JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Cheng Xie,Fuyi Sun,Xunke Zhao,Cui Wu,Yuanyuan Che
A transient hot-wire method was used in this work to measure the thermal conductivities of methyl 2-methyl-3-nitrobenzoate (MMN) + acetonitrile, N-bromosuccinimide (NBS) + acetonitrile, and MMN + NBS + acetonitrile in the temperature range of T = (300–340) K. For binary systems, measurements were made for the mass fractions of MMN (ω1) range from 0 to 0.45 and the mass fractions of NBS (ω2) range from 0 to 0.30. For the ternary system, measurements were carried out with the ω1 + ω2 range from 0 to 0.45. The expanded uncertainties of the experimental data were estimated to be 2%, while the confidence level was 0.95 (k = 2). The experimental data were correlated as a function of the mass fraction and temperature using a linear thermal conductivity model. The maximum absolute relative deviation between the experimental values and the calculated results from the fitting model were 0.60, 0.16, and 1.30%.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2013
·Vol. 130
·期 6
·4137-4146
·
IF 1.395
Yan-Ling Luo,Xiao-Li Yang,Feng Xu,Ya-Shao Chen,Zhuo-Ma Ren-Ting
A novel A 2 BA 2 -type thermosensitive four-armed star block copolymer, poly( N -isopropyl acrylamide) 2 - b -poly(lactic acid)- b -poly( N -isopropyl acrylamide) 2 , was synthesized by atom transfer radical polymerization and characterized by 1 H-NMR, Fourier transform infrared spectroscopy, and size exclusion chromatography. The copolymers can self-assemble into nanoscale spherical core–shell micelles. Dynamic light scattering, surface tension, and ultraviolet–visible determination revealed that the micelles had hydrodynamic diameters ( D h ) below 200 nm, critical micelle concentrations from 50 to 55 mg/L, ζ potentials from −7 to −19 mV, and cloud points (CPs) of 34–36°C, depending on the [Monomer]/[Macroinitiator] ratios. The CPs and ζ potential absolute values were slightly decreased in simulated physiological media, whereas D h increased somewhat. The hydrophobic camptothecin (CPT) was entrapped in polymer micelles to investigate the thermo-induced drug release. The stability of the CPT-loaded micelles was evaluated by changes in the CPT contents loaded in the micelles and micellar sizes. The MTT cell viability was used to validate the biocompatibility of the developed copolymer micelle aggregates. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 4137–4146, 2013
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ZEITSCHRIFT FUR KRISTALLOGRAPHIE-NEW CRYSTAL STRUCTURES
·
2024
·
IF 0.3
Yu-Pei Xia,Yu-Xin Huang
C 40 H 48 Cu 2 N 12 O 12 , monoclinic, P 2 1 / n (no. 14), a = 10.9519(1) Å, b = 17.4351(2) Å, c = 24.4288(3) Å, β = 102.143(1)°, V = 4560.25(9) Å 3 , Z = 4, R gt ( F ) = 0.0647, w R ref ( F 2 ) = 0.1904, T = 120 K.
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MINERALS ENGINEERING
·
2025
·
IF 5
Qiuyue Sheng,Zhen Li,Wenjing Feng,Yuxuan Yang,Zhanglei Zhu,Ningning Zhang,Wanzhong Yin
As one of the main copper oxide minerals, the strong surface hydrophilicity induces the low recovery of malachite and decreases the utilization efficiency of copper metal. In this work, the interface hydration structure of malachite and regulation mechanism by bis(2-ethylhexyl)phosphate (D2EHPA) were revealed via density functional theory (DFT) calculations, molecular dynamics (MD) simulations, X-ray photoelectron spectroscopy (XPS) analysis, contact angle and Zeta potential measurements. Flotation tests and contact angle measurements showed that D2EHPA exhibited excellent concentration selectivity for malachite against muscovite and quartz, enhanced the malachite recovery to 90.65 % with the dosage of 50 mg/L at pH 7.0, and the contact angle of malachite increased from 23.0° to 111°. Zeta potential analysis confirmed the selective adsorption of D2EHPA on malachite surface, electrostatic attraction occurred between D2EHPA and malachite surface when pH < 8.0. XPS analysis and DFT calculations further confirmed the adsorption of D2EHPA on malachite surface. Moreover, the adsorption of D2EHPA mainly via the chemical bonding between O1 (P=O), O2 (P-OH) and the Cu on malachite surface. MD simulations revealed that the average D2EHPA molecule interaction energy with malachite (−2 0 1) surface was −36.522 kJ/mol, increased the interaction energy of H 2 O on malachite (−2 0 1) surface from −1.293 kJ/mol to −0.824 kJ/mol, decreased the number density of H 2 O molecule towards malachite (−2 0 1) surface from 0.18 Å -3 to 0.12 Å -3 , induced hydrophobicity of malachite surface.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Linkun Liang,Xueping Zheng,Yifang Yao,Shenglin Liu,Jianzhong Wang,Wenshuai Liu,Chunxu Hu,Yuxuan He
