ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Siqi Zhuo,Xuehua Wang,Lingyu Li,Shan Yang,Yibing Ji
Combining chiral molecules and covalent organic frameworks (COFs) with ordered pores can result in chiral COFs, which may be employed in the fields of chiral chemistry. In this study, we constructed a novel carboxyl-functionalized COF TpBD-3COOH first and then integrated a chiral molecule, heptakis (6-amino-6-deoxy)-β-CD (Am7CD), into TpBD-3COOH to obtain TpBD-Am7CD. Comparing TpBD-3COOH with TpBD-Am7CD, it could be observed that chiral selectivities improved significantly after decorating TpBD-3COOH with Am7CD in the adsorption experiment. Meanwhile, TpBD-Am7CD exhibited similar chiral selective abilities as the previously reported β-CD COF when it was employed to adsorb amino acid enantiomers, while the content of Am7CD was much less than that in β-CD COF. This indicated that the framework of TpBD-3COOH enhanced the chiral selective ability of Am7CD, which would be a great chiral carrier material for further application. This work provides a new insight for establishing materials for application in the chiral recognition field. Besides, TpBD-Am7CD resulted in an insoluble powder, which endowed this material with the possibility to be an adsorbent and a stationary phase in chromatography.
研究领域:
材料科学
·
化学
·
分析化学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Wenwu Zhou,Li Yang,Lang Liu,Zhiping Chen,Anning Zhou,Yating Zhang,Xinfu He,Faxiang Shi,Zegao Zhao
Highly ordered mesoporous TiO 2 -Al 2 O 3 composites with different TiO 2 mass contents (MA-xTi) were successfully synthesized via an improved solvent evaporation-induced self-assembly method and the corresponding NiMo supported hydrodesulfurization (HDS) catalysts were prepared via wetness incipient co-impregnation method. The materials were characterized by means of XRD, ICP-OES, N 2 physical adsorption-desorption, SEM, TEM, Py-FTIR, H 2 -TPR, HRTEM and XPS and the catalytic activities for 4,6-dimethyldibenzothiophene (4,6-DMDBT) HDS over the prepared NiMo/MA-xTi series catalysts were investigated. The results show that the crystal forms, crystal morphologies, pore structures, pore arrangements and acidity properties of the MA-xTi samples varied with the incorporation and increase of TiO 2 species; the interaction between the active metals and the support materials (MSI) can be modulated by the incorporation of TiO 2 species, and TiO 2 incorporation also can promote the formation of the so-called “Type II” NiMoS active phase via changing the morphology of Ni promoted MoS 2 slabs, promoting the sulfidation of both Ni and Mo species and enhancing the proportion of NiMoS phase. The catalytic evaluation results show that the enhancement in the overall HDS activity of the NiMo/MA-xTi series catalysts were mainly contributed by the enhancement in the hydrogenation desulfurization (HYDS) activity. Catalyst NiMo/MA-20Ti exhibited the superior catalytic performance due to its highly ordered mesopore arrangement, proper acidity, moderate MSI, moderate stacking and high proportion of NiMoS phase which leads to more highly active “Type II” active sites.
研究领域:
催化化学
·
材料科学
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DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2019
·Vol. 28
·期 3
·1668-1677
·
IF 1.476
Yuan Min,Zhao Yu,Niu Wenxing,Shi Qi,Xu Hong,Zheng Bin,Dong Jinxiang
In this study, three different zeolitic imidazolate framework (ZIF) materials of ZIF-8, ZIF-71, and MAF-6 were synthesized, and their tribological properties as base grease were evaluated. We demonstrate that the tribological properties of ZIFs are correlated with the framework density/pore volume and the substituted groups. Under 200 N, MAF-6 has the lowest wear volume value and ZIF-71 exhibits the lowest friction coefficient. As the load increased, MAF-6 maintained the best and most stable tribological performances among the three ZIFs additives; however, the properties of ZIF-71 worsened. Thus, MAF-6 exhibits the lowest density and largest solvent-accessible volume (SAV) and has the lowest elastic stiffness; it easily slides and adheres onto the wear surface, forming a tribofilm that reduces friction and prevents severe wear. ZIF-71 with chlorinated groups may enhance the tribological performance; as the load rises, its dense and stiff structure has an adverse effect. These results are expected to be helpful for designing future ZIFs with excellent lubrication properties.
