ChemInform Abstract: STUDY OF THE THERMOLYSIS OF 5-METHYL-1-PHENYLTETRAZOLE BY A COMPLEX METHOD OF DTA, DIFFERENTIAL THERMOGRAVIMETRIC ANALYSIS AND MASS SPECTROMETRY

C/LiMnPO4 materials were synthesized by the complex polymerized method. An orthorhombic olivine type structure was obtained by calcination at temperatures over 973 K under an argon/hydrogen (5%) atmosphere. Differential thermogravimetric analysis showed that the carbon content of C/LiMnPO4 was about 65 wt%. The initial discharge capacity of C/LiMnPO4 calcined at 973 K was 135 mAh/g at 0.1 C and 60 mAh/g at 1 C.

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Synthesis, characterization, and structures of zircona- and boracyclosiloxanes with ferrocenyl substituents

Canadian Journal of Chemistry ◽

10.1139/v02-129 ◽

2002 ◽

Vol 80 (11) ◽

pp. 1469-1480 ◽

Cited By ~ 6

Author(s):

Karena Thieme ◽

Sara C Bourke ◽

Juan Zheng ◽

Mark J MacLachlan ◽

Fojan Zamanian ◽

...

Keyword(s):

Mass Spectrometry ◽

Differential Scanning Calorimetry ◽

Thermogravimetric Analysis ◽

Ring Opening ◽

Ring Opening Polymerization ◽

The Novel ◽

X Ray Diffraction ◽

Scanning Calorimetry ◽

X Ray ◽

Multinuclear Nmr Spectroscopy

The novel zirconatetraferrocenylcyclotrisiloxane Cp2Zr(OSiFc2)2O (6), dizirconatetraferrocenylcyclotetrasiloxane [Cp2Zr(OSiFc2)O]2 (7), boratetraferrocenylcyclotrisiloxane (C6H5)B(OSiFc2)2O (8), and diboratetraferrocenylcyclotetrasiloxane [(C6H5)B(OSiFc2)O]2 (9) with ferrocenyl (Fc = Fe(η-C5H4)(η-C5H5)) substituents at silicon have been prepared from the reactions of Cp2Zr(NMe2)2 and PhBCl2 with diferrocenylsilanediol Fc2Si(OH)2 (3) and tetraferrocenyldisiloxanediol [Fc2SiOH]2O (5). The compounds were characterized by mass spectrometry, elemental analysis, UVvis, IR, Raman, and multinuclear NMR spectroscopy, as well as single crystal X-ray diffraction. Thermogravimetric analysis and differential scanning calorimetry investigation of 69 showed that the cycles decompose before they can undergo any thermal ring-opening polymerization. In addition, no polymerization was detected in the presence of either KOSiMe3 or HOTf. The bulky ferrocenyl substituents on the Si atoms are likely to be at least partially responsible for the inability of these heterocycles to undergo ring-opening polymerization. Key words: heterocyclosiloxanes, ferrocenyl.

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Thermogravimetric analysis–mass spectrometry (TGA–MS) of hydromagnesite from Dujiali Lake in Tibet, China

Journal of Thermal Analysis and Calorimetry ◽

10.1007/s10973-018-7197-8 ◽

2018 ◽

Vol 133 (3) ◽

pp. 1429-1437 ◽

Cited By ~ 7

Author(s):

Yongjie Lin ◽

Mianping Zheng ◽

Chuanyong Ye ◽

Ian M. Power

Keyword(s):

Mass Spectrometry ◽

Thermogravimetric Analysis

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Thermal Transformation of Caffeic Acid on the Nanoceria Surface Studied by Temperature Programmed Desorption Mass-Spectrometry, Thermogravimetric Analysis and FT–IR Spectroscopy

Colloids and Interfaces ◽

10.3390/colloids3010034 ◽

2019 ◽

Vol 3 (1) ◽

pp. 34 ◽

Cited By ~ 3

Author(s):

Nataliia Nastasiienko ◽

Borys Palianytsia ◽

Mykola Kartel ◽

Mats Larsson ◽

Tetiana Kulik

Keyword(s):

Mass Spectrometry ◽

Thermogravimetric Analysis ◽

Cerium Dioxide ◽

Temperature Programmed Desorption ◽

Hydroxyl Groups ◽

Surface Complexes ◽

Desorption Mass Spectrometry ◽

Ft Ir ◽

Temperature Programmed ◽

Ft Ir Spectroscopy

The studies of pyrolysis of caffeic acid (CA) and its surface complexes is important for the development of technologies of heterogeneous catalytic pyrolysis of plant- and wood- based renewable biomass components. In this work, the structure and thermal transformations of the surface complexes of CA on the surface of nanoceria were investigated using Fourier transform–infrared (FT–IR) spectroscopy, thermogravimetric analysis (TGA) and temperature-programmed desorption mass spectrometry (TPD MS). It was found that CA on the surface of cerium dioxide forms several types of complexes: bidentate carboxylates, monodentate carboxylates and complexes formed as a result of interaction with phenolic hydroxyl groups. This is due to the ability of nanosized cerium dioxide to generate basic hydroxyl groups that can deprotonate phenolic groups to form phenolates on the surface. The main pyrolysis products were identified. The possible ways of forming 3,4-dihydroxyphenylethylene, acetylene carboxylic acid, pyrocatechol and phenol from surface complexes of CA were suggested. It was established that on the nanoceria surface effectively occur the decarboxylation, decarbonylation, and dehydration reactions of the CA, which are the desirable processes in biomass conversion technologies.

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Thermogravimetric analysis coupled with mass spectrometry of spent mushroom substrate and its fractions

Journal of Analytical and Applied Pyrolysis ◽

10.1016/j.jaap.2018.05.010 ◽

2018 ◽

Vol 133 ◽

pp. 1-8 ◽

Cited By ~ 5

Author(s):

Radoslaw Slezak ◽

Liliana Krzystek ◽

Stanislaw Ledakowicz

Keyword(s):

Mass Spectrometry ◽

Thermogravimetric Analysis ◽

Spent Mushroom Substrate

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Catalytic Pyrolysis of Polyethylene and Polypropylene over Desilicated Beta and Al-MSU-F

Catalysts ◽

10.3390/catal8110501 ◽

2018 ◽

Vol 8 (11) ◽

pp. 501 ◽

Cited By ~ 6

Author(s):

Hyung Lee ◽

Young-Kwon Park

Keyword(s):

Mass Spectrometry ◽

Gas Chromatography ◽

Thermogravimetric Analysis ◽

Pore Size ◽

Aromatic Hydrocarbons ◽

Catalytic Pyrolysis ◽

Gas Chromatography Mass Spectrometry ◽

Waste Plastics ◽

Mesoporous Catalysts ◽

Branched Hydrocarbons

The catalytic pyrolysis (CP) of different thermoplastics, polyethylene (PE) and polypropylene (PP), over two types of mesoporous catalysts, desilicated Beta (DeBeta) and Al-MSU-F (AMF), was investigated by thermogravimetric analysis (TGA) and pyrolyzer-gas chromatography/mass spectrometry (Py-GC/MS). Catalytic TGA of PE and PP showed lower decomposition temperatures than non-catalytic TGA over both catalysts. Between the two catalysts, DeBeta decreased the decomposition temperatures of waste plastics further, because of its higher acidity and more appropriate pore size than AMF. The catalytic Py-GC/MS results showed that DeBeta produced a larger amount of aromatic hydrocarbons than AMF. In addition, CP over AMF produced a large amount of branched hydrocarbons.

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