Iron(II) Spin Crossover Complexes with 4,4′-Dipyridylethyne—Crystal Structures and Spin Crossover with Hysteresis

Three new iron(II) 1D coordination polymers with cooperative spin crossover behavior showing thermal hysteresis loops were synthesized using N<sub>2</sub>O<sub>2</sub> Schiff base-like equatorial ligands and 4,4&#8242;-dipyridylethyne as a bridging, rigid axial linker. On...

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Main Authors: Katja Dankhoff, Charles Lochenie, Birgit Weber
Format: Article
Language:English
Published: MDPI AG 2020-01-01
Series:Molecules
Subjects:
Online Access:https://www.mdpi.com/1420-3049/25/3/581
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author Katja Dankhoff
Charles Lochenie
Birgit Weber
author_facet Katja Dankhoff
Charles Lochenie
Birgit Weber
author_sort Katja Dankhoff
collection DOAJ
description Three new iron(II) 1D coordination polymers with cooperative spin crossover behavior showing thermal hysteresis loops were synthesized using N<sub>2</sub>O<sub>2</sub> Schiff base-like equatorial ligands and 4,4&#8242;-dipyridylethyne as a bridging, rigid axial linker. One of those iron(II) 1D coordination polymers showed a 73 K wide hysteresis below room temperature, which, upon solvent loss, decreased to a still remarkable 30 K wide hysteresis. Single crystal X-ray structures of two iron(II) coordination polymers and <i>T</i>-dependent powder XRD patterns are discussed to obtain insight into the structure property relationship of those materials.
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spelling doaj.art-4366949c929d4ea78b551c49e427c1d12022-12-22T03:01:58ZengMDPI AGMolecules1420-30492020-01-0125358110.3390/molecules25030581molecules25030581Iron(II) Spin Crossover Complexes with 4,4′-Dipyridylethyne—Crystal Structures and Spin Crossover with HysteresisKatja Dankhoff0Charles Lochenie1Birgit Weber2Department of Chemistry, Inorganic Chemistry IV, University of Bayreuth, Universitätsstr. 30, 95447 Bayreuth, GermanyDepartment of Chemistry, Inorganic Chemistry IV, University of Bayreuth, Universitätsstr. 30, 95447 Bayreuth, GermanyDepartment of Chemistry, Inorganic Chemistry IV, University of Bayreuth, Universitätsstr. 30, 95447 Bayreuth, GermanyThree new iron(II) 1D coordination polymers with cooperative spin crossover behavior showing thermal hysteresis loops were synthesized using N<sub>2</sub>O<sub>2</sub> Schiff base-like equatorial ligands and 4,4&#8242;-dipyridylethyne as a bridging, rigid axial linker. One of those iron(II) 1D coordination polymers showed a 73 K wide hysteresis below room temperature, which, upon solvent loss, decreased to a still remarkable 30 K wide hysteresis. Single crystal X-ray structures of two iron(II) coordination polymers and <i>T</i>-dependent powder XRD patterns are discussed to obtain insight into the structure property relationship of those materials.https://www.mdpi.com/1420-3049/25/3/581spin crossoverironschiff base ligandhysteresiscooperative interactions
spellingShingle Katja Dankhoff
Charles Lochenie
Birgit Weber
Iron(II) Spin Crossover Complexes with 4,4′-Dipyridylethyne—Crystal Structures and Spin Crossover with Hysteresis
Molecules
spin crossover
iron
schiff base ligand
hysteresis
cooperative interactions
title Iron(II) Spin Crossover Complexes with 4,4′-Dipyridylethyne—Crystal Structures and Spin Crossover with Hysteresis
title_full Iron(II) Spin Crossover Complexes with 4,4′-Dipyridylethyne—Crystal Structures and Spin Crossover with Hysteresis
title_fullStr Iron(II) Spin Crossover Complexes with 4,4′-Dipyridylethyne—Crystal Structures and Spin Crossover with Hysteresis
title_full_unstemmed Iron(II) Spin Crossover Complexes with 4,4′-Dipyridylethyne—Crystal Structures and Spin Crossover with Hysteresis
title_short Iron(II) Spin Crossover Complexes with 4,4′-Dipyridylethyne—Crystal Structures and Spin Crossover with Hysteresis
title_sort iron ii spin crossover complexes with 4 4 dipyridylethyne crystal structures and spin crossover with hysteresis
topic spin crossover
iron
schiff base ligand
hysteresis
cooperative interactions
url https://www.mdpi.com/1420-3049/25/3/581
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AT birgitweber ironiispincrossovercomplexeswith44dipyridylethynecrystalstructuresandspincrossoverwithhysteresis