ChemistrySelect
·
2025
·Vol. 10
·期 24
·e02076
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IF 2
Long Guan,Lin Li,Xin Cheng,Kefei Lu,Hao Zhou,Binbin Zhang,Erhai An,Hua Fang,Peng Deng
Graphical Synergistic catalysis ignition and combustion reaction mechanism of nanothermite Al/Bi2O3 with DAP-4 as additives. Aluminium/bismuth trioxide (Al/Bi 2 O 3 ), as a class of important and interesting nanothermite, had received much attention in the field of energetic materials. However, enhancing the ignition and combustion performance of Al/Bi 2 O 3 is still a great challenge. In this work, energetic perovskite DAP-4 was used to design and fabricate the ternary composites Al/Bi 2 O 3 /DAP-4 with the different contents of DAP-4 additives. The micromorphology and structure of composites Al/Bi 2 O 3 /DAP-4 were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). The ignition and combustion performances of composites Al/Bi 2 O 3 /DAP-4 were studied by electric heating ignition apparatus. The results showed that energetic perovskite DAP-4 was introduced to reduce the ignition energy of Al/Bi 2 O 3 and promote the combustion reaction of Al metal particles. With 10wt% DAP-4 added, Al/Bi 2 O 3 /DAP-4 sample showed a more durable combustion process for ∼270 ms. And with the contents of DAP-4 increased, the combustion time shortened and the burning intensity had improved. The intensity of flame combustion reaches the maximum when 30wt% DAP-4 is added. The main thermal decomposition gas products of Al/Bi 2 O 3 /DAP-4 composite are CO 2 , HCl, H 2 O, and so on. A synergistic catalysis ignition and combustion reaction mechanism of Al/Bi 2 O 3 with DAP-4 as additives was proposed. DAP-4 ignited by lower ignition energy could trigger nanothermite Al/Bi 2 O 3 . Bi 2 O 3 particles can reduce the thermal decomposition temperature of DAP-4, which accelerated the combustion reaction of nanothermite Al/Bi 2 O 3 with DAP-4 as additives. This work offered a new idea for design and application of nanothermite with high-performance catalysis additives.
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CHEMICAL PHYSICS
·
2025
·
IF 2.4
Qiuhui Zhao,Yaqi Jing,Jiale Zhang,Jiadan Xue,Jianjun Liu,Jianyuan Qin,Zhi Hong,Yong Du
Isoniazid (INH), a frontline anti-tuberculosis drug, faces rising resistance and hepatotoxicity, motivating crystal-engineering approaches. The INH-4-hydroxybenzoic acid (INH-HBA) cocrystal shows multiple polymorphs, its hydrate exists in two forms whose lattice water markedly alters hydrogen-bond topology and molecular packing. We combined terahertz time-domain spectroscopy (THz-TDS) and FT-Raman spectroscopy with periodic solid-state DFT and potential energy distribution (PED) analysis to assign vibrational modes and link spectral features to structural motifs. Hirshfeld surface analysis indicates form I is dominated by multi-directional O H...N contacts and an R 2 2 ( 8 ) N H...O synthon that yields parallel layered packing. By contrast, form II uses lattice water to bridge O H...O/N H...O interactions and weak C H...O contacts, producing a cross-stacked three-dimensional network lacking R 2 2 ( 8 ) dimers. Observed spectral differences are attributed to these distinct intermolecular interactions and associated vibrations. By integrating experimental and theoretical data, this study provides spectroscopic-structural insights into INH-HBA hydrate polymorphism, offering a foundation for pharmaceutical cocrystal identification and design.
