State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.
Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, P. R. China.
Adv Mater. 2018 Dec;30(50):e1804715. doi: 10.1002/adma.201804715. Epub 2018 Oct 15.
Organic donor-acceptor systems have attracted much attention due to their various potential applications. However, the rational construction and modulation of highly ordered donor-acceptor systems could be a challenge due to the complicated self-assembly process of donor and acceptor species. Considering the well-defined arrangement of species at the molecule level, a crystalline host-guest system could be an ideal platform for the rational construction of donor-acceptor systems. Herein, it is shown how the rational construction of highly tunable donor-acceptor materials can be achieved based on a crystalline host-guest platform. Within the well-established metal-organic framework NKU-111 as the crystalline host enabled by the relatively stable coordination-directed assembly, the introduction and arrangement of guest molecules in the crystals allow the rational construction of the NKU-111⊃guest donor-acceptor system. The donor-acceptor interaction in the systems can be readily modulated with different guest molecules, which can be justified by the well-demonstrated guest-dependent characteristics. Accordingly, the NKU-111⊃guest reveals highly tunable donor-acceptor properties such as charge-transfer-based emissions and electrical conductivity. This work indicates the potential of crystalline host-guest systems as an ideal platform for systematic investigations of donor-acceptor materials.
有机给体-受体体系由于其潜在的各种应用而受到广泛关注。然而，由于给体和受体物种的复杂自组装过程，合理构建和调制高度有序的给体-受体体系可能具有挑战性。考虑到物种在分子水平上的明确排列，结晶主体-客体体系可能是合理构建给体-受体体系的理想平台。本文展示了如何基于结晶主体-客体平台实现高度可调的给体-受体材料的合理构建。在相对稳定的配位导向组装所支持的已建立的金属有机骨架 NKU-111 作为结晶主体内，通过在晶体中引入和排列客体分子，可以合理构建 NKU-111⊃客体给体-受体体系。体系中的给体-受体相互作用可以通过不同的客体分子进行轻松调节，这可以通过充分证明的客体依赖性特征来证明。因此，NKU-111⊃客体表现出高度可调的给体-受体性质，例如基于电荷转移的发光和电导率。这项工作表明，结晶主体-客体体系作为系统研究给体-受体材料的理想平台具有潜力。
