AbstractThis study reports the design of a donor‐acceptor (D‐A) molecule with two fluorene units on each side of a benzothiadiazole moiety, which allows multiple intermolecular interactions to compete with one another so as to induce the evolution of the metastable 2D platelets to the stable 2D platelets during the self‐assembly of the D‐A molecule. Importantly, the living seeded self‐assembly of metastable and stable 2D structures with precisely controlled sizes can be conveniently achieved using an appropriate supersaturated level of a solution of the D‐A molecule as the seeded growth medium that can temporarily hold the almost‐proceeding spontaneous nucleation from competing with the seeded growth. The stable 2D platelets with smaller area sizes exhibit higher sensitivity to gaseous dimethyl sulfide, illustrating that the novel living self‐assembly method provides more available functional structures with controlled sizes for practical applications. The key finding of this study is that the new living methodology is separated into two independent processes: the elaborate molecular design for various crystalline structures as seeds and the application of a supersaturated solution with appropriate levels as the growth medium to grow the uniform structures with controlled sizes; this would make convenient and possible the living seeded self‐assembly of rich 1D, 2D, and 3D architectures.
 
                                    摘要 本研究报告介绍了一种在苯并
噻二唑分子两侧各含有两个
芴单元的供体-受体(D-A)分子的设计,它允许多种分子间相互作用相互竞争,从而在 D-A 分子的自组装过程中诱导可褪色的二维小板向稳定的二维小板演化。重要的是,使用适当过饱和
水平的 D-A 分子溶液作为种子生长介质,可以方便地实现具有精确控制尺寸的可褪色和稳定二维结构的活种子自组装,从而暂时阻止几乎即将发生的自发成核与种子生长竞争。面积尺寸较小的稳定二维小板对气态
二甲基硫醚表现出更高的敏感性,说明这种新型活体自组装方法为实际应用提供了更多尺寸可控的功能结构。这项研究的主要发现是,新的活体方法分为两个独立的过程:精心设计作为种子的各种晶体结构的分子,以及应用具有适当浓度的过饱和溶液作为生长介质来生长具有可控尺寸的均匀结构;这将使丰富的一维、二维和三维结构的活体种子自组装变得方便和可能。