NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 39
·15700-15705
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IF 3.069
Yan Lei,Limei Yu,Maochang Shen,Shikang Luo,Zhanxian Gao
A series of ionic liquids (ILs) were synthesized and their Hammett acidities (H0) were determined using 4-nitroaniline as the indicator. The relationship among IL's structure, the acid strength, and the catalytic performance in the condensation reaction of 9-fluorenone with phenol was discussed. The effective H0 range of ionic liquids that can catalyse the condensation reaction was obtained. Moreover, the catalysis of the mercapto compound co-catalyst was also systematically studied. According to the analysis of how the structure of the sulfydryl co-catalyst affects the percent conversion of 9-fluorenone and the selectivity of BHPF, a mechanism for the reaction in the IL–thiol cooperative catalytic system was proposed. The present work gave a clear clue to design novel IL catalysts for the synthesis of BHPF.
研究领域:
有机化学
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催化化学
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DOI
高影响因子
Advanced Energy Materials
·
2024
·Vol. 14
·期 26
·2401197
·
IF 24.4
Mingli Xu,Chen Wu,Lang Ye,Yuanteng Zhang,Chenyi Zhang,Jieming Hu,Ran Tan,Dong Gu,Xuanze Wang,Olivier Fontaine,Chun Zhan,Lin Zhuang,Xinping Ai,Jiangfeng Qian
Degraded LiCoO 2 cathode from retired Li-ion batteries is urgently required to be recycled in a greener way for economic and environmental considerations. The coarse metallurgy technologies for Li/Co extraction with massive CO 2 emission and energy consumption cannot satisfy the requirements of carbon neutralization. Herein, it is proposed that direct regeneration of degraded LiCoO 2 cathode could be realized via 9-fluorenone-mediated Li supplementation and follow-up structural restoration. The 9-fluorenone-lithium reagent is elaborately selected to compensate for the missing Li + into lattice with targeted stoichiometry owing to its compatible redox potential of 1.95 V versus Li + /Li, which is located just between the reversible intercalation (3.8 V) and irreversible conversion (1.2 V) potentials of LiCoO 2 electrode. Then, thermal energy-driven structure reorganization enables Li/Co atoms to occupy the right sites, accomplishing desirable structure healing within a short annealing time of 4 h. The regenerated LiCoO 2 cathode exhibits comparable Li-storage capability to commercial LiCoO 2 , benefiting from the non-destructive direct regeneration technology. In addition, the regeneration route is regarded as environmentally (0.13 kg CO 2 kg −1 cell) and economically (10.07 $ kg −1 cell) superior to conventional recycling routes based on life-cycle analysis. The precise surgery on spent LiCoO 2 cathode provides a promising solution for the forthcoming retirement rush of Li-ion batteries.
研究领域:
材料科学
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环境科学
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能源工程
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2024
·
IF 5.3
Lei Tian,Mengni Pan,Cuiping Ye,Hongbo Hao,Wenying Li
Phenanthrene (Phe) and fluorene (Flu) are crucial chemical intermediates with applications in materials, medicine, and pesticides. However, conventional separation methods struggle to effectively isolate phenanthrene from fluorene due to their similar physical properties. To address this challenge, a reaction–separation coupling technique was employed to convert fluorene into 9-fluorenone (9-Fluo), followed by the separation of phenanthrene from 9-fluorenone using solvent-cooling crystallization. Initially, the relative solubilities of phenanthrene and 9-fluorenone in 2072 solvents were calculated using COSMO-RS for preliminary screening. Among various conventional short-chain aliphatic alcohols and low-carbon saturated hydrocarbons, methanol, and cyclohexane were identified as the most effective solvents based on their solubility selectivity (SS). The molecular interactions between phenanthrene or 9-fluorenone and these solvents were analyzed using theoretical methods such as σ-potential/profile, infinite dilution activity coefficients in COSMO-RS, and Hansen solubility parameters, with further confirmation from FTIR tests. The optimal liquid–solid ratios were determined using both phase diagram measurements and solubility calculations. The reaction conversion of fluorene to 9-fluorenone was complete regardless of the raw material used. Phenanthrene and 9-fluorenone were effectively separated using methanol and cyclohexane with optimum liquid–solid mass ratios of 1.6:1 and 2.8:1, respectively. In the model mixture, the contents of phenanthrene and 9-fluorenone exceeded 98 wt%, with yields above 91 wt%. For anthracene residue, the content of 9-fluorenone reached 93.98 wt% with a yield of 84.52 wt%, while its content was only 76.58 wt% due to the accumulation of other components in phenanthrene.
