Thermal decomposition of SO4 2−-intercalated Mg–Al layered double hydroxide

Kameda, Tomohito; Fubasami, Yuki; Yoshioka, Toshiaki

doi:10.1007/s10973-011-1843-8

Cited by 16 publications

(2 citation statements)

References 15 publications

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“…There are only a few possible units that could be lost from the sample as it undergoes decomposition; these include water, carbon dioxide, hydroxyl units, and oxygen [17]. According to literature [17,[38][39][40][41][42][43], it is possible to propose the mechanism of the thermal Fig. 7, five mass losses were observed during the decomposition of MgAl-LDH.…”

Section: Thermal Propertiesmentioning

confidence: 99%

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Intercalation of amino acid containing chiral dicarboxylic acid between Mg–Al layered double hydroxide

Mallakpour

Dinari

2014

J Therm Anal Calorim

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Layered double hydroxide (LDH) is a class of ionic lamellar solids with positively charged layers with two types of metallic cations and exchangeable hydrated gallery anions. The intercalation of organic anions, namely N,N 0 -(pyromellitoyl)-bis-L-a-amino acids diacid, into MgAl LDHs was studied for the first time. Chiral diacid monomers were synthesized in high yield from the reaction between pyromellitic dianhydride and different natural amino acids (L-isoleucine, S-valine, L-leucine, and L-phenylalanine) in refluxed acetic acid. The anion exchange appeared to be the most effective method; all examined organic anions were intercalated successfully by this way in Mg-Al host structures. The structures of supramolecular chiral materials were characterized using Fourier transform infrared spectroscopy, thermogravimetry analysis, X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy techniques. Thermogravimetry analysis results showed that there were five mass loss steps during the thermal decomposition of the hybrid materials. These optically active pillars create a chiral environment and they could be used in chiral field.

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Section: Thermal Propertiesmentioning

confidence: 99%

“…According to the literature [17,[38][39][40][41][42][43], the mass loss around 295°C may correspond to the Al-OH dehydroxylation while the Mg-OH dehydroxylation and decarbonation occurs simultaneously at 410°C [17]. Dehydroxylation and decarbonation may be described by the following reactions: [17]: …”

Section: Thermal Propertiesmentioning

confidence: 99%