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CHROMATOGRAPHIA
·
2025
·
IF 1.3
Yang Yali,Quan Kaijun,Takafuji Makoto,Chen Jia,Liu Xiuhui,Qiu Hongdeng
C18-modified bipyridinium-functionalized silica was prepared and further modified with tetras(4-sulfonatophenyl)styrene (TPE-SO 3 H) via ion bonding. Thus, two novel stationary phases, including C18-modified bipyridinium stationary phase (Sil-DPC18) and TPE-SO 3 H-functionalized C18-modified bipyridinium stationary phase (Sil-DPC18-TPES) were obtained. The stationary phases were characterized by elemental analysis and Fourier transform infrared spectroscopy (FT-IR). The reversed-phase chromatographic performance of Sil-DPC18 and Sil-DPC18-TPES were evaluated using the Tanaka test mixture, alkylbenzenes, and linear polycyclic aromatic hydrocarbons (PAHs). Compared to an in-house Sil-C18, Sil-DPC18-TPES and Sil-DPC18 exhibited stronger aromatic selectivity and shape selectivity, but weaker hydrophobicity and hydrophobic selectivity. Furthermore, Sil-DPC18-TPES demonstrated better hydrophobicity, hydrophobic selectivity, aromatic selectivity and shape selectivity compared to Sil-DPC18. The enhancement could be due to the introduction of TPE-SO 3 H. In addition, Sil-DPC18-TPES and Sil-DPC18 exhibited good separation selectivity for PAHs, phenylesters, phenols, and phenylamines compared to Sil-C18.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Haixia Zhang,Kaidi Zhao,Jiaping Chen,Renfei Chu,Xinru Xiang,He bian,Chenguang Ding
The polymerizable monomer ETPTA as the inner phase and Tween 80 as the emulsifier to construct O/W emulsions, which could be polymerized to solid polymers by UV-irradiation with the advantages of environmentally friendly and easy preparation. The stirring speed is an important factor affecting the mean size of emulison droplets and solid particles. Increasing the stirring speed is beneficial for the emulsion stabilization due to the small emulison droplets, which can construct smaller solid particles as the carriers of the catalytic active centers. PdNPs as functional metal nanomaterials are selected as the active centers attributed to the peroxidase activity, which can adsorb on the polymer surface (PdNPs@polymer) because of the electrostatic interactions. The analysis of PdNPs@polymer confirm the PdNPs are well-distributed at the polymer surface and have no noticeable aggregation. PdNPs@polymer can reduce 4-NP to 4-AP in the aqueous solution showing remarkable catalytic activity. The carrier polymer particles prepared with the largest stirring speed loaded with PdNPs has the best catalytic activity compared with the low stirring speeds. PdNPs@polymer with higher stirring speed has outstanding catalytic activity due to the numerous emulsion droplets and corresponding solid particles, which are contributed to the loading of PdNPs and improve the catalytic performance. Our findings of the novel catalyst composites are instructive in providing technical guidance for environmental remediation applications with better catalytic activity and being environmentally friendly.
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PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
·
2017
·
IF 0.809
Jin Luo,Anlin Zhao,Caihua Zheng,Tao Wang
GRAPHICAL Display full size
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FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2023
·
IF 2.3
Wei Li,Bei Xi,Jing Ma,XiaoXia Tian,Xu Gao,YanZhong Yang,Liang Xian
Ultrafine Pt nanoparticles (Pt/SWCNTs) supported on single-walled carbon nanotubes (SWCNTs) were prepared by a photochemical method assisted by ethylene glycol (EG) as a reducing agent without the addition of stabilizing agents. the application in the reduction of 4-Nitrophenol (4-NP) was also explored. XRD diffraction patterns show that the content of Pt (111) crystal planes is higher, which is beneficial for improving the catalytic activity of platinum nanoparticles. TEM results showed that Pt/SWCNTs-E3 prepared under Ultra Violet (UV) light irradiation had a small-size particle with an average particle size of about 2.2 nm. XPS results showed that the prepared Pt nanoparticles mainly existed in the form of Pt0. The catalytic performance test results showed that the Pt/SWCNTs prepared under the UV condition of 395 nm had the highest activity for catalyzing the reduction of 4-NP, and the apparent rate constant was k = 0.34 min−1, indicating that it had good catalytic activity. After seven cycles, the conversion rate remains about 83%, which has good reusability and stability. The results show that the aggregation of Pt intermediates can be effectively controlled by photo-induced and strong metal − support interaction (SMSI) to obtain ultrafine nanoparticles dominated by Pt0.
