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Amine‐Functionalized Spin Crossover Building Blocks

Bistable spin crossover complexes such as [Fe{HB(pz)(3)}(2)] (pzH = pyrazole) show promise for sensor applications and electrically‐controlled data storage units, but exploiting their potential hinges on their integration into a functional environment. We here present a system enabling such covalent...

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Detalles Bibliográficos
Autores principales: Flötotto, Henrik, Secker, Tim, Kögerler, Paul, Besson, Claire
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6919924/
https://www.ncbi.nlm.nih.gov/pubmed/31894180
http://dx.doi.org/10.1002/ejic.201900916
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author Flötotto, Henrik
Secker, Tim
Kögerler, Paul
Besson, Claire
author_facet Flötotto, Henrik
Secker, Tim
Kögerler, Paul
Besson, Claire
author_sort Flötotto, Henrik
collection PubMed
description Bistable spin crossover complexes such as [Fe{HB(pz)(3)}(2)] (pzH = pyrazole) show promise for sensor applications and electrically‐controlled data storage units, but exploiting their potential hinges on their integration into a functional environment. We here present a system enabling such covalent post‐functionalization steps in both symmetric and asymmetric patterns, based on the amine‐functionalized complex [Fe{HB(4‐NH(2)pz)(pz)(2)}(2)], obtained by reduction of the nitro analogue. The building block aspects of [Fe{HB(4‐NH(2)pz)(pz)(2)}(2)] are showcased by its transformation into amide, imine and azo derivatives, which are structurally and magnetically characterized. All tris(pyrazolyl)borate complexes retain the spin crossover properties of their parent compound, with spin crossover temperatures ranging from 350 to 430 K. The transition parameters are correlated with the electronic properties of the functionalizing group, opening the possibility of fine‐tuning the spin crossover properties of the building block as it is integrated in the environment of choice.
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spelling pubmed-69199242019-12-30 Amine‐Functionalized Spin Crossover Building Blocks Flötotto, Henrik Secker, Tim Kögerler, Paul Besson, Claire Eur J Inorg Chem Communications Bistable spin crossover complexes such as [Fe{HB(pz)(3)}(2)] (pzH = pyrazole) show promise for sensor applications and electrically‐controlled data storage units, but exploiting their potential hinges on their integration into a functional environment. We here present a system enabling such covalent post‐functionalization steps in both symmetric and asymmetric patterns, based on the amine‐functionalized complex [Fe{HB(4‐NH(2)pz)(pz)(2)}(2)], obtained by reduction of the nitro analogue. The building block aspects of [Fe{HB(4‐NH(2)pz)(pz)(2)}(2)] are showcased by its transformation into amide, imine and azo derivatives, which are structurally and magnetically characterized. All tris(pyrazolyl)borate complexes retain the spin crossover properties of their parent compound, with spin crossover temperatures ranging from 350 to 430 K. The transition parameters are correlated with the electronic properties of the functionalizing group, opening the possibility of fine‐tuning the spin crossover properties of the building block as it is integrated in the environment of choice. John Wiley and Sons Inc. 2019-09-12 2019-11-24 /pmc/articles/PMC6919924/ /pubmed/31894180 http://dx.doi.org/10.1002/ejic.201900916 Text en © 2019 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-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
spellingShingle Communications
Flötotto, Henrik
Secker, Tim
Kögerler, Paul
Besson, Claire
Amine‐Functionalized Spin Crossover Building Blocks
title Amine‐Functionalized Spin Crossover Building Blocks
title_full Amine‐Functionalized Spin Crossover Building Blocks
title_fullStr Amine‐Functionalized Spin Crossover Building Blocks
title_full_unstemmed Amine‐Functionalized Spin Crossover Building Blocks
title_short Amine‐Functionalized Spin Crossover Building Blocks
title_sort amine‐functionalized spin crossover building blocks
topic Communications
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6919924/
https://www.ncbi.nlm.nih.gov/pubmed/31894180
http://dx.doi.org/10.1002/ejic.201900916
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