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Construction of Ideal One-Dimensional Spin Chains by Topochemical Dehydration/Rehydration Route. | LitMetric

Construction of Ideal One-Dimensional Spin Chains by Topochemical Dehydration/Rehydration Route.

J Am Chem Soc

Key Laboratory of Material Chemistry for Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, Huazhong University of Science and Technology, Wuhan 430074, China.

Published: March 2024

AI Article Synopsis

Article Abstract

One-dimensional (1D) Heisenberg antiferromagnets are of great interest due to their intriguing quantum phenomena. However, the experimental realization of such systems with large spin remains challenging because even weak interchain interactions induce long-range ordering. In this study, we present an ideal 1D = 5/2 spin chain antiferromagnet achieved through a multistep topochemical route involving dehydration and rehydration. By desorbing three water molecules from (2,2'-bpy)FeF(HO)·2HO (2,2'-bpy = 2,2'-bipyridyl) at 150 °C and then intercalating two water molecules at room temperature (giving (2,2'-bpy)FeF·2HO ), the initially isolated FeFON octahedra combine to form corner-sharing FeFN octahedral chains, which are effectively separated by organic and added water molecules. Mössbauer spectroscopy reveals significant dynamical fluctuations down to 2.7 K, despite the presence of strong intrachain interactions. Moreover, results from electron spin resonance (ESR) and heat capacity measurements indicate the absence of long-range order down to 0.5 K. This controlled topochemical dehydration/rehydration approach is further extended to (2,2'-bpy)CrF·2HO with = 3/2 1D chains, thus opening the possibility of obtaining other low-dimensional spin lattices.

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Source
http://dx.doi.org/10.1021/jacs.3c13902DOI Listing

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