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7601-90-3Relevant articles and documents
Effect of rGO-Fe2O3 nanocomposites fabricated in different solvents on the thermal decomposition properties of ammonium perchlorate
Zhang, Ming,Zhao, Fengqi,Yang, Yanjing,Zhang, Jiankan,Li, Na,Gao, Hongxu
, p. 7010 - 7019 (2018)
rGO-Fe2O3 composites were prepared using different solvents (distilled water, ethanol, N-methylpyrrolidone, ethyl acetate, n-butyl alcohol and N,N-dimethylformamide) via a simple solvothermal method and characterized by SEM, TEM, XRD
The effect of specific surface area of TiO2 on the thermal decomposition of ammonium perchlorate
Fujimura, Kaori,Miyake, Atsumi
, p. 27 - 31 (2010)
The thermal decomposition of ammonium perchlorate (AP) is considered to be the first step in the combustion of AP-based composite propellants. In this report, the effect of the specific surface area of titanium oxide (TiO 2) catalysts on the thermal decomposition characteristics of AP was examined with a series of thermal analysis experiments. It was clear that the thermal decomposition temperature of AP decreased when the specific surface area of TiO2 increased. It was also possible that TiO2 influences the frequency factor of AP decomposition because there was no observable effect on the activation energy. Akademiai Kiado, Budapest, Hungary 2009.
Supercritical solvothermal synthesis and formation mechanism of V2O3 microspheres with excellent catalytic activity on the thermal decomposition of ammonium perchlorate
Yang, Liuqing,Li, Xiaofang,Zhang, Xiongzhi,Huang, Chi
, p. 1394 - 1402 (2019)
V2O3 with the structure of microspheres has been successfully synthesized by a facile supercritical solvothermal method. The samples have a rhombohedral structure and the morphology of microspheres. The formation mechanism is proposed on the basis of the discussion on the self-assembly process of uniform microsphere structure. Furthermore, the catalytic activity of as-obtained V2O3 microspheres was investigated through the thermal decomposition of ammonium perchlorate (AP). The thermal decomposition temperature was reduced by 46 °C in the presence of 2 wt% of V2O3 microspheres, indicating that V2O3 with microspheres structure has excellent catalytic property. In addition, the possible catalytic mechanism of the microspheres for the thermal decomposition of AP is simply discussed. This study provides a simple way to control the morphology of V2O3 nanostructure, which also exhibits the potential application in modern science and technology.
Synthesis and characterization of N-(arylmethylene)-benzimidazole/imidazole-borane compounds
Lin, Cai-Xia,Liu, Wei-Ming,Yan, Jian-Feng,Yuan, Yao-Feng,Zhang, Min
, (2020/10/07)
N-(arylmethylene)-benzimidazole/imidazole-borane compounds (7-10) based on ferrocene/benzene were synthesized in a cost-effective way by reacting N-(arylmethylene)-benzimidazole/imidazoles with ammonium sulfate ((NH4)2SO4) and sodium borohydride (NaBH4). The structures of compounds 7-9 were determined by X-ray crystallography. Four compounds displayed high thermal decomposition temperatures (182-256°C) according to the thermogravimetry (TG) measurements. Interestingly, these compounds showed promising applications as potential propellant due to their spontaneous combustion upon contact concentrated HNO3 (≥ 95 %) and catalytic effect on the thermal degradation of ammonium perchlorate (AP).
Facile fabrication of porous La doped ZnO granular nanocrystallites and their catalytic evaluation towards thermal decomposition of ammonium perchlorate
Jagtap,Kshirsagar,Khire,Pardeshi
, p. 194 - 204 (2019/05/17)
The present article expresses synthesis, characterization and catalytic activity of pure and La doped ZnO (La-ZnO)towards thermal decomposition of Ammonium Perchlorate (AP). The catalytic materials (La-ZnO)with 0–1.00% of doped La were synthesized by simple co-precipitation method and thoroughly characterized by several spectroscopic techniques like FT-IR, XRD, UV–Visible, PL, SEM-EDS and BET analysis. The XRD pattern of synthesized materials displayed wurtzite ZnO structure. The SEM images of the materials showed granular morphology where gradual increase in particle size and crystallite size was observed to be increased with increase in doped La concentration. The BET surface area of the materials was 28.203 to 15.830 m2/g and exhibited mesoporous nature. In catalytic studies for thermal decomposition of AP, the pure ZnO catalyst offered single stage decomposition of AP along with lowering high-thermal decomposition (HTD)temperature of AP by 105 OC. However, La doped ZnO showed slightly lower activity due to promotion of NO formation in oxidation of ammonia generated on initial decomposition of AP and decrease in BET surface area.
