New Hybrid Layered Molybdates Based on 2/鈭?/sub>[MonO3n+1]2鈥?/sup> Units (n = 7, 9) with Systematic Organic鈥揑norganic Interfaces

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• 作者：Martine Bujoli-Doeuff ; R茅mi Dessapt ; Philippe Deniard ; St茅phane Jobic
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：January 2, 2012
• 年：2012
• 卷：51
• 期：1
• 页码：142-149
• 全文大小：538K
• 年卷期：v.51,no.1(January 2, 2012)
• ISSN：1520-510X

文摘

Two new hybrid organic鈥搃norganic molybdates based on layered ²/_{鈭?/sub>[MonO3n+1]^{2鈥?/sup> blocks and organoammonium cations +(MexH3鈥?i>xN)(CH2)6(NH3鈥?i>xMex)+ (x = 0鈥?), namely, (H3N(CH2)6NH3)[Mo7O22]路H2O (1) and (MeH2N(CH2)6NH2Me)[Mo9O28] (2), have been synthesized under hydrothermal conditions. The 2/鈭?/sub>[Mo9O28]2鈥?/sup> unit in 2 is an unprecedented member of the 2/鈭?/sub>[MonO3n+1]2鈥?/sup> family with the n value extended to 9. The structural filiation between the 2/鈭?/sub>[MonO3n+1]2鈥?/sup> (n = 5, 7, 9) blocks is well established, and their structural similarity with the 2/鈭?/sub>[MoO3] slabs in 伪-MoO3 is also discussed. Single-crystal X-ray analyses show that the 2/鈭?/sub>[MonO3n+1]2鈥?/sup> layers in 1 and 2 are pillared in the three-dimensional networks by the organic cations with a similar connection at the organic鈥搃norganic interface. In addition, a correlation between the topology of the 2/鈭?/sub>[MonO3n+1]2鈥?/sup> blocks in 1 and 2 and the overall sizes of the associated organic cations is pointed out. Finally, the efficiency of Fourier transform Raman spectroscopy to easily discriminate the different 2/鈭?/sub>[MonO3n+1]2鈥?/sup> blocks (n = 5, 7, 9) in hybrid organic鈥搃norganic layered molybdate materials is clearly evidenced.}}