Gao Rui, Yan Dongpeng
State Key Laboratory of Chemical Resource Engineering , Beijing University of Chemical Technology , Beijing 100029 , P. R. China . Email:
Beijing Key Laboratory of Energy Conversion and Storage Materials , College of Chemistry , Beijing Normal University , Beijing 100875 , P. R. China . Email:
Chem Sci. 2017 Jan 1;8(1):590-599. doi: 10.1039/c6sc03515a. Epub 2016 Sep 6.
Tuning and optimizing the efficiency of light energy transfer play an important role in meeting modern challenges of minimizing energy loss and developing high-performance optoelectronic materials. However, attempts to fabricate systems giving highly efficient energy transfer between luminescent donor and acceptor have achieved limited success to date. Herein, we present a strategy towards phosphorescence energy transfer at a 2D orderly crystalline interface. We first show that new ultrathin nanosheet materials giving long-afterglow luminescence can be obtained by assembling aromatic guests into a layered double hydroxide host. Furthermore, we demonstrate that co-assembly of these long-lived energy donors with an energy acceptor in the same host generates an ordered arrangement of phosphorescent donor-acceptor pairs spatially confined within the 2D nanogallery, which affords energy transfer efficiency as high as 99.7%. Therefore, this work offers an alternative route to develop new types of long-afterglow nanohybrids and efficient light transfer systems with potential energy, illumination and sensor applications.
调整和优化光能转移效率对于应对将能量损失降至最低以及开发高性能光电子材料的现代挑战起着重要作用。然而，迄今为止，制造在发光供体和受体之间实现高效能量转移的系统的尝试仅取得了有限的成功。在此，我们提出了一种在二维有序晶体界面实现磷光能量转移的策略。我们首先表明，通过将芳香族客体组装到层状双氢氧化物主体中，可以获得具有长余辉发光的新型超薄纳米片材料。此外，我们证明，将这些长寿命能量供体与能量受体在同一主体中共组装会产生在二维纳米通道内空间受限的磷光供体 - 受体对的有序排列，其能量转移效率高达99.7%。因此，这项工作为开发具有潜在能量、照明和传感器应用的新型长余辉纳米杂化物和高效光转移系统提供了一条替代途径。
