title: Intercalated supramolecular compounds of kaolinite with ethanolamine and ethylene glycol: structures and dielectric properties.
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 Å(3) in K-EOA and 169.6 Å(3) 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.
authors: State Key Laboratory of Materials-Oriented Chemical Engineering and College of Science, Nanjing University of Technology, Nanjing 210009, P.R. China. xmren@njut.edu.cn.
authors: Qiao
authors: Q
authors: Qiao
authors: Hao
authors: H
authors: Yang
authors: Jian-Lan
authors: JL
authors: Liu
authors: Shun-Ping
authors: SP
authors: Zhao
authors: Xiao-Ming
authors: XM
authors: Ren