In the context of hydrogen energy development, hydrogen production technology based on the hydrolysis of sodium borohydride (NaBH 4 ) has attracted considerable attention owing to its mild reaction conditions and the high-purity hydrogen generation. Nevertheless, the intrinsically sluggish hydrolysis kinetics of NaBH 4 require the development of non-noble metal catalysts that simultaneously achieve high catalytic activity and excellent durability. In this work, a molybdenum-doped cobalt hydroxide (MoO 2 -Co(OH) 2 ) catalyst was fabricated via a homogeneous urea precipitation approach, and its catalytic performance for H 2 generation from NaBH 4 hydrolysis was systematically evaluated. Concurrently, SEM, TEM, and XPS characterizations collectively elucidated the reaction pathway and electronic modulation mechanism involving Mo-doping-induced Co 2+ oxidation and oxygen vacancy generation. Additionally, this study demonstrates that the composite material possesses favorable surface hydrophilicity and exceptional synergistic catalytic activity. Through systematic modulation of the Mo/Co molar ratio, the MoO 2 -Co(OH) 2 catalyst achieved an exceptional hydrogen generation rate (HGR) of 9831.46 mL·min −1 ·g −1 at ambient temperature, concomitant with a markedly reduced activation energy (38.81 kJ·mol −1 ) relative to pristine Co(OH) 2 (68.97 kJ·mol −1 ). Furthermore, the catalytic performance of this system is comparable to, or even superior to, that of state-of-the-art Co-based catalysts. The superior catalytic performance was ascribed to the synergistic contributions of abundant defect sites afforded by the amorphous architecture, the intrinsically enhanced activity stemming from the electronic structure modulation, and the enhanced stability endowed by the compact microstructure.
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Catalysts
·
2026
·Vol. 16
·期 7
·634
·
IF 4.5
Yue Zhao,Ling An,Hui Zhang,Tong Zhang,Xing Zhang,Li Huang,Song Jin,Wei Wang,Ning Li
4-Hydroxycyclopent-2-enone (HCP), a chemical substance with a unique molecular structure and distinct physical properties, is an important intermediate for the synthesis of natural products, chemicals, and liquid fuels, demonstrating exceptionally high application value. This study introduces a novel approach for HCP synthesis via the rearrangement of furfuryl alcohol (FAL). A series of ZnAl-based hydrotalcite (HT) catalysts was prepared and characterized by SEM, XPS, XRD, NH3-TPD, and CO2-TPD. HCP is efficiently synthesized by the rearrangement of furfuryl alcohol in water at a relatively low temperature of 205 °C. Using a 10 wt.% aqueous solution of furfuryl alcohol as the raw material, the yield of HCP remained stable at 80.2% under the selected reaction conditions (ZnAl-HT-1: 1–500 °C as catalyst, 205 °C, and 5 min). It is worth noting that when the concentration of furfuryl alcohol solution was reduced to 5%, the conversion of furfuryl alcohol reached 100%, and the HCP yield reached an excellent 92.5%. The exceptional performance observed can be primarily attributed to several key factors associated with the ZnAl-HT-1: 1–500 °C catalyst: its expansive specific surface area and ample pore volume, the distinctive layered structure inherent to hydrotalcites, and its well-balanced acid–base properties, featuring optimal densities of acid and base sites with a uniform distribution of acidic and basic active centers that cooperate synergistically to promote the reaction.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Zhenzhen Cui,Baoying Wang,Ruirui Li,Zihao Wang,Weicheng Fu,Junying Yan,Liang Wu,Yaoming Wang,Tongwen Xu
The development of efficient separation technologies for Bi3+ is highly desirable to meet the increasing demand for technology-critical bismuth. In this study, bis(2-ethylhexyl) phosphate (HDEHP)-functionalized pore-filling membranes were fabricated for the efficient separation of Bi3+ and Cu2+ via electrodialysis. Microstructural and chemical characterizations demonstrated the superior compatibility between HDEHP and the polymer chains. The tight arrangement of functional groups within the membrane established a continuous transport pathway for metal ions, enabling selective separation of Bi3+ via an ion-exchange process. Under optimal conditions, the Bi3+ flux reached 2.6 mmol m–2 h–1 with an outstanding perm-selectivity PCu2+Bi3+ of 26.3 during electrodialysis. Moreover, the separation efficiency could be further improved by increasing the number of repeating membrane units, laying a foundation for practical industrial applications. This work provides a promising candidate for the efficient and convenient selective recovery of technology-critical metals from industrial wastewater.
