1. Supramolecular structural control and characteristics of p-hydroxybenzoate intercalated hydrotalcite
- Author
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Hu, Gao-Jie, Wang, Hai-Xia, Ling-Yan, Liu, Pu, Min, He, Jing, and Evans, David G.
- Subjects
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INORGANIC compounds , *MOLECULAR structure , *SUPRAMOLECULAR chemistry , *BENZOATES , *CLATHRATE compounds , *X-ray diffraction , *THERMOGRAVIMETRY , *INFRARED spectroscopy - Abstract
Abstract: p-Hydroxybenzoate pillared layered double hydroxides with different Zn/Al mole ratios have been prepared by three different methods: rehydration of calcined LDH precursor, coprecipitation and anion exchange. The products have been characterized by several experimental techniques: PXRD, FT-IR, TG–DTA and UV–vis. PXRD patterns show that the interlayer distance of p-hydroxybenzoic acid (PHBA)-Zn/Al-LDH varies with ratio Zn/Al, from 14.8 to 15.3Å, indicating that altering Zn/Al ratios can change the arrangement of the intercalated PHBA anions. Not only do infrared spectra display the characteristic absorption of both the PHBA anion and the Zn/Al layer, but also provide further evidence of the interaction between these two parts. Thermal analysis confirms that the intercalation can make PHBA stable up to 434°C, which is 213°C higher than that for pure PHBA. By UV–vis it is found that such a product can control blocking of UV radiation in a wider range of wavelength. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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