研究领域:
化学工程
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材料科学
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2022
·
IF 3.119
Yanjuan Peng,Ziteng Wang,Wenhao Jiao,Xinxin Cheng,Jingjing Yang,Yonghong Hu,Li Mi
This article deals with the saturated solubility and solvation behavior of 2-bromo-9-fluorenone in 10 industrial common solvents and three binary mixed solvents by means of experimental and mathematical correlations. Solubility experiments were investigated using the static equilibrium method combined with high-performance liquid chromatography (HPLC) from 278.15 to 323.15 K at atmospheric pressure. The results showed that the maximum and minimum solubility of 2-bromo-9-fluorenone was 0.0526 (mole fraction) in 1,4-dioxane at 323.15 K and 0.0002 (mole fraction) in methanol at 278.15 K, respectively, and the solubility increased with the increase in temperature in all solvents. Furthermore, the solubility data of 2-bromo-9-fluorenone was analyzed using the Apelblat model, the Buchowski–Ksiazaczak λh model in pure solvents, CNIBS/R-K model, and the Jouyban–Acree model in binary solvent mixtures. By error comparison, the Apelblat model and the CNIBS/R-K model can better predict the solubility of 2-bromo-9-fluorenone. In addition, the solvation behavior was illustrated by the KAT-LSER model in pure solvents, and the result shows that the cohesive energy density in the solution is the main factor affecting 2-bromo-9-fluorenone. Therefore, the solubility data is very important for optimizing the extraction process and recrystallizing 2-bromo-9-fluorenone to obtain a higher yield in industry production.
研究领域:
化学工程
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物理化学
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DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
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2025
·
IF 5.5
Meng Li,Yu-Na Jiang,Zheng Li,Zhaobo Liu,Zehua Chen,Yufei Mao,Kang Yuan,Jiting Cui,Haiming Zhu,Shu Xing,Ming Wang,Bing Wang
Comprehensive Summary Aromatic ketones, such as 9-fluorenone (9-FO), are known for their high intersystem crossing quantum yields ( Φ ISC ≈ 1), rendering them highly valuable for photochemical reactions and dye-sensitized solar cells. However, their use as photosensitizers in biological contexts has been hindered by their low extinction coefficients, high excitation energies, and weak fluorescence. To address these limitations, we conjugated 9-FO with a fused-ring electron donor, resulting in an acceptor-donor-acceptor derivative IDT-9F. This strategy has successfully redshifted the absorption peak of 9-FO (380 nm) into the visible light range (498 nm) and significantly enhanced its light absorption capability (~310-fold) and fluorescence quantum yield (~100-fold). Furthermore, IDT-9F was encapsulated within pH-responsive nanoparticles using an acid-induced charge-reversal polymer as the amphiphilic matrix, and enabled fluorescence imaging-guided photodynamic inactivation of Gram-positive bacteria in acidic environment with a remarkable bacterial inhibition rate exceeding 99.9%.
