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Stable 2D anti-ferromagnetically coupled fluorenyl radical dendrons.


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 ?-conjugation. Both compounds showed multiple redox waves due to their polyradical character.

SUBMITTER: Wang J 

PROVIDER: S-EPMC5933225 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature

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Stable 2D anti-ferromagnetically coupled fluorenyl radical dendrons.

Wang Jian J   Kim Gakhyun G   Sandoval-Salinas María Eugenia ME   Phan Hoa H   Gopalakrishna Tullimilli Y TY   Lu Xuefeng X   Casanova David D   Kim Dongho D   Wu Jishan J  

Chemical science 20180228 13


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 <b>FR-G1</b> and <b>FR-G2</b> containing three and seven fluorenyl units, respectively. The neighboring fluorenyl radicals in <b>FR-G1</b> and <b>FR-G2</b> show moderate anti-ferromagnetic exchange interaction, resulting in a doublet and quartet ground state, respectively, with a s  ...[more]

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