Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 75: Issue 2
Thermal behaviour of intercalated 8-hydroxyquinoline (oxine) in montmorillonite clay
Authors:
I. Pastre Universidade Estadual Paulista Instituto de Biocięncias Letras e Cięncias Exatas Săo Paulo CEP 15054-000 Brazil Săo Paulo CEP 15054-000 Brazil

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I. do Nascimento Oliveira Universidade Estadual Paulista Instituto de Biocięncias Letras e Cięncias Exatas Săo Paulo CEP 15054-000 Brazil Săo Paulo CEP 15054-000 Brazil

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A. Moitinho Universidade Estadual Paulista Instituto de Biocięncias Letras e Cięncias Exatas Săo Paulo CEP 15054-000 Brazil Săo Paulo CEP 15054-000 Brazil

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G. de Souza Universidade Estadual Paulista Instituto de Biocięncias Letras e Cięncias Exatas Săo Paulo CEP 15054-000 Brazil Săo Paulo CEP 15054-000 Brazil

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E. Ionashiro Universidade Estadual Paulista Instituto de Biocięncias Letras e Cięncias Exatas Săo Paulo CEP 15054-000 Brazil Săo Paulo CEP 15054-000 Brazil

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F. Fertonani Universidade Estadual Paulista Instituto de Biocięncias Letras e Cięncias Exatas Săo Paulo CEP 15054-000 Brazil Săo Paulo CEP 15054-000 Brazil

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Pages:
661–669
Online Publication Date:
02 Nov 2004
Publication Date:
01 Feb 2004
Article Category:
Research Article
DOI:
https://doi.org/10.1023/b:jtan.0000027160.19388.0c
Keywords:
DSC; montmorillonite; TG/DTG; oxine; X-ray diffraction
Restricted access

Abstract  

The composite montmorillonite-8-hydroxyquinoline (Swy-1-8-HQ) was prepared by two different processes and studied by using thermogravimetric analysis (TG/DTG and DSC), as well as helpful techniques as fluorescence in the UV-visible region and X-ray diffraction. The composites developed fluorescent appearance, however with quantum poor efficiency and they exhibited distinct TG and DSC thermal behavior. The fluorescence data of spectra associated to the TG/DT curves allowed to suggest that the 8-HQ was present in the composites in two different circumstances: 1 - intercalated in the interlayer spaces (Swy-1-8-HQ2), rigidly associated to the substrate feasible as a monolayer with the aromatic rings parallel to the silica layer; and/or, 2 - adsorbed on the surface (Swy-1-8-HQ1), either as a bilayer formation or tilting of the molecules to the silicate layer sheet. All results confirmed above are in agreement with X-ray diffraction patterns, once the interlayer space increases when 8-HQ is incorporated. The experimental results confirm the formation of the composites in agreement with the method used in the preparation.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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