Thermal characterization of modified phyllosilicates with aromatic heterocyclic amines

Vermiculite with the general formula of [Si6.85Al1.15][Mg4.68Al0.51Fe0.63]O20(OH)4Ca0.128Na0.032K0.094 was made to react with heteroaromatic amines alpha-, beta- and gamma-picolines in aqueous solution. The products were characterized by elemental analysis, infrared spectroscopy, X-ray diffraction a...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2007-03, Vol.87 (3), p.767-770
Main Authors: MORAIS, C. C, DA SILVA FILHO, E. C, DA SILVA, Oberto G, DA FONSECA, Maria G, ARAKAKI, Luiza N. H, ESPINOLA, J. G. De P
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
Heterocyclic compounds
Heterocyclic compounds with only one n hetero atom and condensed derivatives
Organic chemistry
Preparations and properties
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Summary:Vermiculite with the general formula of [Si6.85Al1.15][Mg4.68Al0.51Fe0.63]O20(OH)4Ca0.128Na0.032K0.094 was made to react with heteroaromatic amines alpha-, beta- and gamma-picolines in aqueous solution. The products were characterized by elemental analysis, infrared spectroscopy, X-ray diffraction and thermogravimetry. The intercalated nanocompounds maintained the crystallinity which changed the original interlayer distance of 1422 to 1474, 1456 and 1474 pm, for the sequence of the guest picoline molecules. Thermogravimetry data suggested the intercalation reactions were governed by basicity of amines.
ISSN:1388-6150
1588-2926
1572-8943
DOI:10.1007/s10973-006-7854-1