研究领域:
材料科学
·
机械工程
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DOI
高影响因子
STARCH-STARKE
·
2017
·
IF 1.837
Zixing Dong,Xiaoming Hao,Daman S. Pokhrel,Xiaoling Chen,Xiaoguang Liu,Nokuthula P. Mchunu,Kugenthiren Permaul,Suren Singh,Dandan Niu,Zhengxiang Wang
High-glucose syrup has wide applications in the feed and fermentation industries. However, during its regular production process, because of the slow hydrolysis of α-1,6-glucosidic linkages in maltodextrins by glucoamylase, yields of glucose higher than 96% are rarely achieved. To find a suitable enzyme for the saccharification process, two novel genes encoding oligo-1,6-glucosidases (OGL, EC 3.2.1.10) from Bacillus mycoides ( bmogl ) and Thermomyces lanuginosus ( tlogl ) were successfully cloned and overexpressed in Pichia pastoris GS115. At the shake-flask fermentation level, the OGL activities of the two recombinants GS115 (pPIC9K- bmogl ) and GS115 (pPIC9K- tlogl ) were 994 and 1219 U/mL, respectively; and mature enzymes around 66–68 kDa were purified for characterization. Recombinant enzyme TlOGL exhibited higher thermostability than ever reported for OGLs, whereas BmOGL was stable under acidic pH, ranging from 4.0 to 8.0. Among the substrates tested, these two recombinant enzymes efficiently hydrolyzed isomaltose and isomaltotriose, but had no activity against maltose and maltotriose. Besides these characteristics, nearly complete hydrolysis of isomaltotriose and 90% of isomaltooligosaccharides (IMOs) into glucose was also observed for them, which makes them good candidates for subsequent use in improving the yield of glucose from starch. To the best of our knowledge, this is the first report on the expression and characterization of OGLs from B. mycoides and T. lanuginosus .
研究领域:
生物化学
·
分子生物学
·
工业酶学
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DOI
高影响因子
Catalysis Science & Technology
·
2025
·
IF 4.2
Yifan Zhang,Jiaying Liu,Shiwei Wang,Zhihao Yu,Haojian Zhang,Dong Wang,Lin Zhu,Chunzheng Wu,Hongbo Yu
Modifying noble metal catalysts with transition metal oxides (MO x ) can markedly enhance catalytic performance through synergistic effects, yet precise spatial colocalization of active metal and promoter phases remains challenging. Here, we report the synthesis of KIT-6 supported Pd-MO x (M = Fe, Co, Ni) hybrid nanostructures via in situ transformation of bimetallic PdM nanoparticles under controlled thermal conditions. The resulting Pd-MO x /KIT-6 catalysts displayed superior activity and selectivity in the selective hydrogenation of acetophenone to 1-phenylethanol compared with monometallic Pd/KIT-6. Among them, Pd-CoO x /KIT-6 (Pd/Co=1:1) achieved the highest performance, with 99.7% acetophenone conversion and 98.2% selectivity, and demonstrated broad applicability for hydrogenating diverse ketones. Structural and kinetic studies revealed that interfacial Pd-CoO x sites play a pivotal role: Pd domains efficiently dissociate H 2 , while CoO x species enhance acetophenone adsorption. This synergistic interface-driven mechanism provides a general and costeffective strategy for the selective hydrogenation of multifunctional substrates.
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产品关联
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2025
·
IF 3.1
Liu Yinuo,Dai Zhengyuan,Wang Ying,Fu Shanshan,Li Li,Ding Yaping
This study developed a fluorescent molecularly imprinted sensor (CDs@MIPs) for the highly selective detection of the anticancer drug 6-mercaptopurine (6-MP). 6-MP is an anti-cancer drug with myelosuppressive and hepatotoxic effects. If used improperly, it can cause serious adverse reactions in humans and other organisms. The sensor was fabricated via the sol-gel method using blue-emissive nitrogen-doped carbon dots (CDs) as the fluorophore and 3-aminopropyl triethoxysilane (APTES) as the functional monomer. The sensor leveraged molecularly imprinted technology to construct specific recognition cavities, which enabled highly efficient and sensitive detection of 6-MP. Under the optimal experimental conditions and at 325 nm excitation, with the increase of 6-MP concentration, the fluorescence intensity of the sensor at the emission of 415 nm gradually decreases. The sensor demonstrated a linear detection range of 5.0-120.0 µM (Y = − 6.55X + 792.39) with a detection limit of 1.67 µM (S/ N = 3). It exhibited strong anti-interference capability, excellent reproducibility and stable fluorescence performance. When applied to the detection of Mercaptopurine tablets, the method achieved recovery rate of 97.80%-108.63%, providing a highly sensitive and cost-effective analytical approach for clinical drug monitoring.
