Syntheses, Structures, Structural Transformation, and Properties of Neodymium Sulfate Based Inorganic Networks

• Published in: Zeitschrift für anorganische und allgemeine Chemie (1950) Vol. 649; no. 24
• Main Authors: Jiajaroen, Suwadee, Chanthee, Songwuit, Dungkaew, Winya, Kielar, Filip, Sukwattanasinitt, Mongkol, Hayami, Shinya, Chainok, Kittipong
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 13.12.2023
• Subjects: Antiferromagnetism; Chemical synthesis; CO2 adsorption; Corrugated sheet; Dehydration; inorganic network; lanthanide; magnetic properties; Neodymium; structural transformation
• ISSN: 0044-2313; 1521-3749
• DOI: 10.1002/zaac.202300161

Two neodymium sulfate based purely inorganic networks, [NH4][Nd(SO4)2(H2O)3] ⋅ H2O (1) and [Nd2(SO4)3(H2O)4] ⋅ H2O (2) have been synthesized at different reaction temperatures and pH values. The structure of 1 features a two‐dimensional (2D) anionic corrugated sheet with an sql topological net built up by linking NdO8 units and μ2‐SO42− anions, in which the NH4+ charge‐compensating/templating cations occupy the intersheet layers. While 2 possesses a 3D neutral framework with an unprecedented (3,42,7‐c) net constructed by NdO9 units and μ4‐ and μ6‐SO42− linkers. They exhibit thermally induced irreversible structural transformation associated with the dehydration and the changes in coordination geometry and dimensionality. Both compound 1 and 2 display typical antiferromagnetic interactions between the Nd3+ centres. In addition, the CO2 adsorption isotherms of the desolvated samples 1 and 2 were also investigated. In this work, a good example of changing the network structures of rare earth sulfate based purely inorganic networks by synthetic parameters, i. e. pH of the reaction solutions and reaction temperatures, is demonstrated. The compounds exhibit thermally induced irreversible structural transformation associated with the dehydration and the changes in coordination geometry and dimensionality. Their high‐pressure CO2 sorption and magnetic properties were investigated.