JOURNAL OF BIOTECHNOLOGY
·
2015
·
IF 2.871
Nan-Wei Wan,Zhi-Qiang Liu,Feng Xue,Yu-Guo Zheng
A halohydrin dehalogenase (HHDH-PL) from Parvibaculum lavamentivorans DS-1 was characterized and applied to determine azide and cyanide in the water. In this methodology, HHDH-PL catalysed azide and cyanide to react with butylene oxide and form corresponding β-substituted alcohols 1-azidobutan-2-ol (ABO) and 3-hydroxypentanenitrile (HPN) that could be quantitatively detected by gas chromatograph. The detection calibration curves for azide ( R 2 = 0.997) and cyanide ( R 2 = 0.995) were linear and the lower limits of detection for azide and cyanide were 0.1 and 0.3 mM, respectively. Several other nucleophiles were identified having no effect on the analysis of azide and cyanide, excepting nitrite which influenced the detection of cyanide. This was the first report of a biological method to determine the inorganic azide and cyanide by converting them to the measurable organics.
研究领域:
生物化学
·
环境科学
✓ 已验证
DOI
高影响因子
SYNTHESIS-STUTTGART
·
2019
·Vol. 51
·期 23
·4425-4433
·
IF 2.867
Yong Jian,Ming Chen,Chao Yang,Wujiong Xia
A small molecule, namely nitroacenaphthene, is reported for the first time as a recyclable visible-light photocatalyst for the construction of the C=N bond from sulfonyl azides and amines. This scalable, site-selective protocol provides a convenient way to access various sulfonyl amidines under mild conditions. Two reaction pathways are proposed, according to different transformation patterns.
研究领域:
有机化学
·
光催化
✓ 已验证
DOI
高影响因子
Defence Technology
·
2022
·
IF 4.035
Shuang Wang,Li Yang,Zhenzhan Yan,Jimin Han,Xiaoting Ren,Wei Li
Due to its extremely low electrostatic sensitivity, copper azide primary explosive is greatly limited in practical applications. In this study, a composite film with Cu-MOF in-situ growth on carbon nanofilm was prepared by electrospinning and solvothermal methods, and CNF@Cu–N 3 film with electrostatic safety was obtained by carbonization and azide later. Its electrostatic sensitivity ( E 50 ) was greatly increased from 0.05 mJ of raw materials to 4.06 mJ, and still maintained a good detonation performance which could successfully detonate the CL-20 secondary explosive. This is mainly due to the synergistic effect of the carbon film and the MOF structure, which greatly improves the conductivity of the entire system and the uniform distribution of copper particles, providing a new preparation strategy for metal azide film that is suitable for the micro-initiator device.
研究领域:
材料科学
·
爆炸物工程
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2012
·Vol. 4
·期 5
·1396-1401
·
IF 5.321
Qiang Wang,Hongkun Li,Qiang Wei,Jing Zhi Sun,Jian Wang,Xiao A. Zhang,Anjun Qin,Ben Zhong Tang
The Cu(I)-catalyzed azide–alkyne click polymerization has become a powerful tool for the preparation of functional polytriazoles. However, copper residues in the products could harm the performance of optoelectronic devices and be cytotoxic in biological applications. The complete removal of these residues after reaction from the polymers is therefore necessary but difficult. The metal-free azide–alkyne click polymerization (MFCP) provides a solution to this problem. Currently, the MFCP is facilitated by activated alkynes, and no activated comonomer, i.e. azide, has been reported. In this paper, an activated azide, 4,4′-diazidoperfluorobenzophenone, was designed and synthesized. Compared to the ordinary azide, such a monomer can remarkably accelerate the MFCP with alkynes. Thus, a new MFCP of activated azide and alkyne was established, and polytriazoles with high regioregularity (fraction of 1,4-isomer higher than 82%) and satisfactory molecular weights (Mw up to 34 000) were produced in high yields (up to 95.1%).
