Two-dimensional sp 2 carbon–conjugated covalent organic frameworks

Author:

Jin Enquan1ORCID,Asada Mizue2ORCID,Xu Qing1ORCID,Dalapati Sasanka1ORCID,Addicoat Matthew A.3ORCID,Brady Michael A.4ORCID,Xu Hong12ORCID,Nakamura Toshikazu2,Heine Thomas5ORCID,Chen Qiuhong1,Jiang Donglin1ORCID

Affiliation:

1. Field of Energy and Environment, School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi 923-1292, Japan.

2. Department of Materials Molecular Science, Institute for Molecular Science, 38 Nishigo-naka, Myodaiji, Okazaki 444-8585, Japan.

3. School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, UK.

4. Molecular Foundry and Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mailstop 15R0317, Berkeley, CA 94720, USA.

5. Wilhelm-Ostwald-Institute for Physical and Theoretical Chemistry, Leipzig University, Linnéstrasse 2, 04103 Leipzig, Germany.

Abstract

Conjugated covalent networks Although graphene and related materials are two-dimensional (2D) fully conjugated networks, similar covalent organic frameworks (COFs) could offer tailored electronic and magnetic properties. Jin et al. synthesized a fully π-conjugated COF through condensation reactions of tetrakis(4-formylphenyl)pyrene and 1,4-phenylenediacetonitrile. The reactions were reversible, which provides the self-healing needed to form a crystalline material of stacked, π-bonded 2D sheets. Chemical oxidation of this semiconductor with iodine greatly enhanced its conductivity, and the radicals formed on the pyrene centers imparted a high spin density and paramagnetism. Science , this issue p. 673

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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