JOURNAL OF LUMINESCENCE
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2025
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IF 3.6
Hongyu Liu,Yue Zhang,Shuo Song,Xinxin Guo,Liwei Wang,Qiang Fu,Wenzhi Wang
CsPbBr 3 perovskite quantum dots (PQDs) have been considered as potential luminescent materials for lighting and display applications. The oleylamine (OLA) is usually considered to be an indispensable surface ligand in the synthesis of PQDs. However, the long-chain amines can cause more surface defects, resulting in the poor stability and optical performance, which will greatly limit its practical application. Herein, the n-amylamine (ALA) with short carbon chain has been chosen to replace the OLA as surface ligand to synthesize the CsPbBr 3 PQDs. Under the synergic action of oleic acid (OA), ALA-CsPbBr 3 PQDs with enhanced air/thermal stability and optical properties can be obtained through a modified hot-injection method. The ALA-CsPbBr 3 PQDs possess highly monodisperse cubic morphologies (∼10 nm edge lengths), which are similar to the OLA-CsPbBr 3 PQDs. Meanwhile, ligand substitution does not alter the crystal structure, and maintain the cubic crystal structure of CsPbBr 3 . The synthesized ALA-CsPbBr 3 PQDs exhibits a PLQY of 91.3 %, significantly higher than that of OLA-CsPbBr 3 (70.42 %). Photo-stability test indicates that ALA-CsPbBr 3 PQDs are markedly more stable than OLA-CsPbBr 3 PQDs, owing to the passivation of the surface defects. Furthermore, the activation energy of ALA-CsPbBr 3 PQDs (570.8 meV) is higher than OLA-CsPbBr 3 PQDs (495.4 meV), indicating the ALA-CsPbBr 3 PQDs have the much higher thermal stability. In addition, the ALA-CsPbBr 3 PQDs can also be efficiently excited by X-rays, showing a linear response to X-ray radiation, and have good X-ray imaging capability. The CsPbBr 3 PQDs with enhanced stability and optical properties, which are modified by short carbon-chain surface ligands, can further strengthen the competitiveness of PQDs for optoelectronic device applications.
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高影响因子
CERAMICS INTERNATIONAL
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2025
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IF 5.6
Zijing Hao,Jiaqing Zhao,Jinhong Li,Jianbo Gao
Compressive strength is vital for porous cordierite ceramics widely used in thermal storage, thermal insulation, refractory materials, and catalyst supports, but conventional reinforcement methods often come at the cost of sacrificing porosity. This work aimed to produce high-strength porous cordierite ceramics from emulsions stabilized by submicron-sized, plate-like cordierite particles. The strong adsorption of pentylamine-modified particles at the oil-water interface and the formation of an attractive particle network throughout the continuous phase stabilized the emulsions to withstand room-temperature drying without structural distortion. The high-aspect-ratio particle morphology facilitated their preferred orientation during emulsification and sintering processes, thereby imparting remarkable mechanical properties to the ceramic bodies. By adjusting sintering temperature and pentylamine concentration, compressive strengths ranging from 32.6 to 67.4 MPa were obtained from porous cordierites with a porosity of 54.8 %–69.0 %. Such high strength values were attributed to the strong pore walls endowed by high interfacial coverage and the dense struts formed by stacked plate-like particles in the continuous phase.
研究领域:
材料科学
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陶瓷与复合材料
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胶体与界面科学
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2026
·Vol. 46
·期 10
·118295
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IF 6.3
Zijing Hao,Jiaqing Zhao,Jinhong Li,Jianbo Gao
This study develops a new type of lightweight, high-strength porous cordierite ceramic with isolated spherical pore structures by using oil-in-water (O/W) emulsions stabilized by synthesized submicron cordierite platelets as precursors. The particle hydrophobicity required for oil-water interface stabilization originates from in-situ adsorption of short-chain amines on particle surfaces. The type of dispersed system formed via mechanical shearing depends on amine concentrations and alkyl chain lengths. While stable O/W emulsions are formed at higher amine concentrations, the threshold for complete emulsification decreases with increasing alkyl chain length. Increasing amine concentration improves emulsion viscosity and stability, ultimately reducing the average droplet size. The preferred orientations of cordierite platelets at the oil-water interface and in the continuous phase lead to strong multilayered pore walls and dense struts during sintering, endowing the 65%-porous ceramic bodies with a compressive strength tunable by pentylamine concentration and up to 69.2 MPa.
