Aggregated Structures of Two-Dimensional Covalent Organic Frameworks.

ABSTRACT: Covalent organic frameworks (COFs) have found wide applications due to their crystalline structures. However, it is still challenging to quantify crystalline phases in a COF sample. This is because COFs, especially 2D ones, are usually obtained as mixtures of polycrystalline powders. Therefore, the understanding of the aggregated structures of 2D COFs is of significant importance for their efficient utilization. Here we report the study of the aggregated structures of 2D COFs using ¹³C solid-state nuclear magnetic resonance (¹³C SSNMR). We find that ¹³C SSNMR can distinguish different aggregated structures in a 2D COF because COF layer stacking creates confined spaces that enable intimate interactions between atoms/groups from adjacent layers. Subsequently,

SUBMITTER: Kang C 

PROVIDER: S-EPMC9624200 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature