Spectra and Decay Kinetics of Diadamantyl-Dioxetane Chemiluminescence

AbstractThe thermal decomposition of 1,2-diadamantyldioxetane was studied by kinetic and spectroscopic methods. Spectra of the chemiluminescence emitted during the thermally induced decomposition of 1,2-diadamantyldioxetane, tetramethyldioxetane and trimethyldioxetane were obtained and the influence of quenchers and radical-scavengers, and the presence of "heavy atoms" in the surrounding of the emitting species was investigated. The kinetics of the decay mechanism was followed by measuring the time dependence of the chemiluminescence. The influence of radical-scavengers, quenchers and "external heavy atoms" on the kinetics was assessed. Experimental results were discussed in terms of a biradical decay mechanism.

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Thermally Induced Dehydration Reactions of Monosodium L-Glutamate Monohydrate: Dehydration of Solids Accompanied by Liquefaction

Physical Chemistry Chemical Physics ◽

10.1039/d1cp04734e ◽

2021 ◽

Author(s):

Takahiro Okazaki ◽

Masami Hara ◽

Nikita V. Muravyev ◽

Nobuyoshi Koga

Keyword(s):

Thermal Decomposition ◽

Thermal Dehydration ◽

Thermally Induced ◽

Dehydration Reactions ◽

Kinetics Of

In this study, we investigated the mechanistic features and kinetics of the thermal decomposition of solids accompanied by liquefaction as exemplified by the thermal dehydration reactions of monosodium L-glutamate monohydrate...

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Trapping Recombination Process and Persistent Photoconductivity in Semi-Insulating 4H SiC

Materials Science Forum ◽

10.4028/www.scientific.net/msf.527-529.563 ◽

2006 ◽

Vol 527-529 ◽

pp. 563-566 ◽

Cited By ~ 2

Author(s):

Ekaterina N. Kalabukhova ◽

S.N. Lukin ◽

D.V. Savchenko ◽

A.A. Sitnikov ◽

W.C. Mitchel ◽

...

Keyword(s):

Charge Transfer ◽

Transfer Process ◽

Deep Trap ◽

Persistent Photoconductivity ◽

Charge Transfer Process ◽

Decay Kinetics ◽

Thermally Induced ◽

Thermally Activated ◽

Before And After ◽

Kinetics Of

The decay kinetics of a persistent photoconductivity (PPC) in undoped semi-insulating 4H SiC and intercenter charge transfer were studied with EPR, photo-EPR and optical admittance spectroscopy (OAS). A thermally activated charge transfer process that occurs in the dark has been observed. The PPC effect was observed directly in changes in the quality factor of the EPR cavity before and after illumination and by the decay of the OAS signal for deep levels, and indirectly by the excitation and decay of the nitrogen and boron EPR lines that were not observed in the dark before illumination. The decay kinetics of the PPC and photo-induced carrier capture by nitrogen and boron levels were found to follow a stretched exponential form. The PPC in the temperature range from 77 to 300K was found to be produced by a thermally induced charge transfer process involving deep trap levels.

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Kinetics of Thermal Decomposition of Lime Stone

Tetsu-to-Hagane ◽

10.2355/tetsutohagane1955.53.7_740 ◽

1967 ◽

Vol 53 (7) ◽

pp. 740-743 ◽

Cited By ~ 1

Author(s):

Kiyoshi SAWAMURA ◽

Kazuichi MIZOGUCHI ◽

Tetsuro HANADA ◽

Kunihiko MAKINO

Keyword(s):

Thermal Decomposition ◽

Kinetics Of Thermal Decomposition ◽

Kinetics Of ◽

Lime Stone

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Thermal Decomposition Kinetics of Torrefied Oil Palm Empty Fruit Bunch Briquettes

Chemistry & Chemical Technology ◽

10.23939/chcht10.03.325 ◽

2016 ◽

Vol 10 (3) ◽

pp. 325-328 ◽

Cited By ~ 1

Author(s):

Bemgba Nyakuma ◽

◽

Arshad Ahmad ◽

Anwar Johari ◽

Tuan Abdullah ◽

...

