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Issue 14, 2014
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Intercalated supramolecular compounds of kaolinite with ethanolamine and ethylene glycol: structures and dielectric properties

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Abstract

Kaolinite (K), a polar and layered aluminosilicate mineral, was used as the host; ethanolamine (EOA) and ethylene glycol (EG) were inserted into the kaolinite interlayer to give the intercalated supramolecular compounds kaolinite–ethanolamine (K-EOA) and kaolinite–ethylene glycol (K-EG), respectively. The intercalation of EOA and EG resulted in an increase in the d(001)-value by 3.4 and 3.68 Å, which corresponds to expansion of the interlayer space by 156.7 Å3 in K-EOA and 169.6 Å3 in K-EG, respectively. The characteristic infrared-active ν(O–H) modes ν1, ν2 and ν3 besides ν5, which were quite sensitive to the host–guest interaction, were not significantly affected by intercalation in K-EOA and K-EG, and two intercalated compounds showed lower deintercalation temperature (115 and 109 °C for K-EOA and K-EG, respectively). These are due to weakly intermolecular interactions between the intercalant molecules and the kaolinite framework, which is in agreement with the theoretical analysis of crystal structures of the intercalated compounds. K-EOA and K-EG showed novel dielectric relaxation behavior, which originates from the dynamic orientation motion of intercalant molecules.

Graphical abstract: Intercalated supramolecular compounds of kaolinite with ethanolamine and ethylene glycol: structures and dielectric properties

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Publication details

The article was received on 17 Oct 2013, accepted on 16 Jan 2014 and first published on 22 Jan 2014


Article type: Paper
DOI: 10.1039/C3DT52930D
Citation: Dalton Trans., 2014,43, 5427-5434

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    Intercalated supramolecular compounds of kaolinite with ethanolamine and ethylene glycol: structures and dielectric properties

    Q. Qiao, H. Yang, J. Liu, S. Zhao and X. Ren, Dalton Trans., 2014, 43, 5427
    DOI: 10.1039/C3DT52930D

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