EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2024
·Vol. 27
·期 9
·e202300707
·
IF 2.2
Xiaomeng Cheng,Chengxiang Lv,Shufang Zhang,Mingcui Ding,Bingying Pan
We report the magnetic and optical properties of Fe 2 (HPO 3 ) 3 ⋅ 4H 2 O. By combined magnetic susceptibility and specific heat measurements, we find two antiferromagnetic (AFM) transitions ( T N1 =9 K, T N2 =5 K) which originate from the AFM exchange interactions mediated by the (HPO 3 ) 2− anions. Compared with the non-hydrated compound Fe 2 (HPO 3 ) 3 , the magnetic interaction strength and ordering temperature of Fe 2 (HPO 3 ) 3 ⋅ 4H 2 O are both reduced by a factor of ~2. Through density functional theory (DFT) analysis we find almost degenerate AFM states in Fe 2 (HPO 3 ) 3 ⋅ 4H 2 O which are close in energy. The competition of these AFM states might lead to the two successive AFM phase transitions at low temperature. The low ordering temperature as well as competing AFM states both imply frustrated magnetism in Fe 2 (HPO 3 ) 3 ⋅ 4H 2 O, probably originating from the complex competing AFM interactions. The optical properties of Fe 2 (HPO 3 ) 3 ⋅ 4H 2 O are also investigated by photoluminescence and infrared spectroscopies. Graphical By combined magnetic susceptibility and specific heat measurements, we find two successive antiferromagnetic (AFM) transitions at ~9 K and ~5 K in Fe 2 (HPO 3 ) 3 ⋅ 4H 2 O. Through density functional theory (DFT) analysis we have calculated the AFM states. Two AFM configurations, namely AFM I and AFM II, are almost degenerate in energy and their competition leads to the two successive AFM phase transitions at low temperature, reflecting the frustrated magnetism in Fe 2 (HPO 3 ) 3 ⋅ 4H 2 O.
研究领域:
凝聚态物理
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磁性与磁性材料
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无机化学
·
强关联电子体系
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Acta Crystallographica Section C-Structural Chemistry
·
2014
·Vol. 70
·期 11
·1050-1053
·
IF 0.535
Li X.,Wang Z.-G.,Chen H.-H.,Liu S.-G.
The title compound, C18H28O3, was prepared by the reaction of 2,6-di-tert-butylphenol with methyl acrylate under basic conditions using dimethyl sulfoxide as the promoter. The structure of this antioxidant indicates significant strain between the ortho tert-butyl substituents and the phenolic OH group. In spite of the steric crowding of the OH group, it participates in intermolecular hydrogen bonding with the ester carbonyl O atom.
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RSC Advances
·
2026
·Vol. 16
·期 25
·22641-22646
·
IF 6.1
Yining Xuan,Lianbao Ye,Lilan Jin,Weiqi Li
The reaction of α, β-epoxy esters with N-alkyl-1-phenylmethanimine oxides in the presence of a Lewis acid was explored in this study. A substrate sustained-release strategy was successfully employed to overcome the inherent conflict between substrate activation and catalyst poisoning, allowing for the efficient synthesis of a variety of substituted isoxazolidin-3-ones. The reaction employs inexpensive and readily available starting materials, proceeds under mild conditions, and demonstrates broad substrate compatibility. Moreover, when chiral epoxy substrates were used, the products were obtained with high retention of enantiomeric purity.