Keyword(s):

Thermal Decomposition ◽

Oil Palm ◽

Decomposition Kinetics ◽

Thermal Decomposition Kinetics ◽

Kinetic Properties ◽

Tg Analysis ◽

Empty Fruit Bunches ◽

Thermal Lag ◽

Profile Characteristics ◽

Kinetics Of

The study is aimed at investigating the thermal behavior and decomposition kinetics of torrefied oil palm empty fruit bunches (OPEFB) briquettes using a thermogravimetric (TG) analysis and the Coats-Redfern model. The results revealed that thermal decomposition kinetics of OPEFB and torrefied OPEFB briquettes is significantly influenced by the severity of torrefaction temperature. Furthermore, the temperature profile characteristics; Tonset, Tpeak, and Tend increased consistently due to the thermal lag observed during TG analysis. In addition, the torrefied OPEFB briquettes were observed to possess superior thermal and kinetic properties over the untorrefied OPEFB briquettes. It can be inferred that torrefaction improves the fuel properties of pelletized OPEFB for potential utilization in bioenergy conversion systems.

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Thermal Decomposition Kinetics of Glyphosate (GP) and its Metabolite Aminomethylphosphonic Acid (AMPA)

10.26434/chemrxiv.9860753.v1 ◽

2019 ◽

Author(s):

Milad Narimani ◽

Gabriel da Silva

Keyword(s):

Thermal Decomposition ◽

Reaction Rate ◽

Decomposition Kinetics ◽

Rate Theory ◽

Thermal Decomposition Mechanism ◽

Treatment Processes ◽

Aminomethylphosphonic Acid ◽

Reaction Rate Theory ◽

Decomposition Chemistry ◽

Kinetics Of

Glyphosate (GP) is a widely used herbicide worldwide, yet accumulation of GP and its main byproduct, aminomethylphosphonic acid (AMPA), in soil and water has raised concerns about its potential effects to human health. Thermal treatment processes are one option for decontaminating material containing GP and AMPA, yet the thermal decomposition chemistry of these compounds remains poorly understood. Here, we have revealed the thermal decomposition mechanism of GP and AMPA by applying computational chemistry and reaction rate theory methods. <br>

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Thermal Decomposition Kinetics of γ-AlOOH Nanocrystalline Prepared by Hydrothermal Method

Journal of Inorganic Materials ◽

10.3724/sp.j.1077.2010.00096 ◽

2009 ◽

Vol 25 (1) ◽

pp. 96-100

Author(s):

Qi YANG ◽

Wen-Bin HU

Keyword(s):

Thermal Decomposition ◽

Hydrothermal Method ◽

Decomposition Kinetics ◽

Thermal Decomposition Kinetics ◽

Kinetics Of

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The kinetics of the thermal decomposition of gaseous ethylene oxide.

10.22215/etd/1964-12316 ◽

1964 ◽

Author(s):

Oliver Bernardini

Keyword(s):

Thermal Decomposition ◽

Ethylene Oxide ◽

Kinetics Of

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The Reactivity of Different Active Forms of Sodium Carbonate with Respect to Sulfur Dioxide

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19922302 ◽

1992 ◽

Vol 57 (11) ◽

pp. 2302-2308

Author(s):

Karel Mocek ◽

Erich Lippert ◽

Emerich Erdös

Keyword(s):

Thermal Decomposition ◽

Liquid Phase ◽

Sulfur Dioxide ◽

Specific Surface ◽

Surface Area ◽

Sodium Carbonate ◽

Room Temperature ◽

Active Form ◽

The Other ◽

Kinetics Of

The kinetics of the reaction of solid sodium carbonate with sulfur dioxide depends on the microstructure of the solid, which in turn is affected by the way and conditions of its preparation. The active form, analogous to that obtained by thermal decomposition of NaHCO3, emerges from the dehydration of Na2CO3 . 10 H2O in a vacuum or its weathering in air at room temperature. The two active forms are porous and have approximately the same specific surface area. Partial hydration of the active Na2CO3 in air at room temperature followed by thermal dehydration does not bring about a significant decrease in reactivity. On the other hand, if the preparation of anhydrous Na2CO3 involves, partly or completely, the liquid phase, the reactivity of the product is substantially lower.

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