Halcrow, MA orcid.org/0000-0001-7491-9034 and Chastanet, G (2017) Spin-Crossover and the LIESST Effect in [FexCo1–x(bpp)2][BF4]2 (1.00 ⩽ x ⩽ 0.77). Comparison with Bifunctional Solid Solutions of Iron and Cobalt Spin-Crossover Centers. Polyhedron, 136. pp. 5-12. ISSN 0277-5387
Abstract
Co-crystallization of [Fe(bpp)2][BF4]2 and [Co(bpp)2][BF4]2 (bpp = 2,6-di{pyrazol-1-yl}pyridine) from nitromethane-diethyl ether yields homogeneous polycrystalline materials analysing as [FexCo1–x(bpp)2][BF4]2 (1.00 ⩽ x ⩽ 0.77). Thermal spin-crossover in these materials only involves the iron centers, and increasing the cobalt dopant concentration leads to a reduction in T½ and a loss of cooperativity. The materials exhibit the LIESST effect, with all three samples presenting the same T(LIESST) value. LIESST relaxation kinetics have a clear multistep character, which has not been detected before in samples derived from [Fe(bpp)2][BF4]2. Magnetic susceptibility and low-temperature crystallographic data are also presented for the pure precursor complex [Co(bpp)2][BF4]2.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 Elsevier Ltd. This is an author produced version of a paper published in Polyhedron. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Iron; Cobalt; N-donor ligand; Spin-crossover; Magnetic measurements |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Inorganic Chemistry (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 01 Feb 2017 09:49 |
Last Modified: | 29 Jan 2018 01:38 |
Published Version: | https://doi.org/10.1016/j.poly.2017.01.029 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.poly.2017.01.029 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:111499 |