NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 16
·7908-7914
·
IF 3.269
Hengchang Ma,Haiying Cao,Lei Lei,Zengming Yang,Manyi Yang,Yanfang Qin,Yucheng Ma,Xiaolin Guan,Dedai Lu,Ziqiang Lei
The effective polymerization process is very desirable in the field of macromolecule science. In this study, we present a facile synthetic method via aldol addition and condensation (AAC) that leads to the formation of fluorescent linear and branched polymers by cross coupling triphenylamines (TPA) and cyclohexanones (CYC) via CC bond formation. The methodology has the advantage of easy operations, mild reaction conditions, and high yield. Via the analysis of NMR, FT-IR, GPC, PL, UV, SEM, and theoretical calculation, the structure, physical properties, and optical behaviors of both polymers were well-characterized. The understanding of cell transplantation, migration, division, fusion, and lysis is a very challenging task. In this study, the linear polymer (LP) exhibits excellent biocompatibility and low cytotoxicity, which can be readily internalized by living cells in a noninvasive manner. The images of MPC5 cells indicate that LP can be a promising emissive fluorescence probe for bioimaging application.
研究领域:
高分子科学
·
生物学
·
医学
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产品关联
DOI
高影响因子
FLUID PHASE EQUILIBRIA
·
2016
·
IF 1.846
Xiaoxiao Sheng,Qinbo Wang,Zhenhua Xiong,Chuxiong Chen
The solubilities of adipic acid in cyclohexanone + cyclohexanol mixtures at (303.15–349.45) K, in cyclohexane + cyclohexanol mixtures at (304.15–339.45) K, and in cyclohexane + cyclohexanone mixtures at (304.85–342.45) K were determined at atmospheric pressure by the dynamic method. Experimental results show that when solvent composition remains constant, solubilities of adipic acid in the studied binary mixed solvents increase monotonically with temperature increasing, and when temperature remains constant, solubilities of adipic acid decrease monotonically with the increasing mass fraction of cyclohexane in cyclohexane + cyclohexanol and cyclohexane + cyclohexanone mixture. However, the measured solubility firstly increases monotonically with the increasing mass fraction of cyclohexanone in cyclohexanone + cyclohexanol mixtures and then reaches the maximum solubility at the mass fraction of cyclohexanone at 0.4. When the mass fraction of cyclohexanone was bigger than 0.40, the solubility of adipic acid decreased with the increasing mass fraction of cyclohexanone. There exists a maximum-solubility effect. Further, both the NRTL equation and the Apelblat equation were used to correlate the experimentally determined solubilities. A fairly good agreement was obtained between the correlated solubilities with the experimental observations. Thermodynamic quantities of dissolution were calculated by the Clark and Glew equation, including dissolution enthalpy, entropy, Gibbs energy and isobaric heat capacity for adicip acid in cyclohexane + cyclohexanol, cyclohexane + cyclohexanone, and cyclohexanone + cyclohexanol solvent mixtures .
研究领域:
化学工程
·
热力学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Weibin Cai,Tiankun Liu,Hong Ye,Meng Chen,Xue Cheng
The ternary liquid–liquid equilibrium (LLE) data for cyclohexanone (CYC) + phenol + water were determined at T = (298.15, 313.15, and 323.15) K and atmospheric pressure. The distribution coefficients and separation factors were determined by the measured tie-line data, which showed the excellent performance of CYC in the extraction of phenol from aqueous solution. The reliability of LLE data was ascertained by the Bachman and Hand equations. The experimental data of the investigated ternary system were accurately correlated by the nonrandom two-liquid (NRTL) model and the universal quasi-chemical (UNIQUAC) model, and the relevant binary interaction parameters were calculated. For the NRTL and UNIQUAC models, the root-mean-square deviation values were lower than 0.6%.