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CHEMICAL PAPERS
·
2016
·Vol. 71
·期 3
·627-637
·
IF 1.326
Yan Liu-qing,Chen Yao,Sun Xiao-fu,You Mao-jun,Chen Xiao-dong,Gu Qiang,Zhang Yu-min
A solvent-free microwave-assisted four-component synthesis of 1,2,4,5 - tetrasubstituted imidazoles bearing a 4-aminophenyl substituent was studied by condensation of p -phenylenediamine, aryl diketone, benzaldehyde derivatives and ammonium acetate in the presence of solid support silica gel and catalyst Keggin-H 3 [PW 12 O 40 ]. The effects of four components molar ratio along with catalyst loading, irradiation time on the yields were investigated. Also, the structures of synthesized compounds were characterized by FT-IR, HRMS, 1 H NMR and 13 C NMR spectroscopy. Furthermore, their ultraviolet–visible maximum absorption, liquid fluorescence emission maximum and quantum yields were, respectively, measured in 0.05 M H 2 SO 4 aqueous solution and in dichloromethane. Simultaneously, solid fluorescence spectra were determined in the powder state. The relationships between the optical behavior and the polarity of the solvents for some compounds were assessed. The results showed that the fluorescence quantum efficiency was increased by introducing amino phenyl in comparison with benzyl on 1-position of trisubstitued imidazoles. The compounds synthesized were sensitive to the polarity of the solvents.
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Journal of Saudi Chemical Society
·
2016
·Vol. 21
·期 3
·315-323
·
IF 1.978
Pei-Yi Wang,Ling Chen,Jian Zhou,He-Shu Fang,Zhi-Bing Wu,Bao-An Song,Song Yang
In this paper, a variety of 1-aryl-4-hydroxy-1 H -pyrrol-2(5 H )-one derivatives bearing 1,3,4-oxadiazole moiety were designed and synthesized. Preliminary bioassays suggested that these compounds not only exhibited favorable antibacterial activity toward plant pathogenic bacteria including Xanthomonas oryzae pv. oryzae ( Xoo ), Ralstonia solanacearum ( R. solanacearum ), and Xanthomonas axonopodis pv. citri. ( Xac ), but also demonstrated certain curative and protective activities against Tobacco mosaic virus (TMV). Further studies revealed that compounds 8a and 8l exerted the best inhibition effect against Xoo with the half-maximal effective concentration (EC 50 ) values of 8.6 and 7.3 μg/mL, respectively, which were better than that of commercial agricultural antibacterial bismerthiazol (EC 50 = 92.6 μg/mL). Given the above results, this kind of compounds can be further studied and explored as alternative antibacterial agents.
研究领域:
药物化学
·
农业化学
·
抗菌剂
·
病毒学
·
有机合成
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INTERNATIONAL IMMUNOPHARMACOLOGY
·
2026
·
IF 4.7
Tianxiao Hu,Jiayu Qi,Yinuo Xu,Jia He,Qingying Tan,Jie Hao,Jing Wang,Jiewei Hong,Jianwei Wang,Lin Chen,Xiaobing Dou
This study aims to investigate the molecular mechanisms by which 4-hydroxynonenal (4-HNE) regulates hydrogen sulfide (H₂S)-producing enzymes, mediating the pathogenesis of metabolic dysfunction-associated fatty liver disease (MAFLD) during pregnancy, thereby offering novel molecular targets for early diagnosis and intervention of related disorders. By establishing a MAFLD pregnant mouse model, we comprehensively examined the regulatory effects of 4-HNE on placental function and its interaction with the H₂S system. We found that MAFLD pregnant mice exhibited significant glucose metabolic disorders, hepatic steatosis, and placental damage. Mechanistically, 4-HNE disrupts H₂S biosynthesis, thereby impairing its inhibitory effect on the inflammasome pathway while simultaneously activating inflammatory cascades. This synergistic action exacerbates placental pathological damage, manifesting as abnormal vascular function and impaired materno-fetal exchange. Notably, exogenous H₂S intervention partially reversed 4-HNE-induced toxicity, suggesting the therapeutic potential of targeting this pathway. These findings demonstrate the pivotal role of the “4-HNE–H₂S–NLRP3” regulatory axis in MAFLD-associated placental injury, providing novel mechanistic insights and potential therapeutic targets for pregnancy complications.
