High Charge Carrier Mobility in Non-Conjugated 3D Covalent Organic Frameworks.
basic_science · Level V
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- Record sourced from PubMed, PMID 41631550.
- Also identified by DOI 10.1002/adma.202517211.
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Abstract
π-Conjugation, π-π stacking, and long-range order play a central role in determining charge transport efficiency in organic materials. Covalent organic frameworks (COFs), which uniquely integrate these key structural and electronic features, have emerged as a promising platform for the development of novel electrically conductive organic materials. Intraframework π-conjugation has shown to play a key role in improving charge carrier mobility. Here, we report Joa-COF-2, a 3D COF lacking extended intraframework π-conjugation, yet exhibiting a remarkable charge carrier mobility of 14 ± 1 cm<sup>2</sup> V<sup>-1</sup> s<sup>-1</sup>. Joa-COF-2 adopts an 11-fold interpenetrated dia topology, featuring a tight interframework π-π stacking, which enables efficient charge transport in the absence of intraframework π-conjugation.