研究领域:
化学工程
·
物理化学
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产品关联
DOI
高影响因子
FLUID PHASE EQUILIBRIA
·
2015
·
IF 2.2
Yinchuan Pei,Qinbo Wang,Xing Gong,Fuqiong Lei,Binwei Shen
Liquid–liquid equilibrium (LLE) data for ternary systems water + cyclohexane + cyclohexanol and water + cyclohexane + cyclohexanone were measured at (303.2–333.2) K and under atmospheric pressure. The reliability of the experimental tie-line data was checked by the empirical Othmer–Tobias correlation. The distribution coefficient and separation factor were used to investigate the distribution of cyclohexanol and cyclohexanone between water and cyclohexane. The results show that the distribution coefficient of cyclohexanol or cyclohexanone between organic and aqueous phases increases with the increasing content of cyclohexanol or cyclohexanone in water, and so does it with the increasing of temperature. By using the NRTL and UNIQUAC activity coefficient models, the experimentally determined LLE data, along with the LLE data for another ternary system water + cyclohexanol + cyclohexanone [G. Xing, W. Qinbo, L. Fuqiong, S. Binwei, J. Chem. Eng. Data 59 (2013) 1651–1655], were correlated simultaneously. Good agreements were obtained between the correlated and experimentally determined tie-line data. The binary NRTL and UNIQUAC interaction parameters were obtained. Furthermore, four sets of quaternary LLE data for water + cyclohexane + cyclohexanol + cyclohexanone were experimentally determined at 318.2 K. The experimentally determined quaternary LLE data were compared with the NRTL model predicted LLE data, and generally agreements were obtained. It further verifies the reliability of the obtained binary model parameters, and indicates the obtained parameters could be used for prediction, as well as design and optimization of the related separation process.
研究领域:
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2016
·
IF 1.835
Xiaoxiao Sheng,Qinbo Wang,Linhui Chen,Zhipeng Shen,Yinchuan Pei
The solubilities of glutaric acid in binary cyclohexane + cyclohexanol solvent mixtures at 298.05–343.65 K, in binary cyclohexane + cyclohexanone solvent mixtures at 299.10–340.65 K, in binary cyclohexanone + cyclohexanol solvent mixtures at 299.75–343.65 K, and in ternary cyclohexanol + cyclohexanone + cyclohexane solvent mixtures at 298.15–330.95 K were studied by the dynamic method. The results show that the solubility of glutaric acid increases as temperature increases at constant solvent composition in three determined binary solvent systems. For binary cyclohexane + cyclohexanol and cyclohexane + cyclohexanone solvent mixtures, solubilities of glutaric acid decrease monotonically with the increasing mass fraction of cyclohexane in solvent mixtures at constant temperature. However, for binary cyclohexanone + cyclohexanol solvent mixtures, cyclohexanone with a mass fraction at 0.6 in solvent mixtures has the best dissolving capacity for glutaric acid at constant temperature. The experimental solubility data of three determined binary solvent systems were correlated by the Apelblat equation and nonrandom two-liquid (NRTL) activity coefficient model, and the correlated solubilities data were in good accord with the experimental data. The obtained binary interaction parameters for the NRTL model were used to calculate the solubilities of glutaric acid in the ternary cyclohexanol + cyclohexanone + cyclohexane solvent mixtures, which were compared with the experimental solubilities data.
研究领域:
化学工程
·
物理化学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2017
·
IF 2.323
Xiangji Liao,Xiuqing Li,Yujun Han,Jun Song,Yingjie Gao,Ao Yang,Yan Zhu,Weiping Luo
In this work, the solubilities of adipic acid and succinic acid in glutaric acid + cyclohexanone and glutaric acid + acetic acid mixtures were measured respectively by using the laser dynamic method under atmospheric pressure, in which the temperature ranged from 296.15 to 340.85 K and the mass fraction of glutaric acid in the binary solvent mixtures ranged from 0.00 to 0.30. The effects of glutaric acid on solubility of adipic acid and succinic acid have been discussed. It is found that the effects of glutaric acid on the solubility of adipic acid and succinic acid were negative and that with the increasing mass fraction of glutaric acid in the mixtures the solubilities of adipic acid and succinic acid would decrease. With the gradual increase of temperature, the measured solubility of adipic acid and succinic acid in glutaric acid + cyclohexanone and glutaric acid + acetic acid mixtures would increase at the constant proportion of solvent mixtures. Then the experimental data were well-correlated by the modified Apelblat equation and the modified nonrandom two-liquid (NRTL) activity coefficient models, in which the average relative deviation (ARD) were less than 2.50%, and the values of the solubility calculated showed good agreement with the experimental observation. The interaction parameters of AA and GA and SA and GA were determined first in this work.