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PubMed
高影响因子
POLYMER
·
2026
·
IF 4.5
Long Jiang,Xinlei Pang,Shenghui Guo,Runan Jia,Xiaobao Zhu,Ming Hou,Li Yang,Jialong Zhang
To address the challenges of high energy consumption and long polymerization times in the traditional synthesis of poly(4-hydroxystyrene) (PHS) resins, this study proposes a novel PHS synthesis method. The method utilizes microwave-assisted heating to synthesize PHS precursors [poly(4-acetoxystyrene) and poly(p-tert-butoxystyrene)]. To assess its feasibility, the dielectric properties of four different PHS precursor reaction systems and their respective monomers were characterized using resonant cavity perturbation techniques over a temperature range of 25-130 °C. The microwave heating characteristics of these systems (or their raw materials) were examined under microwave irradiation at 400 W. Additionally, complementary Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) were performed from 30 °C to 300 °C. The results indicate that the dielectric constants of all four types of systems exceed 4, and the lowest dielectric loss tangent is 0.05. Both (2,2-azobisisobutyronitrile) AIBN initiator systems are capable of increasing their temperature from room temperature to 70 °C within 2 minutes in the microwave field. Similarly, both (2,2,6,6-tetramethylpiperidine-1-oxyl radical) TEMPO and (benzoyl peroxide) BPO systems can elevate their temperature from room temperature to 125 °C in just 4 minutes. These findings provide significant guidance for the development of microwave polymerization-based methods for preparing PHS.
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Surfaces and Interfaces
·
2026
·
IF 6
Yujiao Zou,Bo Ge,Yanhui Hu,Yulu Yang,Ni Li,Yili Zhao
The high catalytic performance induced by the photothermal conversion effect holds immense potential in environmental purification, attracting widespread attention. Herein, the synthesis of PVA/PEI/Au nanofibers was successfully achieved, and they were applied as plasmonic photothermal catalysts to facilitate the reduction of 4-nitrophenol (4-NP). The photothermal performance of nanofibers loaded with different concentrations of Au nanostars (NSs) was compared under near-infrared (NIR) laser irradiation. Remarkably, at low laser power densities under NIR irradiation, the PVA/PEI/Au nanofibers catalyzed the reduction of 4-NP, resulting in a 1.5-fold increase in reaction rate and achieving a 98% conversion efficiency within 8 min. Additionally, the nanofibers demonstrated excellent recyclability, maintaining a conversion efficiency exceeding 97% over six consecutive cycles. The PVA/PEI/Au nanofibers hold significant promise for the practical application of electrospun nanofibers in the photothermal degradation of environmental pollutants.
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JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Yuejia Wu,Li Li,Lina Su,Ling Huang
The elemental doping strategy was widely adopted to improve the ion transport of lanthanum silicate apatites (La 9.33 Si 6 O 26 , LSO), a very promising electrolyte for solid oxide fuel cells (SOFCs). Specifically, La 9.33 Si 5.5 (Ga 1/2 V 1/2 ) 0.5 O 26 , i.e., LSGV 0.5 is obtained through (Ga 1/2 V 1/2 ) 4+ doping, which leads to not only a 4-fold oxygen ion conductivity (15.8 mS/cm at 800 °C) improvement, but also a 150 °C reduced sintering temperature compared with that of LSO. The as-such fabricated SOFC achieves a peak power density of 0.357 W/cm 2 at 800 °C using LSGV 0.5 as the electrolyte, demonstrating the effective complex ion doping towards enhanced performance for apatite-based electrolytes.
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