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High‐pressure Raman spectroscopic and other structural studies of hydrotalcites containing intercalated dicarboxylic acid anions
Author(s) -
Wright Josh,
Barsan Mirela M.,
Butler Ian S.,
Gilson Denis F. R.,
Adebajo Moses O.,
Frost Ray L.
Publication year - 2011
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.2881
Subject(s) - raman spectroscopy , adipate , chemistry , malonate , crystallography , solid state nuclear magnetic resonance , nuclear magnetic resonance , organic chemistry , polymer chemistry , physics , optics
The results of pressure‐tuning Raman spectroscopic, X‐ray powder diffraction and solid‐state 13 C‐NMR studies of selected dicarboxylate anions intercalated in a Mg–Al layered double hydroxide lattice are reported. The pressure dependences of the vibrational modes are linear for pressures up to 4.6 GPa, indicating that no phase transitions occur. The interlayer spacings show that the oxalate, malonate and succinate dianions are oriented perpendicular to the layers, but the glutarate and adipate are tilted. The solid‐state 13 C‐NMR spectra of these materials show full chemical shift anisotropy and, therefore, the anions are not mobile at room temperature. Copyright © 2011 John Wiley & Sons, Ltd.