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

doi:10.1039/c7sc05493a

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

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

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 language	English
Pages (from-to)	3395-3400
Number of pages	6
Journal	Chemical Science
Volume	9
Issue number	13
DOIs	https://doi.org/10.1039/c7sc05493a
Publication status	Published - 2018

Bibliographical note

Funding Information:
J. W. acknowledges financial support from MOE Tier 3 programme (MOE2014-T3-1-004). The work at Yonsei University was supported by Global Research Laboratory (2013K1A1A2A02050183) through the National Research Foundation of Korea. D. C. is thankful to Eusko Jaurlaritza and the Spanish Government MINECO/FEDER (projects IT588-13 and CTQ2016-80955).

Funding Information:
J. W. acknowledges nancial support from MOE Tier 3 programme (MOE2014-T3-1-004). The work at Yonsei University was supported by Global Research Laboratory (2013K1A1A2A02050183) through the National Research Foundation of Korea. D. C. is thankful to Eusko Jaurlaritza and the Spanish Government MINECO/FEDER (projects IT588-13 and CTQ2016-80955).

Publisher Copyright:
© 2018 The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

Chemistry(all)

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10.1039/c7sc05493a

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title = "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 π-conjugation. Both compounds showed multiple redox waves due to their polyradical character.",

author = "Jian Wang and Gakhyun Kim and Sandoval-Salinas, {Mar{\'i}a Eugenia} and Hoa Phan and Gopalakrishna, {Tullimilli Y.} and Xuefeng Lu and David Casanova and Dongho Kim and Jishan Wu",

note = "Funding Information: J. W. acknowledges financial support from MOE Tier 3 programme (MOE2014-T3-1-004). The work at Yonsei University was supported by Global Research Laboratory (2013K1A1A2A02050183) through the National Research Foundation of Korea. D. C. is thankful to Eusko Jaurlaritza and the Spanish Government MINECO/FEDER (projects IT588-13 and CTQ2016-80955). Funding Information: J. W. acknowledges nancial support from MOE Tier 3 programme (MOE2014-T3-1-004). The work at Yonsei University was supported by Global Research Laboratory (2013K1A1A2A02050183) through the National Research Foundation of Korea. D. C. is thankful to Eusko Jaurlaritza and the Spanish Government MINECO/FEDER (projects IT588-13 and CTQ2016-80955). Publisher Copyright: {\textcopyright} 2018 The Royal Society of Chemistry.",

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doi = "10.1039/c7sc05493a",

language = "English",

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AU - Wang, Jian

AU - Kim, Gakhyun

AU - Sandoval-Salinas, María Eugenia

AU - Phan, Hoa

AU - Gopalakrishna, Tullimilli Y.

AU - Lu, Xuefeng

AU - Casanova, David

AU - Kim, Dongho

AU - Wu, Jishan

N1 - Funding Information: J. W. acknowledges financial support from MOE Tier 3 programme (MOE2014-T3-1-004). The work at Yonsei University was supported by Global Research Laboratory (2013K1A1A2A02050183) through the National Research Foundation of Korea. D. C. is thankful to Eusko Jaurlaritza and the Spanish Government MINECO/FEDER (projects IT588-13 and CTQ2016-80955). Funding Information: J. W. acknowledges nancial support from MOE Tier 3 programme (MOE2014-T3-1-004). The work at Yonsei University was supported by Global Research Laboratory (2013K1A1A2A02050183) through the National Research Foundation of Korea. D. C. is thankful to Eusko Jaurlaritza and the Spanish Government MINECO/FEDER (projects IT588-13 and CTQ2016-80955). Publisher Copyright: © 2018 The Royal Society of Chemistry.

PY - 2018

Y1 - 2018

N2 - 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.

AB - 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.

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Stable 2D anti-ferromagnetically coupled fluorenyl radical dendrons

Abstract

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