研究领域:
光化学
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生物光子学
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纳米医学
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有机化学
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抗菌治疗
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Liwen Lv,Zhongai Hu,Ning An,Kefeng Xie,Yuying Yang,Ziyu Zhang,Zhimin Li
Here, we report an organic molecule electrode for more efficient energy storage, in which 2,7-Dihydroxy-9-fluorenone (DHFO) molecules are anchored on interconnected and highly conductive graphene sheets by non-covalent π–π interactions. The optimal DHFO/rGO composite can reach a high specific capacitance of 412.3 F g −1 at scan rate of 5 mV s −1 in 1 mol L −1 H 2 SO 4 aqueous electrolyte with a satisfactory capacitive retention of 91% after 10,000 consecutive constant galvanostatic charge-discharge at current density of 5 A g −1 . And it is worth noting that the Faraday current response peaks occurs within the positive potential range around 0.75 V, which is more suitable for positive electrode materials of supercapacitors with high performances. Additionally, charge storage mechanism and binding interactions of DHFO on graphene was evaluated based on the density functional theory (DFT) calculations. To match with the consequent positive electrode, AQ functionalized graphene (AQ/rGO) was prepared as negative electrode. Benefiting from the companionable match of two electrodes in structure, charge quantity and kinetics, the as-assembled asymmetrical supercapacitor (DHFO/rGO//AQ/rGO) delivers a maximum energy density of 28.57 Wh kg −1 along with 0.62 kW kg −1 , and excellent cycle stability (82.3% specific capacitance retention after 10,000 cycling at 5 A g −1 ). Two tandem DHFO/rGO//AQ/rGO devices could light 45 LEDs.
研究领域:
材料科学
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能源技术
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化学工程
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DOI
高影响因子
FOOD AND CHEMICAL TOXICOLOGY
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2023
·
IF 4.3
Qiwen Feng,Yumeng Liu,Liping Zou,Mengying Lei,Changhong Zhu,Wei Xia
Fluorene-9-bisphenol (BHPF) is an emerging global endocrine-disrupting chemical found in numerous household products as a substitute of bisphenol A. Many studies have reported various toxicities associated with BHPF. However, the effect of BHPF on male reproduction, particularly on the structural integrity of the blood testis barrier (BTB) in mice, has not yet been extensively studied. Ferroptosis , a newly identified form of cell death, occurs in the testicular tissue following exposure to BPA, affecting male fertility. We investigated whether ferroptosis plays a role in BHPF-induced testicular damage. The findings indicated that BHPF exposure led decreases in serum testosterone (T) concentration and sperm concentration and motility in mice. Furthermore, BHPF disrupted the BTB by interfering with key BTB-related proteins, including Cx43, β-catenin, and ZO-1. Moreover, BHPF induced ferroptosis through the induction of lipid peroxidation, iron overload, oxidative stress , and mitochondrial dysfunction in the testicular tissue. Inhibition of ferroptosis using Fer-1 mitigated the BHPF-induced damage to the BTB and ferroptosis in TM4 cells. Overall, our findings indicated the detrimental effects of BHPF on male reproductive function in mice, suggesting ferroptosis as a mechanism underlying testicular damage.
研究领域:
毒理学
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生殖生物学
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内分泌学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2025
·
IF 8.2
Jiawang Fu,Yang Yang,Qiuchen Du,Bailing Liu,Huiying Sun,Bo Hu,Zhongmin Su
This study presents an interface engineering strategy for the fabrication of high-performance proton exchange membranes. The strategy utilizes isatin-derived polymer (PIB)-anchored Keggin-type phosphotungstic acid (H3PW12O40, abbreviated as PW) as functional fillers, which are integrated into a sulfonated polyaryletherketone (named as SPAEK) matrix to synergistically enhance the overall performance of the resulting membrane (denoted as PISm/PW-x, where m represents the mass ratio of PIB to SPAEK and x represents the mass fraction of PW in the hybrid matrix). The poly(1,2-diphenylethane)-isatin (named as PIB), synthesized via superacid catalysis, forms a strong ionic cross-linking (−NH···-SO3H) with SPAEK, achieving outstanding mechanical strength (46.1 MPa) and dimensional stability (6.25% swelling ratio at 80 °C), while the uniformly dispersed PW clusters act as bridges to construct a continuous hydrogen-bonding network, enhancing the proton conductivity (0.192 S cm–1 at 80 °C) by 2.15 times compared to the pristine membrane in water solution. The optimized PIS1/PW-8 membrane demonstrates exceptional overall performance, characterized by ultra-restricted methanol permeability (1.82 × 10–8 cm2 s–1), superior oxidative stability (99.4% weight retention in Fenton’s test), and outstanding operational durability (sustained conductivity over 100 h at 80 °C). This performance is attributed to a well-defined microphase-separated morphology featuring approximately 2.0–3.0 nm hydrophilic domains and highly efficient proton hopping pathways. This molecular-level engineering of organic–inorganic interfaces offers a paradigm for advanced fuel cell membranes, simultaneously addressing the long-standing trade-off between conductivity and mechanical stability in polyelectrolyte materials.
