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Tuning the Anionic Configuration in ASc2(P2O7)2 (A = Ba, Pb) through A-Site Cationic Coordination Engineering
Bao Jiang1, Hongheng Chen2, Xianmeng He1
1Key Laboratory of Oil & Gas Fine Chemicals, Ministry of Education & Xinjiang Uyghur Autonomous Region, School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, China.
None:
Rare-earth ions have garnered significant attention due to their large ionic radii and unique electronic configurations. In this study, two scandium-based pyrophosphates, ASc2(P2O7)2 (A = Ba, Pb), were successfully synthesized by using a high-temperature melting method. They are the first reported examples of divalent cations binding to scandium-based pyrophosphates. The anionic backbones in their structures are all based on Sc-P-O frameworks, and two distinct cluster configurations are observed: cyclic [ScP2O10] and linear [ScP2O11] clusters. A comprehensive comparison of Sc/Y-based pyrophosphates reveals a strong correlation between the Sc-P-O configurations and the A-site cationic coordination environments. This work also investigated the influence of cations on the P-O configuration of existing Sc/Y-based pyrophosphates, which also offers useful reference for the synthesis of novel scandium-based phosphates.
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