Non‐Interpenetrated Single‐Crystal Covalent Organic Frameworks. (13th August 2020)

• Record Type: Journal Article
• Authors: Liang, Lin; Qiu, Yi; Wang, Wei David; Han, Jing; Luo, Yi; Yu, Wei; Yin, Guan‐Lin; Wang, Zhi‐Peng; Zhang, Lei; Ni, Jianwei; Niu, Jing; Sun, Junliang; Ma, Tianqiong; Wang, Wei
• Is Part Of: Angewandte Chemie. Volume 132:Number 41(2020)
• Page Start: 18147
• Page End: 18151
• Publication Date: 2020-08-13
• Subjects: 3D COFs -- matrix isolation -- non-interpenetrated frameworks -- single crystals -- solid-state NMR; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202007230
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Growth of covalent organic frameworks (COFs) as single crystals is extremely challenging. Inaccessibility of open‐structured single‐crystal COFs prevents the exploration of structure‐oriented applications. Herein we report for the first time a non‐interpenetrated single‐crystal COF, LZU‐306, which possesses the open structure constructed exclusively via covalent assembly. With a high void volume of 80 %, LZU‐306 was applied to investigate the intrinsic dynamics of reticulated tetraphenylethylene (TPE) as the individual aggregation‐induced‐emission moiety. Solid‐state 2 H NMR investigation has determined that the rotation of benzene rings in TPE, being the freest among the reported cases, is as fast as 1.0×10 4 Hz at 203 K to 1.5×10 7 Hz at 293 K. This research not only explores a new paradigm for single‐crystal growth of open frameworks, but also provides a unique matrix‐isolation platform to reticulate functional moieties into a well‐defined and isolated state. Abstract : A 3D single‐crystal COF with a non‐interpenetrated structure was constructed for the first time. The highly open framework provides a unique matrix‐isolation platform to investigate the intrinsic dynamics of individual AIE moiety.