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Zhao-Yun Wang,Lei Jin,Jia-Qiang Yang,Yi Zhao,Tao Song,DongPing Zhan,Da-quan Yu,Fang-Zu Yang,Shi-Gang Sun
The uniform thickening of high aspect ratio (AR) through-holes (HAR-TH, AR: 10–12:1) by Cu electronic plating (Cu-EP) is essential in printed circuit boards fabrication, and is often accomplished with organic levelers and at low current densities (6–15 mA/cm 2 ). Nevertheless, the organic levelers are often unstable and the Cu-EP at low current densities presents low production efficiency. In this study, we demonstrate that inorganic compound sodium azide (SAD) can act as a novel leveler in acidic Cu-EP for achieving uniform thickening of HAR-THs (AR: 12:1) even at a high current density of 20 mA/cm 2 . The throwing power using SAD for HAR-THs (AR: 12:1) thickening reaches as high as 94.7 %. Galvanostatic measurements and cyclic voltammetry tests on Pt rotating disk electrode (Pt-RDE) reveal that the competitive adsorption among the three additives of SAD, PEG and SPS occurs only at high rotating rate, referring to a strong inhibition of cupric ions reduction at violent convection area of the HAR-THs mouth. In situ FTIR spectroscopy analyses combined with DFT theoretical calculations illustrate that the synergistic effect of SAD and PEG is manifested by the formation of a PEG-SAD co-adsorption layer. The key to achieving uniform thickening lies in the difference in competitive adsorption abilities between the PEG-SAD co-adsorbed layer and SPS at both mouth and middle part of the HAR-THs. The PEG-SAD co-adsorption layer occupies all active sites of the HAR-THs mouth, preventing SPS from adsorption and thus reducing Cu deposition rate. However, the SPS firmly occupies active sites of middle part of the HAR-THs, facilitating to maintain a consistent Cu deposition rate inside the HAR-THs, consequently achieving uniform Cu thickening of the HAR-THs.
研究领域:
材料科学
·
电化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2018
·Vol. 36
·期 11
·1017-1023
·
IF 2.378
Bo Yang,Xiang Ren,Xuzhong Shen,Tongtong Li,Zhan Lu
A novel difunctionalization of unactivated alkenes has been reported via visible light-promoted three-component carboazidation using TMSN 3 and acrylonitrile as partners without any stoichiometric oxidants. This protocol is operationally simple for straightforward access to azido derivatives with good functional group tolerance from readily available starting materials. A facile azido radical-catalyzed [3 + 2] cycloaddition reaction of vinylcyclopropane with acrylonitrile was also observed to deliver a multi-substituted cyclopentane.
研究领域:
有机化学
·
光化学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Zhenzhan Yan,Li Yang,Wenchao Tong,Ji-Min Han
Copper azide (CA) is one of the preferred primary explosives in the micro-initiating device, and it is of conducive significance to develop high-content CA-modified materials. In this work, we reported two types of CA composites with CA nanorods embedded in carbon nanosheets (CA/C) and CA distributed on salicylic acid (CA/SA) using layered copper hydroxide nanosheets intercalated with salicylic acid as the precursor. The detailed characterizations demonstrated that CA/C exhibits eximious electrostatic sensitivity (1.06 mJ) due to the inherent structural characteristics of CA/C such as the limitation of the free movement of CA by the layered structure and preeminent electrical conductivity of carbon nanosheets. Surprisingly, CA/C with nearly 1.0 mg in the miro-initiating device can reliably detonate Hexanitrohexaazaisowurtzitane (CL-20). CA/C exhibits extremely high CA content (93%), excellent ignition ability, and detonation ability, and its performance is superior to pure CA and most CA-modified materials reported previously. CA/SA also has an excellent detonation ability and its electrostatic sensitivity is as low as 0.92 mJ. These findings provide a new perspective for the development of high-performance primary explosives for the micro-initiating device.
研究领域:
材料科学
·
爆炸化学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Yunfeng Tan,Jiangzhou Qin,Shengquan Chang,Shengqiang Ma,Linan Su,Nengsheng Liu,Quanlin Zhao,Xintao Wang,Chenxi Li,Jinmao Ma,Kun Wu,Zhengfang Ye
The treatment of wastewater containing sodium azide (NaN 3 ) poses a major challenge to environmental protection and public safety. In this study, a multi-scale analysis method integrating experimental optimization, machine learning modeling and theoretical calculation was proposed. The mechanism and optimal conditions of NaN 3 removal by sodium hypochlorite (NaClO) oxidation were systematically studied. Through the combination of single factor experiment design and response surface method (RSM), the optimum treatment conditions were determined as follows: dilution factor was 300, NaClO dosage was 3.5 mL, and pH value was 6.0. Under these conditions, the removal rate of NaN 3 reached 96.53 %. In addition, the developed BP-GA hybrid neural network model showed excellent prediction performance (R 2 = 0.98805). After further optimization of process parameters, the removal rate of NaN 3 increased to 98.2 %. Density functional theory (DFT) calculations revealed the significant effects of pH value and intermediate HOCl on the reaction efficiency, and clarified the microscopic mechanism of the reaction. This study optimizes the treatment process of wastewater containing NaN 3 , which provides a theoretical basis for the design of a new efficient oxidation system and is of great significance for promoting sustainable wastewater treatment.
