Transition-metal ion modified monolacunary tungstates: Synthesis, structural characterization and property

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• 作者：Xiaofang Zhao ; Jinshuang Yan ; Xiaolong Xue ; Zhangang Han ; ^{hanzg116@126.com" class="auth_mail} ; Shuo Cui ; Luyan Zong ; Demin Zheng ; Chen Shen ; Haitao Yu ; Xueliang Zhai ; ^{xlzhai253@mail.hebtu.edu.cn" class="auth_mail}
• 关键词：Polyoxometalate ; Monolacunary ; Chain structure ; Hydrothermal synthesis ; Photocatalytic activity
• 刊名：Inorganica Chimica Acta
• 出版年：1 April, 2014
• 年：2014
• 卷：414
• 期：Complete
• 页码：46-52
• 全文大小：1745 K

文摘

Two organic-inorganic hybrids (H₂bpp)₄[PW₁₁CuO₃₉][PW₁₂O₄₀] (1) (bpp = 1,3-di(4-pyridyl)propane), H₅(bpe)₃[SiW₁₁CoO₃₉]路2H₂O (2) (bpe = 1,2-di(4-pryridyl)ethylene) have been hydrothermally synthesized and characterized by IR, UV, powder and single crystal X-ray diffraction. The analysis results reveal that both of two compounds contain one-dimensional polyanionic chains of monosubstituted Keggin clusters through M-O-M (M = Cu/W/Co) linkages. In the crystal framework of 1 there are two types of nanosized polyanionic clusters of classic saturated Keggin-type [PW₁₂O₄₀]^{3鈭?/sup> and Cu-doped [PW₁₁CuO₃₉]5鈭?/sup> anions. The protonated discrete organic substrates either flexible bpp in 1 or rigid bpe in 2 are attached to the surrounding of polyanions via non-covalent interactions. The photoluminescence emissions of 1 and 2 in CH₃OH solution at room temperature have been investigated. The photocatalytic activity of two complexes for methylene blue (MB) degradation under UV irradiation is explored.}