Controllable Assembly of Vanadium-Containing Polyoxoniobate-Based Three-Dimensional Organic–Inorganic Hybrid Compounds and Their Photocatalytic Properties

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• 作者：Jufang Hu ; Yin Wang ; Xinning Zhang ; Yingnan Chi ; Song Yang ; Jikun Li ; Changwen Hu
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：August 1, 2016
• 年：2016
• 卷：55
• 期：15
• 页码：7501-7507
• 全文大小：442K
• 年卷期：0
• ISSN：1520-510X

文摘

The controllable synthesis of two vanadium-containing polyoxoniobate-based three-dimensional organic–inorganic hybrid compounds, [Co(pn)₂]₄[HPNb₁₀V^IV₂O₄₀(V^IVO)₄]·17H₂O (1) and [Co(pn)₂]₅[PNb₁₂O₄₀(V^IVO)₆](OH)₇·15H₂O (2), where pn = 1,2-diaminopropane, is realized by changing the hydrothermal temperature or adding N-(aminoethyl)piperazine as an additive. Both compounds 1 and 2 are structurally characterized by single-crystal/powder X-ray diffraction and IR and X-ray photoelectron spectroscopy. Compound 1 features a new divanadium-substituted Keggin polyoxoniobate capped by four vanadyl groups, and the polyanion in 2 exhibits the highest coordination number (10-connected) in polyoxoniobate chemistry. Moreover, the photocatalytic activities of 1 and 2 for hydrogen evolution are preliminarily assessed.