Hexaazatriphenylene‐Based Two‐Dimensional Conductive Covalent Organic Framework with Anisotropic Charge Transfer

Kim, Seong‐Wook; Jung, Hyeonjung; Okyay, Mahmut Sait; Noh, Hyuk‐Jun; Chung, Sein; Kim, Young Hyun; Jeon, Jong‐Pil; Wong, Bryan M.; Cho, Kilwon; Seo, Jeong‐Min; Yoo, Jung‐Woo; Baek, Jong‐Beom

doi:10.1002/anie.202310560

Hexaazatriphenylene‐Based Two‐Dimensional Conductive Covalent Organic Framework with Anisotropic Charge Transfer (in EN)

Journal Article · Thu Aug 31 00:00:00 EDT 2023 · Angewandte Chemie (International Edition)

DOI:https://doi.org/10.1002/anie.202310560· OSTI ID:2575819

Kim, Seong‐Wook ^[1]; Jung, Hyeonjung ^[1]; Okyay, Mahmut Sait ^[2]; Noh, Hyuk‐Jun ^[3]; Chung, Sein ^[4]; Kim, Young Hyun ^[1]; Jeon, Jong‐Pil ^[1]; Wong, Bryan M. ^[2]; Cho, Kilwon ^[4]; Seo, Jeong‐Min ^[1]; Yoo, Jung‐Woo ^[1]; ^[1]

Ulsan National Institute of Science and Technology (UNIST), Ulsan (Korea, Republic of)
Univ. of California, Riverside, CA (United States)
Dartmouth College, Hanover, NH (United States)
Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of)

Here, the development of covalent organic frameworks (COFs) with efficient charge transport is of immense interest for applications in optoelectronic devices. To enhance COF charge transport properties, electroactive building blocks and dopants can be used to induce extended conduction channels. However, understanding their intricate interplay remains challenging. We designed and synthesized a tailor-made COF structure with electroactive hexaazatriphenylene (HAT) core units and planar dioxin (D) linkages, denoted as HD-COF. With the support of theoretical calculations, we found that the HAT units in the HD-COF induce strong, eclipsed π–π stacking. The unique stacking of HAT units and the weak in-plane conjugation of dioxin linkages leads to efficient anisotropic charge transport. We fabricated HD-COF films to minimize the grain boundary effect of bulk COFs, which resulted in enhanced conductivity. As a result, the HD-COF films showed an electrical conductivity as high as 1.25 S cm⁻¹ after doping with tris(4-bromophenyl)ammoniumyl hexachloroantimonate.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of California, Riverside, CA (United States)

Sponsoring Organization:: National Research Foundation of Korea (NRF); USDOE; USDOE Office of Fossil Energy and Carbon Management (FECM)

Grant/Contract Number:: FE0032208

OSTI ID:: 2575819

Alternate ID(s):: OSTI ID: 2067665

Journal Information:: Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 42 Vol. 62; ISSN 1521-3773; ISSN 1433-7851

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: EN

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