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RSC Advances
·
2026
·
IF 6.1
Mingchao Yang,Yaqi Liang,Danhong Zhang,Linfeng Wan,Junsong Liu,Xiaoxi Yuan,Hongdong Li
The development of rapid, sensitive, stable, and reliable detection methods for 2-aminophenol is critical for accurately monitoring its environmental concentration and effectively mitigating the associated health risks. In this work, a boron-doped diamond (BDD) film is proposed as a high-performance electrode to systematically investigate the electrochemical behavior and enable trace-level determination of 2-aminophenol. The oxidation peak current ( I p ) increased significantly with the increasing concentration of 2-aminophenol in the standard phosphate buffer solution (pH = 5). The BDD electrode presents a broad linear detection range of 0.5 to 10 µmol L −1 , with a sensitive detection limit of 0.115 µmol L −1 . The BDD electrode also demonstrated excellent reproducibility and repeatability. Furthermore, considering its unique properties, including super-hardness, chemical inertness, biocompatibility, and outstanding reusability, the BDD electrode offers a robust electrochemical platform for the rapid, accurate, and stable detection of 2-aminophenol in diverse practical applications. The development of rapid, sensitive, stable, and reliable detection methods for 2-aminophenol is critical for accurately monitoring its environmental concentration and effectively mitigating the associated health risks.
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ACS Nano
·
2026
·
IF 17.3
Yinghua Liu,Xufei Wang,Xiaotong Ma,Lu Huang,Penghui Yang,Tao Li,Wenjun Wu,Daoning Zhou,Jin Su,Yang Li
Collagen receptors orchestrate vital extracellular matrix signaling, yet the inability to distinguish functional receptor activation from mere expression in real-time has obscured our understanding of fibrotic progression. Here, we develop a fluorescent triple-helical collagen-mimetic peptide (CMP) probe, [GVMGFO]3, designed to selectively target the ligand-engaging conformation of Discoidin Domain Receptor 2 (DDR2)─the sole receptor tyrosine kinase family that signals collagen. In pulmonary fibrosis, this probe identifies active fibrotic niches in vivo and directly tethers to disease-driving activated fibroblasts to enable precise ex vivo mapping, all without perturbing baseline signaling. Utilizing this tool, we decipher the long-standing mystery of DDR2’s characteristically slow, hours-long activation kinetics. We reveal that while monomeric collagen engagement fails to override constitutive DDR2 internalization, supramolecular fibrillar collagen provides a multivalent physical anchor that arrests DDR2 trafficking at the cell–matrix interface to sustain receptor clustering and phosphorylation. To recapitulate this biophysical requirement, we engineered Zn2+-coordinated supramolecular assemblies of a histidine-modified CMP, [H-GVMGFO-H]3, triggering rapid DDR2 activation within minutes. Our work transforms CMPs from structural models of collagen into programmable chemical tools for dissecting the spatiotemporal dynamics of collagen–receptor interplay, offering a platform for imaging and modulating fibrotic disease.
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ACS Omega
·
2026
·Vol. 11
·期 29
·43288-43299
·
IF 5.2
Li Qiulin,Wang Qiuhong,Li Gang,Han Xiang,Su Bin,Liu Jing,Zhou Anning,Luo Zhenmin,Chen Fuxin
The nitrogen-containing
compounds in coal tar have always
been
an essential focus in the field of sustainable resources. They play
a crucial role in the full utilization of coal-derived energy substances.
