Stable 2D anti-ferromagnetically coupled fluorenyl radical dendrons

Jian Wang, Gakhyun Kim, María Eugenia Sandoval-Salinas, Hoa Phan, Tullimilli Y. Gopalakrishna, Xuefeng Lu, David Casanova, Dongho Kim, Jishan Wu

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Abstract

We report the first class of stable, two-dimensional (2D) anti-ferromagnetically coupled dendritic polyradicaloids. A kinetically blocked fluorenyl radical was used to build up the first and second generation dendrons FR-G1 and FR-G2 containing three and seven fluorenyl units, respectively. The neighboring fluorenyl radicals in FR-G1 and FR-G2 show moderate anti-ferromagnetic exchange interaction, resulting in a doublet and quartet ground state, respectively, with a small doublet-quartet energy gap. From FR-G1 to FR-G2, the energy gap decreased and the two-photon absorption was enhanced owing to more extended 2D π-conjugation. Both compounds showed multiple redox waves due to their polyradical character.

Original languageEnglish
Pages (from-to)3395-3400
Number of pages6
JournalChemical Science
Volume9
Issue number13
DOIs
Publication statusPublished - 2018

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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    Wang, J., Kim, G., Sandoval-Salinas, M. E., Phan, H., Gopalakrishna, T. Y., Lu, X., Casanova, D., Kim, D., & Wu, J. (2018). Stable 2D anti-ferromagnetically coupled fluorenyl radical dendrons. Chemical Science, 9(13), 3395-3400. https://doi.org/10.1039/c7sc05493a