transmission SAED chart,which shows that two kinds of nitrogendoped graphdiyne materials have only one kind of pores and ABC stacking.Later,the application of nitrogen-doped graphdiyne in photocatalytic coenzyme NADH was studied.The third part mainly describes the synthesis of two-dimensional polymeric materials by supramolecular chemistry through non-covalent bond bonding.The perylene diimide-based triangular molecule and fluorolefin molecule are designed and synthesized,they are spontaneously combined by non-covalent interactions such as ?-? stacking and D-A function with aromatic ring molecules,and assembled into a certain organization of integral chemistry such as nanofibers,nanowires,nanorods and organic two-dimensional films.Finally,only perylene diimide-based triangular molecule were successfully assembled into nanofibers,nanowires and nanorods,which characterized with scanning electron microscop.The electrochemical properties of the perylene imid-based triangular molecules were investigated.