研究领域:
分析化学
·
生物传感器
·
药物分析
·
纳米材料
·
癌症治疗
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Jiajia Liu,Yaodi Fu,Shimei Liu,Ping Li,Banpeng Cao,Lihong Cheng,Jingjing Liu,Yi Tang,Xiangshu Chen,Hidetoshi Kita,Lingfang Qiu,Shuwang Duo
Ion intercalation technique is an effective strategy for enhancing the separation of photogenerated electron-hole pairs in photocatalysis. In this work, a novel [Mo 7 O 24 ] 6- polyanions-intercalated porous graphitic carbon nitride (MPCN) was synthesized through straightforward calcination process, based on the simple disolution-mixing of precursors and the drying-grinding treatment of the product. By optimizing the intercalation ratio of [Mo 7 O 24 ] 6- polyanions, the resulting MPCN demonstrated not only an extended light absorption range, but also an increased number of active sites. Furthermore, O atoms in the intercalated [Mo 7 O 24 ] 6- polyanions acted as efficient electron acceptors, effectively extracting photo-induced electrons from PCN and thereby promoting photo-induced carrier separation. Driven by the local electric field, the optimized MPCN exhibited a remarkable H 2 evolution rate of 1.08 mmol/g/h, surpassing that of pristine CN and PCN by factors of 2.5 and 2.3, respectively. Additionally, MPCN also behaved superior photocatalytic activity in the degradation of RhB. This work provides a promising approach for addressing energy shortages and environmental remediation through advanced photocatalyst design.
研究领域:
材料科学
·
光催化
·
能量转换
·
环境修复
·
纳米材料
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产品关联
DOI
高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2017
·Vol. 643
·期 16
·1082-1087
·
IF 1.144
Chen Shen,Dajiang Mei,Chuanling Sun,Yunsheng Liu,Yuandong Wu
The selenites, Na 2 Be 3 (SeO 3 ) 4 · H 2 O and Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 , were synthesized under hydrothermal conditions. The crystal structures of Na 2 Be 3 (SeO 3 ) 4 · H 2 O and Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 were determined by single-crystal X-ray diffractions. Na 2 Be 3 (SeO 3 ) 4 · H 2 O crystallizes in the triclinic space group P 1 (no. 2) with unit cell parameters a = 4.8493(9), b = 12.013(2), c = 12.077(2) Å, and Z = 2, whereas Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 crystallizes in the monoclinic space group C 2/ m (no. 12) with lattice cell parameters a = 12.596(6), b = 7.297(4), c = 16.914(8) Å, and Z = 2. Na 2 Be 3 (SeO 3 ) 4 · H 2 O features a three-dimensional open framework structure formed by BeO 4 tetrahedra and SeO 3 trigonal pyramids. Na cations and H 2 O molecules are located in different tunnels. Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 has a structure composed of isolated [Mg(H 2 O) 6 ] octahedra and SeO 3 trigonal pyramids interacted by hydrogen bonds, and Cs cations are resided in-between. Both compounds were characterized by thermogravimetric analysis and FT-IR spectroscopy.
研究领域:
无机化学
·
材料科学
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DOI
高影响因子
MACROMOLECULAR BIOSCIENCE
·
2013
·Vol. 14
·期 2
·280-288
·
IF 3.742
Feifei Li,Bin Chen,Zhaohua Ping,Xiangxiang Jia,Xin Guo,Longqiang Xiao,Lijian Liu
Lipophilic 6- O -poly ( ϵ -caprolactone)- L -ascorbic acid (AA-6-PCL) is synthesized through ROP of ϵ -caprolactone (CL). The number of repeating CL units in the polymer chain varies from 6 to 19. AA-6-PCL loaded supramolecular polymer micelles (SMPMs) are constructed with β-cyclodextrin (β-CD) and PCL as blocks. Transmission electron microscopy images show a nanospheric morphology of the micelles with a size range of 43.3 ± 5.0 nm. The drug loading contents are 22.53–39.23% for AA-6-PCL. AA-6-PCL exhibits high radical scavenging capacity (93.96–96.73%) and efficient scavenging potency, and a cytotoxicity study proves the excellent cytocompatibility of AA-6-PCL loaded β-CD/PCL SMPMs, which altogether herald their potential application in the study of the induced pluripotent stem cells.
