Quinoidal Azaacenes: 99 % Diradical Character

Quinoidal azaacenes with almost pure diradical character (y=0.95 to y=0.99) were synthesized. All compounds exhibit paramagnetic behavior investigated by EPR and NMR spectroscopy, and SQUID measurements, revealing thermally populated triplet states with an extremely low‐energy gap ΔE (ST′) of 0.58 t...

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Autores principales: Intorp, Sebastian N., Hodecker, Manuel, Müller, Matthias, Tverskoy, Olena, Rosenkranz, Marco, Dmitrieva, Evgenia, Popov, Alexey A., Rominger, Frank, Freudenberg, Jan, Dreuw, Andreas, Bunz, Uwe H. F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Communications
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7384067/
https://www.ncbi.nlm.nih.gov/pubmed/32190951
http://dx.doi.org/10.1002/anie.201915977
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author Intorp, Sebastian N.
Hodecker, Manuel
Müller, Matthias
Tverskoy, Olena
Rosenkranz, Marco
Dmitrieva, Evgenia
Popov, Alexey A.
Rominger, Frank
Freudenberg, Jan
Dreuw, Andreas
Bunz, Uwe H. F.
author_facet Intorp, Sebastian N.
Hodecker, Manuel
Müller, Matthias
Tverskoy, Olena
Rosenkranz, Marco
Dmitrieva, Evgenia
Popov, Alexey A.
Rominger, Frank
Freudenberg, Jan
Dreuw, Andreas
Bunz, Uwe H. F.
author_sort Intorp, Sebastian N.
collection PubMed
description Quinoidal azaacenes with almost pure diradical character (y=0.95 to y=0.99) were synthesized. All compounds exhibit paramagnetic behavior investigated by EPR and NMR spectroscopy, and SQUID measurements, revealing thermally populated triplet states with an extremely low‐energy gap ΔE (ST′) of 0.58 to 1.0 kcal mol(−1). The species are persistent in solution (half‐life≈14–21 h) and in the solid state they are stable for weeks.
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spelling pubmed-73840672020-07-28 Quinoidal Azaacenes: 99 % Diradical Character Intorp, Sebastian N. Hodecker, Manuel Müller, Matthias Tverskoy, Olena Rosenkranz, Marco Dmitrieva, Evgenia Popov, Alexey A. Rominger, Frank Freudenberg, Jan Dreuw, Andreas Bunz, Uwe H. F. Angew Chem Int Ed Engl Communications Quinoidal azaacenes with almost pure diradical character (y=0.95 to y=0.99) were synthesized. All compounds exhibit paramagnetic behavior investigated by EPR and NMR spectroscopy, and SQUID measurements, revealing thermally populated triplet states with an extremely low‐energy gap ΔE (ST′) of 0.58 to 1.0 kcal mol(−1). The species are persistent in solution (half‐life≈14–21 h) and in the solid state they are stable for weeks. John Wiley and Sons Inc. 2020-04-28 2020-07-20 /pmc/articles/PMC7384067/ /pubmed/32190951 http://dx.doi.org/10.1002/anie.201915977 Text en © 2020 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Communications
Intorp, Sebastian N.
Hodecker, Manuel
Müller, Matthias
Tverskoy, Olena
Rosenkranz, Marco
Dmitrieva, Evgenia
Popov, Alexey A.
Rominger, Frank
Freudenberg, Jan
Dreuw, Andreas
Bunz, Uwe H. F.
Quinoidal Azaacenes: 99 % Diradical Character
title Quinoidal Azaacenes: 99 % Diradical Character
title_full Quinoidal Azaacenes: 99 % Diradical Character
title_fullStr Quinoidal Azaacenes: 99 % Diradical Character
title_full_unstemmed Quinoidal Azaacenes: 99 % Diradical Character
title_short Quinoidal Azaacenes: 99 % Diradical Character
title_sort quinoidal azaacenes: 99 % diradical character
topic Communications
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7384067/
https://www.ncbi.nlm.nih.gov/pubmed/32190951
http://dx.doi.org/10.1002/anie.201915977
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