研究领域:
环境科学
·
化学工程
·
计算化学
✓ 已验证
产品关联
DOI
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2022
·Vol. 47
·期 10
·e202200076
·
IF 2.134
Zhenzhan Yan,Shuang Wang,Li Yang,Jimin Han,Wenchao Tong
In this work, graphene oxide-doped lead-containing metal-organic framework (BTC−Pb/GO) and polyvinyl alcohol were used as raw materials to prepare spherical or cylindrical lead azide composites by freeze-drying, carbonization, and in-situ azide steps. Nanoscale lead azide is uniformly distributed on the graphene-doped porous carbon framework. Detailed characterization and testing show that LA/C/rGO exhibits excellent electrostatic sensitivity (1.94 J) and flame sensitivity (40 cm) due to the excellent electrical and thermal conductivity of porous carbon and graphene, which are superior to most of the previously reported modified lead azide.
研究领域:
材料科学
·
爆炸物化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Rui Xu,Zhenzhan Yan,Li Yang,Qianyou Wang,Wenchao Tong,Naimeng Song,Ji-Min Han,Yang Zhao
Research on green primary explosives with lead-free and excellent ignition performance is of significance for practical applications. In this work, we have developed a novel, green, and facile strategy for synthesizing copper azide@porous carbon hybrids (CA@PC) based on ionic cross-linked hydrogel with low-cost cellulose derivatives as the starting material, in which the CA nanoparticles are uniformly distributed in the porous carbon skeletons. The detailed characterizations and control experiments demonstrated that such an outstanding performance originates from the excellent electric conductivity of nanoscale carbon cages. With the favorable unique structures, the as-prepared hybrids can greatly benefit a new type of energetic materials, which exhibit a very low electrostatic sensitivity of 1.06 mJ. Interestingly, the hybrids possess a high ignition ability, and the flame sensitivity can even achieve 47 cm, superior to those well-developed CA-based materials reported previously. This work paves the way toward the design and development of next-generation highly efficient energetic materials.
研究领域:
材料科学
·
能源化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 38
·385704
·
IF 3.874
Zhenzhan Yan,Li Yang,Ji-Min Han,HaoJie Li
In the wake of the development of micro-initiation systems, traditional lead-based primary explosives hardly satisfy the needs of high energy output. Copper azide (CA), one of the most promising primary explosives, is restricted in practical applications because of its high electrostatic sensitivity and the method of charge in micro-initiation systems. To tackle these issues, two synthetic paths of CA based on a porous graphene skeleton are proposed. First, a viscous homogeneous mixed solution is rapidly frozen in liquid nitrogen to form a spherical copper-containing precursor material. The copper azide/carbon/graphene composite (CA/C/GA) was fabricated by freeze-drying, high-temperature thermal decomposition and in situ azidation. Second, A cylindrical copper/graphene gel formed by high-temperature hydrothermal self-assembly is served as a precursor material. Also, hydrogen reduction and in situ azidation procedures were utilized to synthesize copper azide@graphene foam (CA@GF). Detailed characterization indicates that the excellent performance of composite materials is ascribed to the excellent electrical and thermal conductivity of graphene material. The electrostatic sensitivities of CA/C/GA and CA@GF were 3.6 mJ and 2.5 mJ, respectively, and the flame sensitivity was 50 cm. The course of fabrication is environmentally friendly and easy to perform and it may be well-matched with the charge of the micro-detonation system.
研究领域:
材料科学
·
爆炸化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
·
2012
·
IF 2.947
Xing Li,Jijuan Su,Honghong Chang,Gong Li,Yanwei Li,Wenlong Wei
A simple and efficient method has been developed which describes KOH-oriented catalytic regioselective ring-opening reactions of various N -tosylaziridines with malonates. In the presence of 20 mol% KOH, most N -tosylaziridines can smoothly react with malonates to give the corresponding products in good to excellent yields (up to 99%) and with good to excellent regioselectivity under mild experimental conditions.
研究领域:
有机化学
·
合成化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）