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

被引：23

作者：

Kulyk, Kostiantyn ^{[2
]}

Ishchenko, Valentyna ^{[3
]}

Palyanytsya, Borys ^{[1
]}

Khylya, Volodymyr ^{[3
]}

Borysenko, Mykola ^{[2
]}

Kulyk, Tetiana ^{[1
]}

机构：

[1] Natl Acad Sci Ukraine, Dept Amourphousand Structurally Ordered Oxides, Chuiko Inst Surface Chem, UA-03164 Kiev, Ukraine

[2] Natl Acad Sci Ukraine, Dept Oxide Nanocomposites, Chuiko Inst Surface Chem, UA-03164 Kiev, Ukraine

[3] Taros Shevchenko Kyiv Natl Univ, Dept Organ Chem, UA-01033 Kiev, Ukraine

来源：

JOURNAL OF MASS SPECTROMETRY | 2010年 / 45卷 / 07期

关键词：

TPD-MS; coumarins; fumed silica; nanosized oxides; kinetic parameters; TEMPERATURE-PROGRAMMED-DESORPTION; HETEROGENEOUS SOLID-SURFACES; STATISTICAL RATE THEORY; MASS-SPECTROMETRY; ADSORPTION; PARAMETERS; KINETICS; ACID;

D O I：

10.1002/jms.1765

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

The interactions between coumarins and the surface of fumed SiO2, CeO2/SiO2, TiO2/SiO2 and Al2O3/SiO2 were assessed by means of temperature-programed 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 (E sigma) of the coumarin substituents and the activation energy of CO2 formation was obtained. Copyright (C) 2010 John Wiley & Sons, Ltd.

引用

页码：750 / 761

页数：12

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