研究领域:
材料科学
·
药学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
CHROMATOGRAPHIA
·
2019
·Vol. 82
·期 6
·953-960
·
IF 1.552
Zhang Xiaoyu,Chen Jie,Lian Lili,Wang Xiyue,Guo Xiaoyang,Chen Huijun,Zhu Bo,Hou Shuang,Lou Dawei
A novel needle extraction device packed with heat-resistant fibers coated with perhydroxy cucurbit[6]uril by sol–gel technology was first developed for the analysis of polycyclic aromatic hydrocarbons in actual water samples. Its performance was tested via purge and trap microextraction coupled with gas chromatography. The strong adsorption affinity between polycyclic aromatic hydrocarbons and (OH) 12 Q[6] was attributed to C–H··· π interactions and π – π interactions. The parameters of the extraction device, such as extraction volume, extraction temperature, desorption time, ionic strength, and fiber number, were optimized. Under optimized conditions, the as-prepared extraction device showed good linearity within 0.5–1,500 µg L −1 with low detection limits (0.03–0.2 µg L −1 ). Moreover, the durability of the needle extraction device was excellent and can be used for 60 cycles. Furthermore, the loss rates of the coating fiber were less than 10% after storage for 3 days at room temperature, and the RSD was less than 6.4%.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Zan Tan,Fengping Hou,Xiaojing Yang,Li Yang,Nan Dong
Electrochemical detection of diquat (DQ) herbicide residue faces challenges in achieving the trade-off among selectivity, sensitivity, and stability in complex matrices. To overcome this, we reported a supramolecular electrochemical sensor (P6-TATR/AB/GCE) based on a newly synthesized electron-rich, hydrophobic pillar[6]arene-triazatruxene derivative (P6-TATR) integrated with acetylene black (AB). The sensor leverages the high conductivity and electrocatalytic activity of AB, while P6-TATR enables selective DQ recognition through synergistic electrostatic interaction, host-guest complexation, and competitive adsorption. This synergistic combination facilitates rapid DQ reduction at the electrode interface, enabling high-performance DQ monitoring. The proposed sensor demonstrated a low detection limit (0.784 nM), wide linear range (0.001–16.0 μM), and exceptional specificity against 100-fold interfering pesticides and ions. The sensor exhibited excellent reproducibility, with relative standard deviations (RSD) of 2.43% (intra-day), 2.94% (inter-day), and 3.08% (batch-to-batch). It also demonstrated robust long-term stability, retaining 90.4% of its initial signal after 150 days. Practical application in food and environmental samples yielded satisfactory recoveries (80.0%–116.0%) with RSD ≤ 7.4% ( n = 3), which were corroborated by High Performance Liquid Chromatography (HPLC) validation. The fabricated electrode outperforms existing DQ sensors in selectivity and stability, offering a new strategy for utilizing hydrophobic macrocycles in electrochemical analysis.
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产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2026
·
IF 7.1
Taozhong Zhang,Wanzhong Yin,Jin Yao,Wenju Sun,Weifan Du,Chao Yin,Xiaoqi Ban
The inherent floatability of chalcopyrite and molybdenite, together with the environmental concerns associated with conventional depressants, poses a persistent challenge to their efficient and sustainable separation. Therefore, this study evaluates the potential of 4-amino-6-hydroxy-2-mercaptopyrimidine (AHMM) as an efficient depressant and systematically investigates its role in improving flotation selectivity and regulating interfacial interactions. Micro-flotation experiments showed that at neutral pH and an AHMM concentration of 12 mg/L, the recovery of molybdenite reached 92.91%, whereas that of chalcopyrite was only 7.76%. This large difference corresponds to a selectivity index of 12.48, enabling highly efficient separation of the two minerals. Surface analyses—including zeta potential measurements and surface wettability tests—indicated that AHMM preferentially adsorbed onto chalcopyrite, significantly reducing its hydrophobicity. FTIR and XPS results demonstrated that the S and N atoms of AHMM coordinated with Cu atoms on the chalcopyrite surface, leading to the formation of stable surface complexes. DFT calculations further supported the robust chemisorption of AHMM on the chalcopyrite surface, producing a four-membered chelate via Cu–S and Cu–N coordination. Overall, this study demonstrates that AHMM has significant potential to serve as an efficient and selective depressant for chalcopyrite in Cu–Mo flotation separation processes.
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产品关联
DOI
高影响因子
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