Supramolecular Assembly of Methyl Orange-pillared Hydrotalcite and Its Light and Thermal Stability

Abstract

Abstract: Methyl orange is one of acid dyes, but its range of use is greatly limited because of its low light and thermal stability. Methyl orange anion-pillared hydrotalcites were successfully assembled by an ion exchange method using Mg_0.67Al_0.33(OH)₂(CO₃)_0.165·0.58H₂O as a precursor. The sample thereby obtained was characterized by XRD, FTIR and UV-Vis spectroscopies and TG-DTA. The results show that the original interlayer carbonate anions of the hydrotalcite precursor can be completely replaced by methyl orange anions. The structure of the methyl orange anion-pillared hydrotalcite was investigated. It was found that the interaction of the host layers and the guests is through electrostatic attraction, hydrogen bonding and other weak chemical bonding interactions, confirming that the intercalated hydrotalcite has a supramolecular structure. The light and thermal stability of methyl orange anion-pillared hydrotalcite was enhanced to a considerable extent, comparing with that of methyl orange.

Key words: Hydrotalcite, Methyl orange, Intercalation assembly, Supramolecular structure, Light stability, Thermal stability

CLC Number:

TrendMD:

ZHANG Wei-Feng, LI Dian-Qing, SUN Meng, Evans D. G., DUAN Xue . Supramolecular Assembly of Methyl Orange-pillared Hydrotalcite and Its Light and Thermal Stability[J]. Chem. J. Chinese Universities, 2004, 25(10): 1799.

References

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