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高影响因子
Green Energy & Environment
·
2025
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IF 14.6
Xiang Hui,Jianhui Shi,Jiajun Zhang,Yan Cao,Huiquan Li,Peng He,Liguo Wang
The carbonylation of amines offers a promising route for synthesizing N-substituted carbamates with high atom economy. However, conventional catalysts exhibit limited catalytic efficiency, and the underlying proton transfer mechanism remains elusive. Herein, we reported a metal-free, room-temperature strategy utilizing 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) as a dual hydrogen bond catalyst to synergistically activate propylamine (PA) and dimethyl carbonate (DMC). This green catalytic system achieves a 10-fold acceleration in reaction rate compared to other hydrogen bonding catalysts under mild conditions. This is enabled by dual hydrogen bonding of TBD with PA and DMC, which facilitates rapid proton transfer and stabilizes tetrahedral intermediates. Theoretical calculations confirm that the dual hydrogen bond system significantly lowers activation energy compared to single hydrogen bond analogs. Furthermore, it was revealed that the hydrogen bonding network within the product is the primary factor responsible for the sluggish reaction rate. This study demonstrates the effectiveness of a dual hydrogen bond system in accelerating the carbonylation of amines and provides a green route to access carbamates.
研究领域:
化学
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催化科学
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有机合成
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高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
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2025
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IF 4.4
Jinglong Li,Meiyu Zhen,Yutao Feng,Ziyi Lu,Chang Wang,Xiaoqing Xiong
Alkyl-chain anthraquinone dyes have promising performance but face application constraints due to hydrophobicity and pollution in conventional water-based dyeing. This study developed an eco-friendly synthesis and dyeing approach. Six dyes (AQ-5 to AQ-7, CAQ-5 to CAQ-7) were synthesized in supercritical carbon dioxide (scCO₂) via reactions of 1-chloroanthraquinone/1,5-dichloroanthraquinone with n -alkylamines. They showed good light absorption and thermal stability (5% weight loss at 245–298°C, suitable for scCO₂ dyeing). Meanwhile, scCO₂ dyeing regularity was revealed through the synergistic regulation of multiple parameters. Optimal scCO₂ dyeing conditions for polyester were determined: 16 MPa, 130°C, 90 min for AQ-5–AQ-7; the optimal dyeing conditions for CAQ-5–CAQ-7 were determined and these were included in the range of 120-135 °C, 16 MPa, 70-100 min. Dyed fabrics had uniform fixation with excellent washing, dry, and wet rubbing over than grade 4, and good light fastness. This work establishes a green scCO₂ system, overcoming traditional limitations, and provides a theoretical basis for eco-friendly dyes/technologies.
研究领域:
纺织化学
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绿色化学
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染料技术
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可持续材料
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化学工程
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高影响因子
Bioactive Materials
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2025
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IF 20.3
Tianyi Zhang,Yuhui Wu,Ye Tian,Youxiang Wang,Peng Zhang,Qiannuan Shi,Qun Fang,Jianzhang Pan,Qiao Jin,Jian Ji
Antimicrobial peptides (AMPs)-mimicking antimicrobial polymers show great potential as therapeutic alternatives to antibiotics in the looming “post-antibiotic era”. However, the discovery of new AMP-mimicking antimicrobial polymers is challenging due to the vast chemical space of side-chain combinations. The advancement of AI-guided high-throughput screening enables more efficient, precise, and intelligent material design. Herein, we integrate combinatorial chemistry, machine learning, and automated high-throughput synthesis and characterization platforms to establish a new paradigm for the design of antimicrobial polymers with excellent biocompatibility. Starting with a library of 13,728 combinations, a seed dataset of 400 structures is generated, followed by four Design-Build-Test-Learn iterations using a new machine learning model. 7 top-performing candidates are screened with a minimum inhibitory concentration (MIC) ≤ 8 μg/mL and an inhibitory concentration causing 20 % cell death (IC 20 ) ≥ 64 μg/mL. The highest-performing polymer (MIC 2 μg/mL, IC 20 256 μg/mL) shows similar in vivo therapeutic efficacy with ceftazidime. Overall, the integration of AI-guided high-throughput screening and combinatorial chemistry accelerates the discovery of new antimicrobial polymers, which provides a scalable strategy for developing novel antimicrobial agents.
