Department of Applied Chemistry for Environment, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan.
Chemistry. 2019 Jan 2;25(1):167-172. doi: 10.1002/chem.201805119. Epub 2018 Dec 4.
Colloidal semiconductor nanocrystals, so-called quantum dots (QDs), are attractive as molecular-like smart nanomaterials, and their emission and optoelectronic properties in the dispersed state have been actively studied. The construction of supramolecular structures composed of multiple QDs, however, is still challenging. Here, a new strategy to form supramolecular QD structures via self-assembly of perylene bisimide (PBI) dyes is demonstrated. In a mixed solution, QDs and PBI undergo time-dependent fusion to form an isolated colloidal QD-PBI complex or a unique QD-PBI co-aggregate composed of QDs arranged along a sheet-like PBI nanostructure, and these dramatically different supramolecular structures can be controlled by the solvent polarity.
胶体半导体纳米晶体，即所谓的量子点（QDs），作为类似分子的智能纳米材料具有吸引力，其在分散状态下的发射和光电性质已得到积极研究。然而，由多个 QD 组成的超分子结构的构建仍然具有挑战性。在这里，展示了一种通过芘二酰亚胺（PBI）染料自组装形成超分子 QD 结构的新策略。在混合溶液中，QD 和 PBI 经历时变融合，形成孤立的胶体 QD-PBI 复合物或由沿着片状 PBI 纳米结构排列的 QD 组成的独特 QD-PBI 共聚物，这些截然不同的超分子结构可以通过溶剂极性来控制。
