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Intercalation Assembly and Characterization of the Supramolecular Structure of Maleic Acid Anions Column Pillared Layered Double Hydroxides |
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Abstract: Mg-Al Layered Double Hydroxides (Mg-Al-LDHs) have unique structural memory effect. Used it as front body, maleate anions were inserted into layers by back mixing precipitation method. The maleic acid anions column pillared hydrotalcites were synthesized. The samples prepared were characterized by X-Ray Diffraction (XRD), Fourier transform infrared (FTIR) and Differential Thermal Analysis (DTA). The results show that the initial interlayer carbonate ions can be completely replaced by the maleic acid anions under controlled condition. The expansion of the inter layer spacing from 0.76 nm to 1.10 nm, with nanoscale supramolecular structure. As can be seen from FTIR and XRD, maleic acid anions were inserted into the space between layers in spite of action force between layers, held open layers. This generated stronger interaction force with layers. Supermolecular structure of column pillared LDHs of maleic acid anions were weaker interaction force between layers. The object and main body were linked by ion bond, hydrogen bond and van der Waals gravitation and arranged regularly. Inorganic organic composite materials of column pillared with supermolecular structure were assembled. The structure models were presented. Thermal stability was improved. It is 465℃.
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Received: 14 April 2009
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Corresponding Authors:
Zhao Wei
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