Dynamic Manipulating Space‐Resolved Persistent Luminescence in Core–Shell MOFs Heterostructures via Reversible Photochromism. (2nd December 2021)

• Record Type: Journal Article
• Authors: Ma, Yu‐Juan; Fang, Xiaoyu; Xiao, Guowei; Yan, Dongpeng
• Is Part Of: Angewandte Chemie. Volume 134:Number 2(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-12-02
• Subjects: molecular afterglow -- molecular heterojunction -- persistent luminescence -- photochromism -- room temperature phosphorescence; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202114100
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Photo‐controllable persistent luminescence at the single crystal level can be achieved by the integration of long‐lived room temperature phosphorescence (RTP) and photochromism within metal–organic frameworks (MOFs) for the first time. Moreover, the multiblock core–shell heterojunctions have been prepared utilizing the isostructural MOFs through an epitaxial growth process, in which the shell exhibits bright yellow afterglow emission that gradually disappears upon further irradiation, but the core does not show such property. Benefitting from combined persistent luminescence and photochromic behavior, a multiple encryption demo can be facilely designed based on the dynamic manipulating RTP via reversible photochromism. This work not only develops new types of dynamically photo‐controllable afterglow switch, but also provides a method to obtain MOFs‐based optical heterojunctions towards potential space/time‐resolved information encryption and anti‐counterfeiting applications. Abstract : Multiblock core–shell MOFs heterojunctions were prepared through an epitaxial growth process, in which the shell exhibits both persistent luminescence and photochromic properties. The bright yellow afterglow in MOFs shell can be detected before irradiation but almost disappears after coloration upon continuous UV irradiation.