School of Materials Science and Engineering, National Institute for Advanced Materials, Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University , Tianjin 300350, China.
Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China.
ACS Appl Mater Interfaces. 2017 Jan 25;9(3):2662-2668. doi: 10.1021/acsami.6b14554. Epub 2017 Jan 12.
Aiming at the targeted construction of coordination polymer luminophores, the engineering of host-guest architectures with charge transfer based emissions is performed by utilizing the interactions between the electron-deficient 2,4,6-tri(pyridin-4-yl)-1,3,5-triazine (tpt) and electron-rich polycyclic aromatic hydrocarbons (PAHs) motifs as acceptors and donors, respectively. Through guest modulation of a prototype coordination polymer [Cd(tpt)(1,4-pda)(HO)]·(tpt)·(HO) (1) (1,4-Hpda = 1,4-phenylenediacetic acid), a series of coordination polymers with different PAHs as guests, [Cd(tpt)(1,4-pda)]·guest (2-5) (guest = triphenylene for 2, pyrene for 3, coronene for 4, and perylene for 5), are successfully fabricated. Distinct from 1, coordination polymers 2-5 reveal unique bilayer structures with PAHs interlayer and good stability, owing to the enhanced stacking interactions between tpt motifs and PAH guests. Moreover, their emissions cover a wide range of wavelength due to the effective guest to host charge transfer interactions between donor and acceptor motifs. Their readily tunable host-guest charge transfer based emissions make them good candidates as potential luminophores.
针对配位聚合物发光体的靶向构建，通过利用电子缺的 2,4,6-三（吡啶-4-基）-1,3,5-三嗪（tpt）和富电子多环芳烃（PAHs）基元之间的相互作用，分别作为受体和供体，来进行基于电荷转移的主体-客体结构的工程设计。通过对原型配位聚合物[Cd(tpt)(1,4-pda)(HO)]·(tpt)·(HO)（1）（1,4-Hpda=1,4-苯二乙酸）的客体调制，一系列具有不同 PAHs 作为客体的配位聚合物，[Cd(tpt)(1,4-pda)]·客体（2-5）（客体=三联苯为 2，芘为 3，蒄为 4，苝为 5），被成功制备。与 1 不同，配位聚合物 2-5 由于 tpt 基元和 PAH 客体之间增强的堆积相互作用，揭示了具有独特双层结构的 PAHs 层间结构和良好的稳定性。此外，由于供体和受体基元之间有效的客体到主体的电荷转移相互作用，它们的发射涵盖了很宽的波长范围。它们易于调节的基于主体-客体电荷转移的发射使它们成为潜在发光体的良好候选物。
