天然二维聚合物石墨烯的发现引发了过去十年人们对各种二维材料的持续探索，但人工合成的具有精确晶格结构的二维聚合物单晶及其单分子膜的制备直到最近才有了突破性进展。鉴于其在膜分离和光电材料领域巨大的应用潜力，有必要对其制备过程中单体结晶这一重要环节进行深入研究。本课题针对其中一种易于工业化的基于蒽和均三嗪的三叶双层转子式单体，拟在其结晶热力学和动力学研究基础上，控制单体单晶的晶型和晶习，揭示混合溶剂体系与单体单晶、二维聚合物单晶及其单分子膜之间的相互作用关系，从而实现单体单晶的可控生长。进而将单晶法制备二维聚合物中的各个步骤（单体的合成与结晶、光聚合反应和单分子层剥离）进行整合优化，建立一套制备厚度均匀的大尺寸自支持单分子膜方法，以加速其工业化进程，并推进其在上述领域中的应用开发。

The discovery of graphene, a naturally occurring two-dimensional polymer, has initiated the continued explorations into different kinds of two-dimensional materials. However until recently, there was a breakthrough in the synthetic two-dimensional polymer single-crystals with precise crystallographic structures and the preparation of its monolayers. In light of its enormous potential applications in the fields of membrane separation and photoelectric materials, it is necessary to conduct in-depth studies on the important part of the preparation process of the monolayers, i.e. the crystallization process of the monomer. This project aimed at one of these monomers, which is a double-decker rotor-like monomer with three blades based on anthracene and s-triazine and easy to industrialize. On account of the research on crystallization thermodynamics and kinetics, the polymorph and morphology of the monomer single-crystals will be controlled. Also the interactions between the mixed solvent systems and the monomer single-crystals, two-dimensional polymer single-crystals and monolayers will be revealed to realize the controllable growth of the monomer single-crystals. And thus all the steps of the single-crystal method (synthesis and crystallization of the monomer, photopolymerization of the monomer single-crystals, and exfoliation into monolayers) for preparation of two-dimensional polymers will be integrated and optimized. A method to prepare free-standing large-size monolayers with uniformity of thickness will be constructed to accelerate its industrialization process, therefore advance the development of its applications in the above mentioned fields.