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TOXICOLOGY AND APPLIED PHARMACOLOGY
·
2026
·
IF 3.6
Shangxiang Feng,Kun Song,Hao Zhang,Zhuoqun Wang,Yuchi Zhao,Zhongyuan Zhao,Chao Wan
This study investigated the effects of Aureusidin on extracellular matrix (ECM) degradation and pyroptosis of chondrocytes in osteoarthritis. Network pharmacology, molecular docking, and pull-down assays were initially conducted to explore the target of Aureusidin. Subsequently, Sprague-Dawley rats underwent anterior cruciate ligament transection (ACLT) received oral administration of Aureusidin. Cartilage damage was evaluated histopathologically by H&E and Safranin O-fast green staining. Primary rat chondrocytes were treated with Aureusidin under IL-1β stimulation. Pyroptotic morphology was observed under light microscopy. Propidium iodide staining and flow cytometry were conducted to evaluate membrane rupture. The expression of markers associated with ECM degradation and pyroptosis was analyzed by qRT-PCR, Western blot, immunohistochemistry, and ELISA. Caspase-3 was identified as a target for Aureusidin. Aureusidin (5, 10, 20 mg/kg) alleviated ACLT-induced cartilage damage and ECM degradation. It reduced the OARSI score and serum levels of CTX-II and COMP, while upregulating the expression of Col2a1 and Acan , and downregulating Adamts5 , Mmp13 , and Mmp3 . Aureusidin also mitigated atypical pyroptosis, evidenced by inhibited expression of GSDME-N, Caspase-3, and Cleaved-Caspase-3, and decreased levels of IL-1β and IL-18. In IL-1β-stimulated primary chondrocytes, Aureusidin (5, 10, 20 μM) attenuated ECM degradation and Caspase-3/GSDME-mediated pyroptosis. Treating chondrocytes with the Caspase-3 inhibitor Z -DEVD-FMK under IL-1β-stimulated conditions alleviated ECM degradation and pyroptosis, but the additional application of Aureusidin did not provide further inhibition. Aureusidin has the potential to inhibit ECM degradation and Caspase-3/GSDME-mediated chondrocyte pyroptosis during osteoarthritis progression. Its therapeutic effects are dependent on binding to and modulating the Caspase-3.
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POLYHEDRON
·
2025
·
IF 2.6
Runqing Liu,Yuntian Zhao,Jiming Huang,Shibo Guan,Senling Leng
A new mixed rare-earth metal borate, Cd 3 Sc(BO 3 ) 3 was synthesized via a high-temperature solution method. Single-crystal X-ray diffraction reveals that it crystallizes in the trigonal space group R 3 ¯ (No. 148) with lattice parameters a = 11.5902(19) Å, c = 9.4230(14) Å, and Z = 6. The structure exhibits 1D ∞ [ScB 6 O 18 ] chains comprised of Sc-centered O octahedra and BO 3 triangles, and Cd atoms located in the space to balance charge. The synthesis, single crystal growth, thermal behavior, IR, Raman and UV–vis-NIR diffuse reflectance spectrums, luminescent property of the title compound have been characterized and analyzed. First-principles simulations for Cd 3 Sc(BO 3 ) 3 have been employed to rationalize the correlations between the molecular structure and optical properties.
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Frontiers in Chemistry
·
2023
·
IF 5.5
Sun Lixia,Hu Jiayan,Bai Weiqi,Mao Wutao,Song Zhongcheng
The hunt for a higher power storage, relatively inexpensive, non-polluting battery technology is currently a pressing issue because of the rapid growth of the worldwide economic and the progressively significant environmental pollution. Among the possible nanomaterials for rechargeable batteries that can have heteroatoms applied to it in order to improve its electrochemical behavior is LixTiy(PO4)3. Carbon-coated Mn-doped Li2Mn0.1Ti1.9(PO4)3 materials was synthesized by spray drying method. The material was characterized by XRD, SEM, TEM, BET, TGA et al. Crystal data refinement results by Rietveld method showed that the symmetry space group is Pbcn.The lattice parameters of Li2Mn0.1Ti1.9(PO4)3 are a = 11.9372 Å, b = 8.5409 Å, c = 8.5979 Å, α = β = γ = 90°, V = 876.59 Å3 and Z = 4). Rietveld refinement was performed, and the confidence factors are Rwp = 11.79%, Rp = 9.14%, and χ2 = 1.425. It was exhibited that LMTP0.1/CA-700 material has good crystallinity. Testing the cells with LAND test procedure (200 mA/g current density for 200 cycles), the LMTP0.1/CA-700 material has a discharge specific capacity of about 65 mAh/g. The capacity decayed by only 3% during the cycle. It has some potential application values as cathode of lithium ion battery in the future.
