【作者】 郑英璇； 车延科； 赵进才；

【Author】 Yingxuan Zheng;Yanke Che;Jincai Zhao;Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences;

【机构】 中国科学院化学研究所光化学重点实验室；

【摘要】 苝酰亚胺分子1具有复杂的动态自组装过程,包括三个亚稳态(纳米球、微米球、纳米线组成的微米球)和最终的热力学稳定态(微米带)。通过扫描电子显微镜(SEM)和共聚焦激光扫描显微镜(CLSM)观察了整个自组装过程,特别是组成微米球的纳米线束融合形成晶核的过程。更有意思的是,晶核能够在末端直接吸附纳米球增长成带状;同时能够在侧面融合纳米线变宽。为了探索该体系的活性自组装的能力,微米带超声后得到的种子加入到纳米球溶液中后,种子的末端会直接吸附纳米球,并快速增长成带状,这表明该体系具有活性自组装的能力。考虑到纳米级聚集体作为构筑单元实现了活性自组装,而且成核是通过微米球表面纳米线束的融合,该工作向仿生的人工体系又迈进一步。更多还原

【Abstract】 In this work, we report on a complex dynamic supramolecular assembly pathway for a perylene diimide(PDI) derivative; this pathway involves the sequential formation of three kinetically trapped assemblies(i.e., from smooth nanospheres to microspheres to nanofiber microspheres) and thermodynamically stable microribbons. Interestingly, the stable nuclei, which are formed via the fusion of densely entangled nanofibers on the microspheres, enabled the direct anchoring of nanospheres at the termini for the growth of microribbons. Furthermore, we demonstrate the living nature of this system by observing the direct terminal growth of nanospheres on added microribbon seeds under identical self-assembly conditions. Our findings represent a significant step toward artificial systems that are capable of resembling biological systems.更多还原