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Updated: May 20, 2025
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Exploring pseudohalide substitution in α-cobalt-based layered hydroxides
Youssra Diouane1, Alvaro Seijas-Da Silva1, Víctor Oestreicher1
1Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltrán Martínez, 2, 46980 Paterna, Valencia, Spain. gonzalo.abellan@uv.es.
Abstract:
While halide substitution has significantly influenced the electrical and magnetic properties of α-layered hydroxide frameworks (α-LH), the incorporation of pseudohalides remains limited. In this study, we present a detailed investigation of two-dimensional cobalt-layered hydroxides modified with tricyanomethanide (C4N3-) and thiocyanate (SCN-) pseudohalides, synthesized via a simple epoxide route at room temperature. Pseudohalide incorporation induces subtle structural modifications relative to pristine cobalt-chloride layered hydroxide (α-Co-Cl), including changes in interlayer spacing and the confirmation of a distinct bridging coordination in thiocyanate-modified samples. Magnetic measurements reveal broadly similar behavior across all samples, with the thiocyanate compound reflecting a structural difference that affects its magnetic response. These findings underscore the influence of pseudohalides on the structure and the effect of pseudohalide substitution on the magnetic response of α-cobalt-based layered hydroxides, demonstrating the chemical and structural versatility of Simonkolleite-like hydroxides as tunable materials for designing novel hybrids with dynamic structures.
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