Host–Guest Engineering of Coordination Polymers for Highly Tunable Luminophores Based on Charge Transfer Emissions

详细信息    查看全文

• 作者：Bei Zhao ; Na Li ; Xi WangZe Chang ; Xian-He Bu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2017
• 出版时间：January 25, 2017
• 年：2017
• 卷：9
• 期：3
• 页码：2662-2668
• 全文大小：481K
• ISSN：1944-8252

文摘

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)(H₂O)₂]·(tpt)·(H₂O)₂ (1) (1,4-H₂pda = 1,4-phenylenediacetic acid), a series of coordination polymers with different PAHs as guests, [Cd₂(tpt)₂(1,4-pda)₂]·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.