NEW JOURNAL OF CHEMISTRY
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2024
·Vol. 48
·期 38
·16776-16794
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IF 2.7
Jianwei Zhang,Chengming Bian,Ling Chen,Weidong He
Recently, we investigated the interaction mechanism of 1H-tetrazole (1H-TZ) and nitrocellulose (NC). Next, we tried to introduce an amino group at the C and N atoms of 1H-tetrazole, so as to explore the influence of amino group modification on the pyrolysis process of NC. The focus of this study was on investigating the interaction mechanism of aminotetrazole (5-ATZ or DATZ) and NC through kinetics methods and TG-DSC-FTIR analysis. The quenching and reheating experiments revealed that the imino form of 5-ATZ or DATZ played an important role in this process. The addition of aminotetrazole (5-ATZ and DATZ) mainly affected the autocatalytic reaction at the initial stage of the pyrolysis process of NC. TG-DSC-FTIR experiments revealed that there was a chemical reaction between NO2 and decomposition products of 5-ATZ or DATZ. In this reaction, R–NCNH or NC–NH–R (R = H and NH2) reacted with NO2 to form N2O and CO2.
研究领域:
化学动力学
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材料科学
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热分析
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2022
·
IF 6.437
Jianwei Zhang,Ling Chen,Liangyou Zhao,Guorui Jin,Weidong He
Nitrogen heterocycles as Nitrogen-rich energetic material has been widely popularized due to their desirable properties like low sensitivities, excellent stability, and lower environmental impact, less erosive and less toxic combustion gases , especially in gun propellant application areas. The focus of this study is on investigating interaction mechanism of 1 H-tetrazole (1 H-TZ) and nitrocellulose (NC) by kinetics methods and TG-DSC-FTIR analysis. The mixture (NC-TZ) between 1 H-TZ and NC was prepared by means of physical blending. DSC experiments indicated that the open and closed environment can generate different and important influence on the chemical reaction between 1 H-TZ and NC. Combined with the change of activation energy , it illustrated that the gas 2 H-tetrazole, the isomer of 1 H-TZ, had a significant influence on the thermal decomposition of NC. In comparison with kinetic models of NC and NC-TZ, it can be found that the addition of 1 H-TZ mainly affected the contribution factor and m value in the first stage. The value of m decreased from 1.00 to 0.15, meanwhile, the contribution factor was decreased from 0.50 to 0.12. It showed that NO 2 , the initial decomposition product of NC, had taken part in the thermal decomposition process of 1 H-TZ. TG-DSC-FTIR experiments indicated that there was a chemical reaction between 2 H-tetrazole and the initial decomposition product of NC, NO 2 , to form CO, N 2 O and HN 3 .
研究领域:
化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
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2020
·
IF 1.41
Huang-Fei Qin,You Li,Xing-Mei Qin,Hai-Ye Li,He-Dong Bian,Qing Yu,Fu-Ping Huang
A new complex formulated as [Mn(H2O)6][Mn2(ett)6]·0.5H2O (1) has been synthesized from 5-(ethylthio)-1H-tetrazole) (Hett) andMn(OAc)2·4H2O. The crystal structure is composed of one [Mn(H2O)6] 2+ cation and an [Mn2(ett)6] 2– anionic chain. Two Mn(II) ions are bridged by μ2-ett – ligands to give [Mn2(ett)6] 2– anionic chains, which is balanced by cationic part of [Mn(H2O)6] 2+ in charge. The hydrogen bonds between anionic/cationic units play an important role in the formation of three-dimensional (3-D) supramolecular structure of 1. Magnetic measurements of 1 exhibit an interesting spin canting behavior and long-range magnetic ordering.
研究领域:
材料科学
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磁性材料
✓ 已验证
产品关联
DOI
高影响因子
TETRAHEDRON LETTERS
·
2018
·Vol. 60
·期 5
·402-406
·
IF 2.125
Xingquan Xiong,Chao Yi,Xu Liao,Shilin Lai
A series of 5-substituted-1 H -tetrazoles have been efficiently synthesized in moderate to excellent yields (68–90%) under mild reaction conditions by combining aryl aldehydes, hydroxylamine hydrochloride with sodium azide in the presence of catalytic amount of Cu(OAc) 2 in deep eutectic solvent (DES). The new synthetic method has many advantages, such as high conversion, green reaction medium, easy work-up, low cost, and environment friendly.