研究领域:
材料科学
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高分子化学
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能源材料
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燃料电池技术
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纳米复合材料
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DOI
PubMed
高影响因子
POLYMER
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2025
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IF 4.5
Junji Wei,Zeyue Zhang,Zexing Zhang,Runlin Lu,Jinbiao Pang,Shifeng Yuan,Liang Fang,Li Duan,Jian Liu
For decades, high-performance epoxy resins have been pivotal in advancing high-temperature electronic materials. Conventional epoxy resins tend to soften and deform under high-temperature conditions, which compromises their structural stability and fails to meet the stringent thermal reliability requirements of high-temperature processes and equipment. Regarding this, this study presented two new kinds of fluorene-based epoxy monomers bisphenol fluorene epoxy resin (BFEP), isopropyl bisphenol fluorene epoxy resin (IBFEP) and a novel curing agent (1,3-bis(4-aminophenyl) adamantane, AMA) derived from adamantane. The two monomers were cured with two hardeners, 4,4-diaminodiphenyl sulfone (DDS) and AMA, respectively. The DDS cured resins showed high glass transition temperature (BFEP/DDS, 236 °C; IBFEP/DDS, 209 °C), excellent storage modulus, good thermal stability ( T d5% >395 °C) and dimensional stability, low water absorption and good adhesion. However, the dielectric constant (κ) of those two resins were relatively high, e.g. 4.6 was for BFEP/DDS, 4.23 was for IBFEP/DDS at 10 MHz. Compared with DDS system, both resins exhibited a lower glass transition temperature ( T g ) after cured by AMA. However, the latters also possessed a notably high storage modulus at room temperature (RT) (BFEP/AMA, 4420 MPa; IBFEP/AMA, 4630 MPa), lower dielectric constant (BFEP/AMA, 4.05; IBFEP/AMA, 3.74 at 10 MHz), better adhesion and thermal conductivity. In summary, the two kinds of fluorene-based epoxy resins cured with different curing agents exhibited different performance characteristics. The performance of AMA cured epoxy resin exhibited more balanced behaviors due to its excellent rigid and hollow structure, which could be suitable for high- T g PCB substrate materials.
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高影响因子
FOOD CHEMISTRY
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2025
·
IF 9.8
Qidong Yu,Yiding Li,Wenmin Zhang,Xueting Cui,Shiye Xie,Lan Zhang
Monitoring trace oxygenated polycyclic aromatic hydrocarbons (O-PAHs) in tea infusions is crucial, as long-term consumption of O-PAHs-contaminated tea can harm health. In this work, covalent organic framework (COF) TpBD-(OH) 2 coating was fabricated for solid-phase microextraction (SPME) of O-PAHs. The coating contains abundant benzene rings and hydrogen bonding sites (oxygen and nitrogen groups). Density functional theory calculations, electrostatic potential distribution and X-ray photoelectron spectroscopy analysis indicated the COF efficiently adsorbs O-PAHs via van der Waals force, hydrogen bonding, electrostatic force, size matching, and π-π interaction. Under the best SPME conditions, a method for detecting O-PAHs in tea infusions was developed using gas chromatography-tandem mass spectrometry (GC–MS/MS). The method possessed low limit of detection (0.5–1.0 ng L −1 ), wide linearity (2.0–1000.0 ng L −1 ) and satisfactory recoveries (82.5 %–117.5 %). Furthermore, the method was used to study the impacts of different roasting methods on O-PAHs contamination, and results showed carbon roasting posed a higher risk.