研究领域:
材料科学
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抗菌研究
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药物设计中的人工智能
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聚合物化学
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高通量筛选
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生物医学工程
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PubMed
高影响因子
Journal of Energy Chemistry
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2024
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IF 14
Gomaa Mohamed Gomaa Khalaf,Xinzhao Zhao,Mingyu Li,Chunxia Li,Salman Ali,Tianjun Ma,Hsien-Yi Hsu,Jianbin Zhang,Haisheng Song
Lead sulfide quantum dots (PbS QDs) hold unique characteristics, including bandgap tunability, solution-processability etc., which make them highly applicable in tandem solar cells (TSCs). In all QD TSCs, its efficiency lags much behind to their single junction counterparts due to the deficient interconnection layer (ICL) and defective subcells. To improve TSCs performance, we developed three kinds of ICL structures based on 1.34 and 0.96 eV PbS QDs subcells. The control, 1,2-ethanedithiol capped PbS QDs (PbS-EDT)/Au/tin dioxide (SnO 2 )/zinc oxide (ZnO), utilized SnO 2 layer to obtain high surface compactness. However, its energy level mismatch causes incomplete recombination. Bypassing it, the second ICL (PbS-EDT/Au/ZnO) removed SnO 2 and boosted the power conversion efficiency (PCE) from 5.75% to 8.69%. In the third ICL (PbS-EDT/poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA)/Au/ZnO), a thin layer of PTAA can effectively fill fissures on the surface of PbS-EDT and also protect the front cells from solvent penetration. This TSC obtained a PCE of 9.49% with an open circuit voltage of 0.91 V, a short circuit current density of 15.47 mA/cm 2 , and a fill factor of 67.7%. To the best of our knowledge, this was the highest PCE achieved by all PbS QD TSCs reported to date. These TSCs maintained stable performance for a long working time under ambient conditions.
研究领域:
材料科学
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能源技术
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高影响因子
Science China-Chemistry
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2024
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IF 10.4
Zhang Luzhi,Huang Hongfei,Sun Lijie,Ma Xiaopeng,Tan Hui,You Zhengwei
Sequence regulation provides an effective approach to controlling the properties of polymer materials. However, this approach remains an open question in the field of dynamic polymers, which emerge as more and more important new generation materials. Herein, we systematically investigate the effect of sequence control of dynamic covalent units in tuning the properties of materials. Different sequence-controlled poly(oxime-urethanes) are designed. The dynamic oxime-urethane groups are relatively dispersed (SCP-1) or concentrated (SCP-2) distributed in their molecular chains. The sequence control strategy provides an efficient way to decouple the mechanical and self-healing performance of polymers, which is one of the most pressing challenges in the field. The relatively dispersed oxime-urethane groups in SCP-1 not only facilitate the reorganization of the dynamic covalent bonds but also increase the probability of the reformation of hydrogen bonds. The reversible dissociation/reassociation of dynamic bonds is conducive to dissipating energy to enhance mechanical performance and promote self-healing properties. As a result, SCP-1 exhibits much faster self-healing than SCP-2, and its tensile strength is nearly twice that of SCP-2. In addition, energy dissipation capacity and degradation behavior also show significant sequence dependence. Overall, this work reveals a new molecular structure-property relationship and provides a powerful strategy to construct high-performance polymers.
研究领域:
材料科学
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高分子化学
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高影响因子
Materials Today Chemistry
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2024
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IF 6.7
Zhizhu Yue,Yonghe Yu,Tianjun Hu,Ying Wang,Lulu Cao,Yanxia Zhang,Yuhong Chang,Linjuan Pei,Jianfeng Jia
The development of economical multiphase photocatalysts is a significant challenge in achieving large-scale industrialization. Rational catalyst design can help in achieving efficient, energy-saving, and green catalytic reactions, making it more feasible to screen potential catalyst candidates. In this paper, we have successfully developed a high-efficiency photocatalyst Cu-doped Cu 2 WO 4 (OH) 2 (CWOH-y, where y represents the molar ratio of copper tungsten source), which can catalyze the aerobic coupling reaction of amines to produce corresponding imines under visible light irradiation. N-benzylidenebenzylamine is synthesized under visible light at 25 °C with an 89 % yield. Under natural light at around 35 °C (mean light intensity of 50 mW/cm 2 ), 94 % of the benzylamine is converted, and 97 % of the product is N-benzylidenebenzylamine. The catalyst exhibits high efficiency due to the synergistic effect of doped Cu, Cu 2 WO 4 (OH) 2 , and visible light. This combination generates a significant amount of superoxide free radicals and singlet oxygen when exposed to visible light. Furthermore, the catalyst demonstrates universality and stability with a wide range of amine derivatives. This study introduces a new environmentally friendly photocatalytic pathway for the synthesis of imines and emphasizes the potential applications of Cu 2 WO 4 (OH) 2 .
