Interlayer Surface Modification of Layered Perovskite HLaNb2O7·xH2O with Diol Compounds Possessing Ethylene Oxide Chains

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Grafting reactions between an n-decoxy derivative of ion-exchangeable layered perovskite HLaNb2O7·xH2O and polyethylene glycols (PEGs) with various molecular masses were investigated. X-ray diffraction analysis showed that a reflection corresponding to the interlayer distance of the n-decoxy derivative of HLaNb2O7·xH2O (2.73 nm) disappeared and that new diffraction lines ascribable to smaller interlayer distances, which increased with increases in the molecular mass of PEGs, appeared. The solid-state 13C CP/MAS NMR spectra of the products indicated that ethylene oxide chains were covalently bound to the interlayer surface of HLaNb2O7xH2O. The signal assignable the carbons bound to OH groups suggests that the grafting reactions for the formation of Nb-O-C bonds typically involve one of the terminal OH groups in PEGs.

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Edited by:

Takashi Goto, Zhengyi Fu and Lianmeng Zhang

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82-86

Citation:

S. Hotta et al., "Interlayer Surface Modification of Layered Perovskite HLaNb2O7·xH2O with Diol Compounds Possessing Ethylene Oxide Chains", Key Engineering Materials, Vol. 616, pp. 82-86, 2014

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June 2014

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