研究领域:
分析化学
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食品安全
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环境科学
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DOI
PubMed
高影响因子
Journal of the Mechanical Behavior of Biomedical Materials
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2025
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IF 3.5
Yinan Sun,Lihua Hong,Lin Sun,Chengji Zhao
In dentistry, the use of bisphenol A glycidyl methacrylate (Bis-GMA) is being questioned since bisphenol A is regarded as an endocrine disruptor. As alternative candidates to Bis-GMA, bio-based dental resins face the crucial challenge of low mechanical strength and high water sorption. In this study, a novel guaiacol-based dimethacrylate containing fluorenyl cardo-structure was developed to effectively improve the hydrophobicity, enhance the mechanical properties, and reduce the polymerization shrinkage of bio-based dental restorative resins. Therefore, 9, 9-bis(3-methoxy-4-glycerolate methacrylate)fluorene (BMHF-GMA) was synthesized from a new guaiacol-based bisphenol, 9, 9-bis(3-methoxy-4-phenol)fluorene (BMHF), which is a lower estrogenic activity bisphenol monomer than commercial bisphenols from the results of cell proliferation test. The experimental dental resin (5 MHMA5T) was prepared containing BMHF-GMA and triethylene glycol dimethacrylate in a 1:1 ratio. The control group (5B5T) replaced BMHF-GMA completely with Bis-GMA. Evaluation of both dental resins revealed that 5 MHMA5T possessed comparable double bond conversion (>50 % in 20 s), better volumetric polymerization shrinkage (7.19 ± 0.09 %), shrinkage stress (0.92 ± 0.01 MPa in 1200 s), water sorption (39.9 ± 0.52 μg mm −3 ), water solubility (0.99 ± 0.04 μg mm −3 ) and lower cytotoxicity compared with 5B5T. 5 MHMA5T had superior mechanical properties (flexural strength: 122.30 ± 5.00 MPa; flexural modulus: 3.49 ± 0.02 GPa; Vickers hardness number: 25.21 ± 0.56 HV). Especially, after water immersion, it still maintained adequate mechanical properties (flexural strength: 97.34 ± 5.00 MPa; flexural modulus: 2.92 ± 0.02 GPa; Vickers hardness number: 19.33 ± 0.61 HV). Therefore, the new dimethacrylate BMHF-GMA shows great potential in complex and wet oral environments and offers a promising alternative to Bis-GMA in dental restorative resins.
研究领域:
牙科学
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材料科学
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生物医学工程
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PubMed
高影响因子
Chemistry-An Asian Journal
·
2019
·Vol. 14
·期 19
·3350-3356
·
IF 3.698
Dongkun Yu,Hongyu Mou,Xinhui Zhao,Yaqing Wang,Tiancheng Mu
Graphical Eutectic molecular liquids based on hydrogen bonding and π–π interaction were formed and used for exfoliating two-dimensional materials and recycling polymers. Eutectic molecular liquids (EMLs) based on hydrogen-bonding interaction and π–π stacking were prepared. We found that the thermodynamic properties like initial decomposition temperature and glass transition temperature of EMLs are mainly dominated by the hydrogen bond donor, which is beneficial for designing and preparing new EMLs. These new liquid systems could be applied in the field of environmental and material science.
研究领域:
材料科学
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环境科学
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化学
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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）