研究领域:
化学工程
·
物理化学
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产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2022
·Vol. 6
·期 6
·1616-1624
·
IF 6.813
Haofei Gao,Fengan Han,Guangyi Li,Aiqin Wang,Yu Cong,Zhizhou Li,Wei Wang,Ning Li
In this work, jet fuel range high-density polycycloalkanes, dicyclohexylmethane and dodecahydrofluorene, were first synthesized by a two-step method with vanillin and cyclohexanone, two platform compounds that can be derived from lignin. In the first step, 2-(4-hydroxy-3-methoxybenzylidene)cyclohexan-1-one, a jet fuel range C13 polycycloalkane precursor, was obtained through an acid-catalyzed aldol condensation reaction between vanillin and cyclohexanone over a series of titanium dioxide based nanometer material catalysts. Among them, sulfated titania nanofibers (STNFs) exhibited the highest activity. Over them, a high yield (81%) of 2-(4-hydroxy-3-methoxybenzylidene)cyclohexan-1-one was obtained after the reaction was carried out at 423 K for 10 h. On the basis of the characterization results, the good performance of the STNF catalyst can be attributed to its higher acid strength and higher Brønsted to Lewis acid site ratio. Subsequently, the aldol condensation product was further converted to a mixture of dicyclohexylmethane and dodecahydrofluorene by hydrodeoxygenation (HDO) under the co-catalysis of Pd/C and H-Y zeolite. According to our measurement, the cycloalkane mixture as obtained from the HDO process has a higher density (0.95 g mL−1) and lower freezing point (256 K). As a potential application, it can be blended into low freezing point jet fuels to improve their volumetric heat values.
研究领域:
化学工程
·
能源科学
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产品关联
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2022
·Vol. 233
·期 9
·1-13
·
IF 2.984
Wu Wei,Duan Huike,Chen Jiabin,Xu Jie,Xu Fen,Huang Tianyin,Xu Xiaoyi
In this study, the azo dye acid orange 7 (AO7) was degraded by synergistic activation of persulfate (PMS) with cyclohexanone/chloride ion (Cl − ). The effects of cyclohexanone dosage, PMS concentration, Cl − concentration, initial pH, temperature, and aqueous natural organic matter (NOM) on the AO7 removal were investigated. Under alkaline conditions, the removal rate of AO7 increased with increasing cyclohexanone and Cl − concentrations. The degradation rate of AO7 was unaffected by the water matrix and NOM in the environment. As shown in radical quenching experiments and electron paramagnetic resonance spectroscopy analysis, the main reactive species generated in the reaction system were hypochlorous acid (HCIO) and singlet oxygen ( l O 2 ), which destroyed the azo bond and naphthalene ring structure in AO7. Judging from its ability to degrade AO7, the cyclohexanone/Cl − /PMS system is suitable for treating high-salt wastewater containing organic pollutants.