研究领域:
材料科学
·
电化学
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CHINESE JOURNAL OF CHEMISTRY
·
2022
·Vol. 41
·期 3
·307-313
·
IF 5.56
Run-Ze Yuan,Peng-Fei Cui,Yue-Jian Lin,Guo-Xin Jin
Comprehensive Summary Herein, we describe the synthesis of a carborane-supported octanuclear palladacycle complex, Pd 8 ( o -C 2 B 10 H 10 CS 2 CH 3 ) 4 Cl 4 (CH 3 CN) 4 (complex 1 ), with B(3)–H activations on o -carborane ligand. The substitution reaction of 1 has been explored, and three of its substituted complexes Pd 8 ( o -C 2 B 10 H 10 CS 2 CH 3 ) 4 Cl 4 (L) 4 (L = t BuNC, 2 ; L = C 5 H 5 N, 3 ; L = C 4 H 8 S, 4 ) have been synthesized. The m - and p -carborane disubstituted ligands m - and p -C 2 B 10 H 10 (CS 2 CH 3 ) 2 (ligands 5 and 6 ) as well as their B—H activated carborane complexes [ m -C 2 B 10 H 9 (CS 2 CH 3 ) 2 PdCl] ( 7 ) and [ p -C 2 B 10 H 8 (CS 2 CH 3 ) 2 ][PdCl( t BuNC)] 2 ( 8 ) have also been synthesized by the similar method. All of these complexes have been characterized, including X-ray single crystal diffraction, NMR spectroscopy, IR spectroscopy and elemental analysis methods.
研究领域:
无机化学
·
材料科学
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LIQUID CRYSTALS
·
2012
·
IF 1.858
Pei Chen,Yan Li,Xinbing Chen,Zhongwei An
A series of coumarin derivatives, 7-alkoxycoumarin-3-carbonyl hydrazine (nCCH), which possessed a hydrazine moiety at the end of the molecule was prepared and was characterised by infrared and 1H-nuclear magnetic resonance spectra, electrospray ionisation-mass spectrometry and elemental analysis. All the compounds exhibited enantiotropic mesophases with temperature domains of 67–82°C and 46–82°C on heating and cooling processes, as well as favourable gelability to kinds of organic solvents. The effect of the length of the alkoxy chain on mesomorphic and gelation properties was discussed. The studies revealed that hydrogen bonding between the nCCH molecules was one of the main driving forces for the formation of the gel and thermotropic mesophases.
研究领域:
有机化学
·
材料科学
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2016
·
IF 3.782
Jin Han,Maowen Xu,Yubin Niu,Min Jia,Ting Liu,Chang Ming Li
A novel cubic KTi 2 (PO 4 ) 3 is successfully synthesized via a facile hydrothermal method combined with a subsequent annealing treatment and further used as electrode material for sodium-ion batteries for the first time. For comparison, carbon-coated KTi 2 (PO 4 ) 3 obtained by a normal cane sugar-assisted method reveals superior electrochemical performances in sodium-ion battery. Besides of the high coulombic efficiency of nearly 100% after 100 cycles, a stable capacity of 112 mA h g −1 can be achieved at 0.5 C after 100 cycles, and still maintains to 105 mA h g −1 after 500 cycles with capacity retention of approximately 90%.