研究领域:
有机化学
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药物化学
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绿色化学
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合成方法学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2023
·
IF 4.3
Guona Li,Qingya Yang,Xiaoying Liu,Lvcheng Liu,Junshan Han,Xing Li
A very poisonous heavy metal Cd 2+ not only contaminates the living environment but also constitutes a serious menace to human health through water intake and food chains. Thus, monitoring and controlling the content of Cd 2+ with rapidity, sensitivity, and simplicity in tap water, soil, and rice samples is important especially. In the work, a high-efficiency sensor based on gold nanoparticles (AuNPs) embellished and refined with 3-(1H-Tetrazol-5-yl) aniline (TAA) for the colorimetric detection of Cd 2+ is rationally put forward. The interaction between Cd 2+ and TAA@AuNPs leads to the agglomeration of the AuNPs solutions, resulting in the color of the system changing from wine-red to gray-blue. The limit of detection (LOD) of the sensor is 1.0 μM when observe with the unaided eye, and UV–vis spectroscopy also has a LOD of 31 nM with an excellent linear relationship ( R 2 = 0.99049) in the concentration range of 0.0–8.0 μM for Cd 2+ , indicating that AuNPs modified with TAA can be effectively used for the quantitative determination of Cd 2+ . Furthermore, the colorimetric sensor has been tested on tap water, soil, and rice samples, and it shows promising potential for the practical monitoring of harmful Cd 2+ in environmental systems.
研究领域:
环境科学
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分析化学
✓ 已验证
DOI
高影响因子
Crystals
·
2022
·Vol. 12
·期 7
·948
·
IF 2.67
Haolong Zhai,Xiaoping Cui,Yuping Gan
Taking the combustion tear gas mixture as the research object, the system formula was optimized by adding a different mass fraction of 5-amino-1H-tetrazole(5AT). TG-DSC, a thermocouple, and a laser smoke test system were used to characterize the characteristic combustion parameters such as combustion temperature and velocity, as well as the end-point effects such as smoke concentration and particle size. Starink’s method, the Flynn–Wall–Ozawa method, and the Coats–Redfern method were used to evaluate the pyrolysis kinetic parameters of the samples. The results show that when the mass fraction of 5-amino-1H-tetrazole in the system is 10%, the maximum combustion temperature of the sample decreases by nearly 70 °C and the smoke concentration increases by 12.81%. The kinetic study also found that with a different mass fraction of 5-amino-1H-tetrazole in the system, the main reaction model of the mixed agent in the first, third, and fourth stages of pyrolysis changed significantly, but for the second stage of sample pyrolysis, the main reaction model (the A4 model) showed a high degree of consistency, which can be considered as the thermal diffusion stage of the tear agent capsicum oleoresin (OC) (the temperature range is 220~350 °C), which is highly consistent with the results of the TG-DSC analysis. It was also confirmed that OC’s thermal diffusion is mainly concentrated in this stage. The results of this study show that adding an appropriate amount of the combustible agent 5-amino-1H-tetrazole to the combustion tear gas mixture can improve its combustion performance and smoking performance, which provides an important, new idea for the development of a new generation of safe, efficient, and environmentally friendly tear gas mixtures.Keywords:5-amino-1H-tetrazole;tear gas mixture;combustible agent;combustion pyrolysis characteristics;dynamics research
研究领域:
化学
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材料科学
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热分析
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Feifei Huang,Xiuquan Yao,Xiaofang Luo
This work explores the use of a common molecule on pharmaceuticals, 1-Ethyl-5-Mercapto Tetrazole (EMTT), to protect copper in 0.5M H 2 SO 4 solution. The addition of EMTT in sulfuric acid solution was verified to be protective of copper by testing electrochemistry, with a maximum inhibition efficiency of 88.30% at 200 mg/L. The electrochemical results were supported by the results of the surface morphology of copper specimen immersed. Finally, quantum chemical calculations were carried out to explain the retarding effect mechanistically.
研究领域:
腐蚀科学
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电化学
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材料科学
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表面化学
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量子化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）