Thermal decomposition of ammonium perchlorate based mixture with fullerenes
Han,Sun,Wang,Lin,Li,Zhao,Liu,Yi,Ren
, p. 551 - 557 (2008/10/09)
The effects of fullerenes, including fellerene soot (FS), extracted fullerene soot (EFS) and pure C60 on the thermal decomposition of ammonium perchlorate (AP) compared with traditional carbon black (CB) catalyst has been studied by employing t
6-Nitro-2-benzothiazolyl α-Glucoside and α-Mannoside in β-Selective Glycosylations
Hashihayata, Takashi,Mandai, Hiroki,Mukaiyama, Teruaki
, p. 169 - 178 (2007/10/03)
Highly β-selective glucosylations of glycosyl acceptors having α primary hydroxy group with a 6-nitro-2-benzothia-zolyl α-glucoside donor 3α proceeded smoothly in the presence of a catalytic amount of trifluoromethanesulfonic acid (TfOH) in CH 2Cl2 at -78 °C to afford the corresponding glycosides in high yields. With the use of 3α, β-saccharides could be obtained more dominantly than other α-glucosyl donors such as thioform- and trichloroacet-imidates or fluoride in the glucosylation under the same conditions. Similarly, highly β-selective mannosylations of glycosyl acceptors with a 6-nitro-2-benzothiazolyl α-mannoside donor 18α were carried out smoothly in the presence of a catalytic amount of tetrakis(pentafluorophenyl)boric acid H[B(C6F5) 4] to afford the corresponding disaccharides in good to high yields; 18α apparently behaved as a potent donor here for the construction of β-mannoside linkage. Interestingly, in situ anomerization from 18β to 18α was observed when β-mannosyl donor 18β was treated with a catalytic amount of H[B(C6F5)4] in CH 2Cl2.
Catalytic and stereoselective glycosylation with a novel and efficient disarmed glycosyl donor: Glycosyl p-trifluoromethylbenzylthio-p-trifluoromethylphenyl formimidate
Mukaiyama, Teruaki,Chiba, Hiroyuki,Funasaka, Setsuo
, p. 392 - 393 (2007/10/03)
A novel and efficient glycosyl donor having a p-trifluoromethylbenzylthio-p-trifluoromethylphenyl formimidate function as a leaving group is easily prepared by the addition of anomeric hydroxyl group of 2,3,4,6-tetra-O-benzoyl-α,β-D-glucopyranose to p-trifluoromethylphenyl isothiocyanate, followed by treatment with p-trifluoromethylbenzyl bromide. Catalytic and stereoselecrive glycosylation using this glycosyl donor effectively proceeds by activating its nitorogen atom with various protic and Lewis acids.
Properties of dichlorine hexaoxide in the gas phase and in low-temperature matrices
Jansen, Martin,Schatte, Gabriele,Tobias, Klaus M.,Willner, Helge
, p. 1703 - 1706 (2008/10/08)
The IR spectrum of matrix-isqlated dichlorine hexaoxide shows that there are two inequivalent chlorine atoms in the molecule and that it is best described as the mixed anhydride of chloric and perchloric acids. Of 18 fundamental vibrations, 16 were observed and many of them were assigned. O3ClOClO2 exhibits a broad UV absorption at 268 nm (εmax = 3000 dm3 mol-1 cm-1) in the gas phase. It is decomposed on photolysis in an Ar matrix to ClOClO3 and O2. The kinetics of formation and decomposition of O3ClOClO2 in the gas phase were also investigated. The rate of formation depends strongly on the concentration of ClO2 and O3. Cl2O6 does not dissociate into ClO3 radicals, and the primary stable decomposition products are ClO2, ClOClO3, and O2.