Kershaw Cook, LJ and Halcrow, MA (2015) Doping ruthenium complexes into a molecular spin-crossover material. Polyhedron, 87 (17). 91 - 97. ISSN 0277-5387
Abstract
Two ruthenium compounds, [Ru(κ3C,N,C-bip)2][BF4]2 (bip = 2,6-di{1-methylimidazol-2-ylidene-3-yl}pyridine) and [Ru(terpy)(κ3N,N,C-terpy∗)][BF4]2 (terpy = 2,2′:6′,2″-terpyridine and terpy∗ = 2,2′:6′,4″-terpyridine), have been investigated as dopants for the spin-crossover lattice [Fe(bpp)2][BF4]2 (bpp = 2,6-di{pyrazol-1-yl}pyridine). While [Fe(bpp)2][BF4]2 and [Ru(bip)2][BF4]2 did not co-crystallize, five different compositions of solid solutions [Fe(bpp)2]x[Ru(terpy)(terpy∗)]1-x[BF4]2 were prepared, with 0.96 ≥ x ≥ 0.13. The materials with intermediate compositions (0.58 ≥ x ≥ 0.28) contained a mixture of crystalline and amorphous material by powder diffraction. The spin-crossover midpoint temperature (TF) in [Fe(bpp)2]x[Ru(terpy)(terpy∗)]1-x[BF4]2 decreases smoothly with x, as the larger ruthenium dopant expands the host lattice and stabilizes its high-spin state. That contrasts with our previously published materials [Fe(bpp)2]z[Ru(terpy)2]1-z[BF4]2, which show a more complicated relationship between TF and their composition.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2015, Elsevier Ltd. NOTICE: this is the author’s version of a work that was accepted for publication in Polyhedron. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Polyhedron, 87 (17), 2015, 10.1016/j.poly.2014.10.021 |
Keywords: | Iron; ruthenium; N-donor ligands; 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) |
Depositing User: | Symplectic Publications |
Date Deposited: | 12 Feb 2015 11:28 |
Last Modified: | 30 Jun 2020 14:49 |
Published Version: | http://dx.doi.org/10.1016/j.poly.2014.10.021 |
Status: | Published |
Publisher: | Elsevier Ltd |
Identification Number: | 10.1016/j.poly.2014.10.021 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:83015 |