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二维有机组装体是一类具有特殊形貌和性质的有序结构,有可能带来新功能和光电子领域的潜在应用,但如何实现二维有机组装体的可控制备是尚待解决的问题.针对这一问题,我们通过对构筑基元的理性设计,调控分子间的相互作用,发展了三种可控制备二维有机组装体的新方法:(1)利用疏水有机阴离子作为Bola型两亲分子的抗衡离子,能够削弱亲水头基间的静电排斥作用,从而诱导两亲分子的组装结构从一维向二维转变;(2)基于非共价键形成超两亲分子,通过设计和控制超两亲分子的拓扑结构,简便有效地实现二维组装体的制备;(3)通过共价修饰或引入新的非共价键,以限制三维结构在某一方向上的生长,从而降低三维结构的维度,也能实现二维组装体的可控制备.未来,上述研究有望进一步拓展,并实现功能二维有机组装体的构筑.
Two-dimensional organic assemblies are a group of ordered structures with special morphology and properties, which may bring new functions and potential applications in the field of optoelectronics. However, how to realize the controllable preparation of two-dimensional organic assemblies is a problem to be solved In response to this problem, we have developed three new methods for controlled preparation of two-dimensional organic assemblies by rational design of building blocks and the regulation of intermolecular interactions: (1) the use of hydrophobic organic anions as Bola type two The counter ions of the pro-molecules can weaken the electrostatic repulsion between the hydrophilic head groups, thereby inducing the assembly structure of the amphipathic molecules to change from one-dimensional to two-dimensional; (2) the formation of the super-amphiphile molecules based on the non-covalent bonds, And control the topology of the hyper-amphipathic molecule, so as to prepare the two-dimensional assembly conveniently and effectively; (3) to reduce the three-dimensional structure growth in a certain direction through covalent modification or introduction of new non-covalent bonds The three-dimensional structure of the dimension, but also to achieve the two-dimensional assembly controllable preparation in the future, the above study is expected to further expand, and the realization of functional two-dimensional organic assembly.