Circularly Polarized Room‐Temperature Phosphorescence and Encapsulation Engineering for MOF‐Based Fluorescent/Phosphorescent White Light‐Emitting Devices. Issue 13 (4th May 2020)

• Record Type: Journal Article
• Authors: Fu, Hong‐Ru; Wang, Ning; Wu, Xiao‐Xia; Li, Fei‐Fei; Zhao, Ying; Ma, Lu‐Fang; Du, Miao
• Is Part Of: Advanced optical materials. Volume 8:Issue 13(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-05-04
• Subjects: circularly polarized luminescence -- host–guest system -- metal–organic frameworks -- room temperature phosphorescence -- white light emitting devices; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.202000330
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract: Optical materials with circularly polarized luminescence and room temperature phosphorescence currently attract great attention owing to their unique optoelectronic properties. Herein, via the coordination‐induced assembly strategy, a homochiral metal–organic framework (MOF) 1 with high stability and porosity is successfully synthesized by using the achiral triphenylamine‐based molecule as the building block. Remarkably, MOF 1 shows circularly polarized luminescence and phosphorescence at room temperature simultaneously, also with excellent anisotropic optical properties. Furthermore, MOF 1 can serve as a nanocontainer to construct dye‐encapsulated host–guest systems. Importantly, the multicolor emissions including white‐light emission can be achieved. The corresponding color rendering index and correlated color temperature values of light emitting device are 73 and 5541 K, when using dye‐loaded MOF 1⊃RhB 10 (CIE: 0.33, 0.33) as single‐phase white light‐emitting phosphor. This study first reports circularly polarized phosphorescence based on MOF without precious metals under ambient conditions, and also is first time for phosphorescent polarized materials with high porosity. These results will open up a new pathway to the design of porous chiroptical materials and white‐light materials. Abstract : A homochiral metal–organic framework (MOF) with high stability and porosity is prepared via coordination‐induced assembly of Cd(II) with the achiral triphenylamine‐based ligand. It represents the first MOF material with circularly polarized phosphorescence at room temperature. Furthermore, the multicolor emission, including white‐light emission, can be successfully achieved via the encapsulation of guest dyes into this MOF matrix.