Hierarchical Spin-Crossover Cooperativity in Hybrid 1D Chains of Fe-II-1,2,4-Triazole Trimers Linked by [Au(CN)(2)](-) Bridges
Lida Ezzedinloo, Katrina A Zenere, Zixi Xie, Manan Ahmed, Synove Scottwell, Mohan Bhadbhade, Helen EA Brand, Jack K Clegg, Carol Hua, Natasha F Sciortino, Lachlan C Parker, Benjamin J Powell, Cameron J Kepert, Suzanne M Neville
CHEMISTRY-A EUROPEAN JOURNAL | WILEY-V C H VERLAG GMBH | Published : 2021
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..View full abstract
Awarded by ARC
We acknowledge support from Fellowships and Discovery Project funding from the Australian Research Council (ARC). Access and use of the facilities of the Australian Synchrotron was supported by ANSTO. J.K.C. acknowledges the support of the ARC through LE170100144. We thank Ross McKenzie for helpful conversations.