+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

A TPD-MS study of the interaction of coumarins and their heterocyclic derivatives with a surface of fumed silica and nanosized oxides CeO2/SiO2, TiO2/SiO2, Al2O3/SiO2



A TPD-MS study of the interaction of coumarins and their heterocyclic derivatives with a surface of fumed silica and nanosized oxides CeO2/SiO2, TiO2/SiO2, Al2O3/SiO2



Journal of Mass Spectrometry 45(7): 750-761



The interactions between coumarins and the surface of fumed SiO(2), CeO(2)/SiO(2), TiO(2)/SiO(2) and Al(2)O(3)/SiO(2) were assessed by means of temperature-programmed desorption mass spectrometry. The different stages of the thermolysis of coumarin were identified and an analysis of the underlying reactions was performed. The kinetic parameters of the involved reactions were thus obtained. The decomposition of thiazolyl-substituted coumarins was found to proceed through a 'thiazole-thiazine' ring expansion in the adsorbed state. A linear correlation between the sigma constants (Sigma sigma) of the coumarin substituents and the activation energy of CO(2) formation was obtained.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 051077334

Download citation: RISBibTeXText

PMID: 20533505

DOI: 10.1002/jms.1765


Related references

Synthesis of Copper-Based Nanostructured Catalysts on SiO2-Al2O3, SiO2-TiO2, and SiO2-ZrO2 Supports for NO Reduction. Journal of Nanoscience and Nanotechnology 15(7): 5410-5417, 2015

Methyl orange adsorption by microporous and mesoporous TiO2-SiO2 and TiO2-SiO2-Al2O3 composite xerogels. Composite Interfaces 11(2): 205-212, 2004

Multilayered Al2O3/SiO2 and TiO2/SiO2 coatings for glazed colored solar thermal collectors. Solar Energy Materials and Solar Cells 89(2-3): 209-218, 2005

Ru dye functionalized Au-SiO2@TiO2 and Au/Pt-SiO2@TiO2 nanoassemblies for surface-plasmon-induced visible light photocatalysis. Journal of Colloid and Interface Science 421: 114-121, 2014

XPS study of the supported phase SiO2 interaction in Mo/SiO2 and CoMo/SiO2 hydrodesulphurization catalysts in their oxidic precursor form. Journal of Electron Spectroscopy and Related Phenomena 17(2): 121-135, 1979

Molecular composition and orientation of interstitial versus surface silicon oxides for Si(111)/SiO2 and Si(100)/SiO2 interfaces using FT-IR and X-ray photoelectron spectroscopies. Applied Spectroscopy 57(6): 628-635, 2003

Interaction between fluorine and silica in quenched melts on the joins SiO2-AlF3and SiO2-NaF determined by raman spectroscopy. Physics and Chemistry of Minerals 12(2): 77-85, 1985

Promotion effects of SiO2 or/and Al2O3 doped CeO2/TiO2 catalysts for selective catalytic reduction of NO by NH3. Journal of Hazardous Materials 278: 350-359, 2014

Discussion on the double oxides formation in the systems of ZrO2-SiO2, ZrO2-TiO2and TiO2-SiO2. Journal of Materials Science Letters 9(7): 765-767, 1990

Garnet and spinel lherzolite assemblages in MgO–Al2O3–SiO2 and CaO–MgO–Al2O3–SiO2 thermodynamic models and an experimental conflict. Journal of Metamorphic Geology 30(6), 2012

The effect of SiO₂/Al₂O₃ ratio on the structure and microstructure of the glazes from SiO₂-Al₂O₃-CaO-MgO-Na₂O-K₂O system. Spectrochimica Acta. Part A Molecular and Biomolecular Spectroscopy 134: 621-630, 2015

Synthesis of Nanoscale CaO-Al₂O₃-SiO₂-H₂O and Na₂O-Al₂O₃-SiO₂-H₂O Using the Hydrothermal Method and Their Characterization. Materials 10(7):, 2017

Trapping of BTX compounds by SiO2, Ag-SiO2, Cu-SiO2, and Fe-SiO2 porous substrates. Chemosphere 81(7): 876-883, 2010

Photoluminescence from (Si/SiO2)n superlattices and their use as emitters in [SiO2/Si]n SiO2 [Si/SiO2]m microcavities. Spectrochimica Acta. Part A Molecular and Biomolecular Spectroscopy 57(10): 2019-2028, 2001

Optical properties and structural evaluation of Li2O-Al2O3-SiO2-TiO2 glassy semiconductor containing passive agent CeO2. Spectrochimica Acta. Part A Molecular and Biomolecular Spectroscopy 83(1): 592-597, 2011