研究领域:
材料科学
·
电化学
·
储能
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CHEMOSPHERE
·
2021
·
IF 7.086
LingYan Liu,ChunHong Zhang,ShuangRong Chen,Lan Ma,YingMei Li,YiFeng Lu
La(OH) 3 -modified canna biochar (CBC-La) was prepared by a coprecipitation method (dipping method), and its phosphate adsorption characteristics were investigated. The results show that the pseudo-second-order kinetics and the Langmuir model can be used to describe the adsorption process with a high level of accuracy. Adsorption equilibrium could be reached at 8 h, at which point the maximum adsorption capacity was shown to be 37.37 mg/g. CBC-La has excellent phosphate adsorption capacity in the middle to low concentrations (≤50 mg/L), and its removal rate can exceed 99 %. CBC-La also has wide pH adaptability (3–9) and a strongly selective adsorption performance. Notably, it can still maintain a removal rate of over 99.8 % in the presence of certain anions (NO 3 − , HCO 3 − , and CO 3 2− ), and the presence of NH 4 + has a synergistic effect on the adsorption process. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) measurements demonstrate that the main mechanisms of CBC-La phosphate adsorption are electrostatic adsorption, ion exchange, ligand exchange and inner sphere complexation.
研究领域:
环境科学
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材料科学
·
水处理
·
吸附技术
·
生物炭改性
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高影响因子
Frontiers in Microbiology
·
2022
·
IF 6.064
Olasunkanmi Oluwatayo Israel,Mageto James,Avala Ntsigouaye Juval,Yi Ming,Fei Yanru,Chen Yang,Chen Sijia,Xu Weizhen,Lin Lexun,Zhao Wenran,Wang Yan,Zhong Zhao-Hua
Coxsackievirus group B (CVB) is a member of the genus Enterovirus in the family Picornaviridae. CVB infection has been implicated as a major etiologic agent of viral myocarditis, dilated cardiomyopathy, meningitis, and pancreatitis among children and young adults. Until date, no antiviral agent has been licensed for the treatment of Coxsackievirus infection. In an effort to identify antiviral agents against diseases caused by the CVB, we found that ethyl 3-hydroxyhexanoate (EHX), a volatile compound present in fruits and food additives, is a potent antiviral compound. In this study, we demonstrated that EHX treatment significantly inhibits CVB replication both in vivo and in vitro. Furthermore, EHX possesses antiviral activity at 50% effective concentration (EC50) of 1.2 μM and 50% cytotoxicity (CC50) of 25.6 μM, yielding a selective index (SI) value as high as 20.8. Insights into the mechanism of antiviral activity of EHX showed that it acts at the step of viral RNA replication. Since EHX has received approval as food additives, treatment of CVB-related infections with EHX might be a safe therapeutic option and may be a promising strategy for the development of semi-synthetic antiviral drugs for viral diseases.
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JOURNAL OF CHEMICAL CRYSTALLOGRAPHY
·
2022
·Vol. 53
·期 1
·145-151
·
IF 0.582
Zhang Lirong,Qi Feiyan,Shele Muge,Namila E.,Qi Liming,Baiyin Menghe
One quaternary selenidoantimonate of [Mn(en) 3 ]CdSb 2 Se 5 ( 1 ) (en = ethylenediamine) was prepared under 1,2-propanediamine condition by mild solvothermal method. Single-crystal X-ray diffraction analysis reveals that compound 1 crystallizes in the monoclinic space group C 2/c. Its structure consists of infinite 1D [CdSb 2 Se 5 ] n 2n− anionic chains and [Mn(en) 3 ] 2+ cations. Meanwhile, “Z” shaped eight-membered [Cd 2 Sb 2 Se 4 ] and six-membered [CdSb 2 Se 3 ] rings are alternately found. As estimated from UV–Vis absorption spectrum, the band gap of 1 is 2.58 eV. Compound 1 also showed rapid response and excellent reproducibility based on photoelectric test. In addition, the magnetic and other properties of 1 were studied. Graphical Abstract The manuscript describes the synthesis, crystal structure, single-crystal X-ray diffraction, elemental analysis, photoelectric response, thermogravimetric analysis, magnetic properties, infrared spectroscopy and UV-Vis diffuse reflectance spectroscopy of [Mn(en) 3 ]CdSb 2 Se 5 . The photoelectric response of compound 1 was explored, and a highly repetitive and stable photocurrent curve was found, indicating that 1 is a typical p-type semiconductor. In addition, the magnetism of compound 1 was also studied, which showed that 1 had antiferromagnetic behavior.
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