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Post-synthetic Anion Exchange in Iron(II) 1,2,4-Triazole Based Spin Crossover Materials via Mechanochemistry

Askew, Jed Hugh, Shepherd, Helena Jane (2020) Post-synthetic Anion Exchange in Iron(II) 1,2,4-Triazole Based Spin Crossover Materials via Mechanochemistry. Dalton Transactions, 49 . pp. 2966-2971. ISSN 1477-9226. (doi:10.1039/C9DT04700J) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided) (KAR id:80046)

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Language: English

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https://doi.org/10.1039/C9DT04700J

Abstract

A facile method for post-synthetic exchange of anions in an iron(II) spin crossover material using mechanochemistry is described. Dry grinding of the [Fe(atrz)\(_3\)]Cl\(_2\) complex (atrz = 4-amino-1,2,4-triazole) in the presence of an excess of sodium halide salt results in the complete exchange of anions and formation of [Fe(atrz)\(_3\)]Br\(_2\) and [Fe(atrz)\(_3\)]I\(_2\) in a solid-state metathesis reaction. The method represents a new strategy for tuning active switching properties such as the transition temperature in spin crossover systems. Formation of stable by-products was identified as a major driving force for exchange and a straightforward method to predict the likely outcome of such reactions using simple thermodynamic considerations is presented.

Item Type: Article
DOI/Identification number: 10.1039/C9DT04700J
Subjects: Q Science > QD Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: Helena Shepherd
Date Deposited: 13 Feb 2020 09:36 UTC
Last Modified: 09 Sep 2020 14:13 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/80046 (The current URI for this page, for reference purposes)
Shepherd, Helena Jane: https://orcid.org/0000-0003-0832-4475
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