The molecular-level structural characterization and quantitative analysis
of nitrogen-containing compounds in coal tar represent key challenges
for the energy and chemical industries. However, the two-dimensional 1 H– 15 N HMBC method suffers from limitations
in quantitative applications owing to low signal sensitivity and poor
compatibility with internal standards. This study screened and validated
a small-molecule internal standard and systematically investigated
its linear response characteristics across various nuclear magnetic
resonance experiments ( 1 H NMR, 19 F NMR, 13 C NMR, 1 H– 13 C HMBC, 1 H– 13 C HSQC, and 1 H– 15 N HMBC). The results showed that the internal standard exhibited
a good linear relationship ( R 2 ≥
0.984) under all tested pulse sequences within a specified concentration
range. In the 1 H– 15 N HMBC experiment,
the peak integral values of the internal standard signal showed excellent
linear correlation with the characteristic signal integral values
of various quinoline compounds ( R 2 ≥
0.957). The internal standard was applied to the analysis of raw and
nitrogen-doped coal tar samples, successfully enabling signal identification
and relative quantification of specific nitrogen-containing compounds
in nitrogen-doped tar, and clearly revealing the structural evolution
patterns in the transformation of particular nitrogen functional groups
during pyrolysis. The cross-sequence linear internal standard developed
in this study addresses the poor internal standard compatibility of
internal standards for quantitative analysis using multipulse NMR
sequences in complex matrices, which helps reduce intersequence systematic
errors, achieve cross-validation, and streamline experimental design
and sample preparation in future applications, and provides a novel
strategy and reliable data support for the quantitative application
of 1 H– 15 N HMBC technology in the fields
of energy and materials.
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Chem Catalysis
·
2026
·
IF 10.7
Qingmao Yang,Yang Zhang,Xiao Liang,Haodong Chu,Mengdi Li,Runqing Xiao,Weichen Zhao,Chun Shen,Tianwei Tan
Green synthesis of biobased adipic acid (AA) from hydroxyacid feedstocks is challenging due to competing reactivity of hydroxyl and carboxyl groups. Here, we report an aqueous strategy that enables selective removal of the hydroxyl group in 2-hydroxyadipic acid (2-HAA) using a MoO x -Pd/TiO 2 catalyst with in situ -generated Mo–O–H sites. The catalyst achieves 97.3% selectivity to AA. Kinetic analyses, CO and H 2 pulse titration experiments, in situ X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT) calculations show that Mo–O–H sites preferentially interact with the hydroxyl group and promote C–O bond cleavage while suppressing side reactions. This study provides mechanistic guidance for rational catalyst design in upgrading biomass-derived hydroxyacids to value-added diacids.
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JOURNAL OF FOOD SCIENCE
·
2026
·Vol. 91
·期 2
·e70878
·
IF 3.4
Naijun Dong,Nasha Wu,Shu Huang,Yuesheng Dong,Zhilong Xiu
Type 2 diabetes mellitus (T2DM), one of the most rapidly growing metabolic disorders globally, poses a substantial public health burden. In this study, a novel edible eutectogel was innovatively developed for the co-delivery of natural active ingredients, baicalein (Bai), and 1-deoxynojirimycin (DNJ). Utilizing a deep eutectic solvent (DES) system, the hydrophobic Bai and hydrophilic DNJ were co-dissolved and encapsulated within the eutectogel (Bai-DNJ/EG), enabling gastric protection and targeted intestinal release. Animal experimental demonstrated that the Bai-DNJ/EG significantly ameliorated multiple pathological features, including blood glucose reduction, improved insulin sensitivity, attenuated systemic inflammation, decreased fat accumulation, and mitigated organ damage. Compared with Bai/EG and DNJ/EG, Bai-DNJ/EG exhibited superior therapeutic efficacy across all parameters, indicating a synergistic effect between the Bai and DNJ. The dose of Bai in Bai-DNJ/EG was reduced by 50% relative to previous studies, and DNJ was 7.5 times less than that of clinical use in a Chinese herbal preparation for lowering blood glucose. In addition, comparison of lipid metabolism and inflammatory factors between Bai HG and Bai/EG groups indicated that DES enhanced the pharmacological activity of Bai by improving its solubility. Furthermore, 16S rRNA sequencing revealed that Bai-DNJ/EG positively regulates gut microbiota homeostasis and repairs the intestinal barrier. Bai-DNJ/EG inhibited deleterious bacteria including Methanobacteriaceae, Pseudomonadota , Campylobacterota , and Spirochaetota , while promoted the SCFA-producing bacteria, for example, Muribaculaceae and Butyricicoccaceae. This study presents a groundbreaking strategy for the synergistic delivery of natural bioactives and establishes a new paradigm for modernized traditional natural medicine formulations.
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