Synthesis and crystal structures of two inorganic–organic hybrid vanadium selenites with layered structures: (DABCOH₂)[(VO₂)(SeO₃)]₂·1.25H₂

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• 作者：Zhaoxun Lian ; Jiamin Zhang ; Yongqing Gu ; Tianxi Wang ; Tianjun Lou
• 关键词：Vanadium selenite ; Templated agent ; Crystal structure ; Inorganic– ; organic hybrid material
• 刊名：Journal of Molecular Structure
• 出版年：2009
• 出版时间：17 February 2009
• 年：2009
• 卷：919
• 期：1-3
• 页码：122-127
• 全文大小：534 K

文摘

The reactions of SeO₂ with V₂O₅ or VOSO₄ in the presence of different organic amine yield two novel vanadium selenites with layered structures, formulated as (DABCOH₂)[(VO₂)(SeO₃)]₂·1.25H₂O 1 (DABCO = 1,4-diazabicyclooctane) and (pipeH₂)[(VO)₂(C₂O₄)(SeO₃)₂] 2 (pipe = piperazidine). Two compounds are characterized with elemental analysis, FT-IR spectrum, TG-DTA analysis and single-crystal X-ray diffraction analysis. In compound 1, two symmetry-related VO₆ units share an edge to form a [V₂O₆] cluster. Each [V₂O₆] cluster is bridged by four SeO₃ units to generate a two-dimensional grid structure. In compound 2, VO₆ units and SeO₃ units share corners to result in a ladder motif. Adjacent chains are interlinked by the oxalate ligands, creating a 2D brick-wall structure, which is firstly observed in V/Se/O system. Diprotonated DABCO and lattice water molecules in 1 and diprotonated piperazidine molecules in 2 are located in the interlayer regions and interact with the framework oxygen atoms via hydrogen bonds, respectively.