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高影响因子
OPTICAL MATERIALS
·
2025
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IF 4.2
Yu Lu,Zhixu Wu,Pengfei Xiang,Taiming Ji,Rongxin Tang,Yuhao Wang,Yong Xia
Lead sulfide (PbS) colloidal quantum dots (CQDs) are widely used for infrared detection and imaging. Currently, the most popular device structures for PbS CQDs photodetectors (PDs) are p-i-n type. Among them, the PbS CQDs films treated with 1,2-ethanedithiol (EDT) are extensively utilized as hole transport layers. However, the energy band alignment based on the PbS-EDT layer has a great impact on the device performance and has not been thoroughly investigated. To systematically explore the effect of the bandgap of PbS-EDT layer on device performance, this work is firstly based on the PbS-EDT layer simulated through SCAPS-1D software. When the PbS-EDT layer bandgap is 1.4 eV, the device can build a suitable gradient energy band structure and the dark current density (J dark ) reaches the lowest. Based on the simulation results, the corresponding PbS CQDs PDs were fabricated, which showed excellent performance with the J dark of 265 nA/cm 2 at a bias voltage of −0.5V, the responsivity and specific detectivity reached 0.65 A/W and 5.73 × 10 12 Jones, respectively. A single-element scanning infrared imaging system demonstrates the excellent imaging capability of the device. The energy band alignment strategy based on the PbS-EDT layer is expected to promote infrared optoelectronic applications in this field.
研究领域:
材料科学
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光电子学
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高影响因子
LANGMUIR
·
2021
·
IF 3.882
Shiyu Wu,Yufu Yi,Shengliang Liao,Hongyan Si,Yuling Yang,Guorong Fan,Peng Wang
We described the comprehensive synthesis, characterization, and catalytic performance of a novel type of the ordered cubic Ia3̅d supermicroporous silicas by using tetraethyl orthosilicate as a silicon source and a hydroxyl-functionalized quaternary ammonium salt as a template under alkali conditions. The effects of various reaction conditions on the pore structure and morphology of the silica materials were thoroughly investigated. Our results showed that under a wide range of reaction conditions, supermicroporous silicas with a highly ordered cubic Ia3̅d structure can be produced with a large BET specific surface area of 1741 m2/g, high pore volume of 0.91 cm3/g, concentrated pore size at 19.1 Å, and crystalline morphology. After Al doping, the obtained aluminosilicates preserved a highly ordered cubic supermicroporous structure. By using the H-form aluminosilicates as catalysts, we selectively dimerized β-pinene. The catalysts exhibited an excellent catalytic activity for β-pinene dimerization with a conversion yield up to 100%. Compared with conventional mesoporous H-form Al-MCM-48 catalysts, the prepared supermicroporous catalysts exhibited superior catalytic performance due to their excellent shape-selective properties, producing the β-pinene dimer in a yield up to 72.4% with dimer/oligomer ratios in the range of 7.5–10.1. This study featured a detailed preparation and characterization of supermicroporous silica with novel microstructures and showed its utility in catalytic dimerization.
研究领域:
材料科学
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催化化学
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PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2020
·
IF 4.192
Shichao Xu,Xiaojing Zeng,Songlin Dai,Jing Wang,Yuxiang Chen,Jie Song,Yunfei Shi,Xian Cheng,Shengliang Liao,Zhendong Zhao
In this study, we will report on the synthesis and application of efficient botanical agrochemicals from turpentine for sustainable crop protection. Two series of turpentine derived secondary amines were synthesized and identified by FT-IR, 1H NMR, 13C NMR, and HRMS. The herbicidal activities against Echinochloa crus-galli were evaluated. The potential toxicity of the synthesized compounds was tested by MTT cytotoxicity analysis. The effect of structure of the synthesized secondary amines and corresponding Schiff base compounds on their activities was investigated by quantitative structure–activity relationship (QSAR) study. All target products were found to be low toxicity, with similar or higher herbicidal activities than commercial herbicides diuron and Glyphosate. Results of QSAR study showed that a best four-descriptor QSAR model with R2 of 0.880 and Rloo2 of 0.818 was obtained. The four descriptors most relevant to the herbicidal activities are the min valency of a N atom, the max total interaction for a C−H bond, the relative number of aromatic bonds, and the min partial charge (Qmin).
研究领域:
农业化学
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植物科学
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药学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）