研究领域:
环境科学
·
化学
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DOI
高影响因子
CATALYSIS LETTERS
·
2023
·Vol. 153
·期 10
·3044-3052
·
IF 2.8
Li Kaihui,Xu Junyuan,Zhang Huan,Zhu Lihua
Abstract Cyclohexanone is a crucial intermediate for producing nylon and other industrial products. However, the direct hydrogenation of phenol for synthesizing cyclohexanone easily generates cyclohexanol and thus reduce the yield. In this work, the Pd/WO 3 catalysts with different Pd contents (Pd/WO 3 -1–0.21 wt%, Pd/WO 3 -2–0.69 wt%, Pd/WO 3 -3–2.20 wt%) are prepared via using sodium borohydride liquid phase reduction, which have good catalytic performance for phenol selective hydrogenation. The Pd/WO 3 -2 catalyst can achieve 92.9% conversion, 84.4% selectivity and high TOF (turnover frequency) of 349.1 h −1 under the reaction conditions (120 °C, 2 h, 3.0 MPa H 2 ). The nanostructures of the catalysts are extensively characterized by XRD, XPS, SEM, TEM, HRTEM, STEM and STEM-EDS elemental mapping and line-scanning. It is found that the Pd/WO 3 -2 catalyst has a high Pd dispersion and quite tiny Pd clusters. Alternatively, the stability experiment of Pd/WO 3 -2 indicates that the conversion decreases from 92.9% to 87.5% and the selectivity to cyclohexanone does not change significantly (84%) after it is recycled for five times. Graphic Abstract
研究领域:
催化化学
·
材料科学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Chunhua Zhang,Zhengyan Qu,Hong Jiang,Rizhi Chen,Weihong Xing
Phenol hydrogenation is a green route to prepare cyclohexanone, an intermediate for the production of nylon 66 and nylon 6. The development of high-performance catalysts still keeps a great challenge. Herein, the activated carbon (AC) was modified with an acidic material Nb 2 O 5 to adjust the microstructure and surface properties of AC, and the influences of the calcination temperature and Nb 2 O 5 content on the catalytic performance of the Pd/AC-Nb 2 O 5 catalysts for the phenol hydrogenation to cyclohexanone were investigated. The Nb 2 O 5 with proper content can be highly uniformly distributed on the AC surface, enhancing the acidity of the Pd/AC-Nb 2 O 5 catalysts with comparable specific surface area and Pd dispersion, thereby improving the catalytic activity. The hybrid Pd/AC-10Nb 2 O 5 -500 catalyst exhibits the synergistic effect between the Pd nanoparticles and AC-10Nb 2 O 5 , which enhances the catalytic activity for the hydrogenation of phenol. Furthermore, the as-prepared Pd/AC-10Nb 2 O 5 -500 catalyst shows good reusability during 7 reaction cycles.
研究领域:
化学工程
·
催化材料
✓ 已验证
DOI
高影响因子
Royal Society Open Science
·
2020
·Vol. 7
·期 10
·
IF 2.646
Xiujing Peng,Shah Zeb,Jianguo Zhao,Miaomiao Zhang,Yu Cui,Guoxin Sun
HRF5015, a perfluorosulfonic acid resin catalyst with unique pore structures, was investigated in the catalytic self-condensation of cyclohexanone under mild conditions. The morphology of HRF5015 was characterized by transmission electron microscopy (TEM) and atomic force microscope (AFM), and the reaction mechanism was studied by in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The effects of reaction time and temperature on the yield of dimer were investigated under the nitrogen atmosphere. The results show that the reaction temperature is low, and especially, the selectivity of the dimer is close to 100%. The apparent activation energy for the dimer formation reaction is 54 kJ mol−1. Synergistic action of cluster structure formed by sulfonic groups and nanopores in HRF5015 may be the key factor of high-efficiency catalytic activity and high selectivity. In situ infrared spectra indicate that the intermediate is stable in the reaction process. HRF5015 is environmentally friendly and re-usable, which shows good potential in a future application.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2021
·
IF 3.178
Hongyue Guo,Hui Li,Wei Wang,Bing Li,Qingsong Li
To separate and purify cyclohexanone from water, in 101.3 kPa, 298.2, 303.2 and 313.2 K, the liquid–liquid equilibrium (LLE) data of the ternary mixture of water + cyclohexanone (CYC) + mesityl oxide were presented. The distribution coefficient (D) and separation factor (S) appraised the utility of extracting cyclohexanone from water. The NRTL and UNIQUAC models successfully correlated the experimental data with RMSD less than 0.29%. The GUI-MATLAB tool was used to verify the good reliability of the regression parameters.
研究领域:
化学工程
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）