Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing, 100190, P.R. China.
University of Chinese Academy of Sciences, Beijing, 100049, P.R. China.
Angew Chem Int Ed Engl. 2017 Aug 21;56(35):10352-10356. doi: 10.1002/anie.201702084. Epub 2017 May 19.
Two typical types of luminescent organic cocrystals comprising pyrene-octafluoronaphthalene (pyrene-OFN) and pyrene-1,2,4,5-tetracyanobezene (pyrene-TCNB) were developed by a simple supramolecular assembly strategy. The cocrystals exhibit distinct optical properties because of their different intermolecular interaction modes; that is, arene-perfluoroarene (AP) and charge-transfer (CT) interactions. Unexpectedly, a pyrene-TCNB system with strong CT interactions was incorporated into a pyrene-OFN host as a robust guest to generate white-light emission (WLE). In the supramolecular cocrystal system, an efficient energy-transfer process from pyrene-OFN to pyrene-TCNB occurred because of the well-matched spectra of the constituents and a desirable energy donor/acceptor (D/A) distance. The present competitive intermolecular interaction strategy could be applied to the fabrication of more complicated organic light-harvesting systems.
两种典型的发光有机同晶，包括芘-全氟萘（pyrene-OFN）和芘-1,2,4,5-四氰基苯（pyrene-TCNB），是通过简单的超分子组装策略开发的。由于不同的分子间相互作用模式，即芳烃-全氟芳烃（AP）和电荷转移（CT）相互作用，这些同晶显示出独特的光学性质。出乎意料的是，具有强 CT 相互作用的 pyrene-TCNB 系统被掺入 pyrene-OFN 主体中作为稳定的客体，以产生白光发射（WLE）。在超分子同晶体系中，由于组成部分的光谱匹配良好和理想的供体/受体（D/A）距离，从 pyrene-OFN 到 pyrene-TCNB 发生了有效的能量转移过程。目前的竞争分子间相互作用策略可应用于更复杂的有机光收集系统的制造。
