1. Hierarchical Spin-Crossover Cooperativity in Hybrid 1D Chains of Fe II -1,2,4-Triazole Trimers Linked by [Au(CN) 2 ] - Bridges.
- Author
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Ezzedinloo L, Zenere KA, Xie Z, Ahmed M, Scottwell S, Bhadbhade M, Brand HEA, Clegg JK, Hua C, Sciortino NF, Parker LC, Powell BJ, Kepert CJ, and Neville SM
- Abstract
Foremost, practical applications of spin-crossover (SCO) materials require control of the nature of the spin-state coupling. In existing SCO materials, there is a single, well-defined dimensionality relevant to the switching behavior. A new material, consisting of 1,2,4-triazole-based trimers coordinated into 1D chains by [Au(CN)
2 ]- and spaced by anions and exchangeable guests, underwent SCO defined by elastic coupling across multiple dimensional hierarchies. Detailed structural, vibrational, and theoretical studies conclusively confirmed that intra-trimer coupling was an order of magnitude greater than the intramolecular coupling, which was an order of magnitude greater than intermolecular coupling. As such, a clear hierarchy on the nature of elastic coupling in SCO materials was ascertained for the first time, which is a necessary step for the technological development of molecular switching materials., (© 2021 Wiley-VCH GmbH.)- Published
- 2021
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