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Functionalized metal-organic frameworks with strong acidity and hydrophobicity as an efficient catalyst for the production of 5-hydroxymethylfurfural

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Chinese Journal of Chemical Engineering 2021年第5期34卷 167-174页

作者： Huan Li yao zhong Luxi Wang Qiang Deng Jun Wang Zheling Zeng Xinxiang Cao Shuguang Deng Key Laboratory of Poyang Lake Environment and Resource Utilization(Nanchang University)of the Ministry of Education School of ResourceEnvironmental and ChemicalEngineeringNanchang UniversityNanchang 330031China Laboratory for Development&Application of Cold Plasma Technology College of Chemistry and Chemical EngineeringLuoyang Normal UniversityLuoyang 471022China School for Engineering of Matter Transport and EnergyArizona State University551 E.Tyler MallTempeAZ 85287United States

In the dehydration of fructose to 5-hydroxymethyl furfural(HMF),in situ produced water weakens the acid strength of the catalyst and causes the rehydration of HMF,causing unsatisfactory catalytic activity and *** this work,a class of benzenesulfonic acid-grafted metal-organic frameworks with strong acidity and hydrophobicity is obtained by the direct sulfonation method using 4-chlorobenzenesulfonic acid as sulfonating *** resultant MOFs have a specific surface area of greater than 250 m^(2)·g^(-1),acid density above 1.0 mmol·g^(-1),and water contact angle up to 129°.The hydrophobic MOF-PhSO_(3)H exhibits both higher catalytic activity and selectivity than MOF-SO_(3)H in the HMF synthesis due to its better hydrophobicity and ***,the catalyst has a high recycled *** last,fructose is completely converted,and 98.0%yield of HMF is obtained under 120℃ in a DMSO solvent *** successful preparation of the hydrophobic acidic MOF provides a novel hydrophobic catalyst for the synthesis of HMF.

关键词： Catalysis Catalyst Biomass Metal-organic framework Fructose 5-Hydroxymethylfurfural

Composition and structure of coatings on Ti-6Al-4V alloy by micro-plasma oxidation in NaAlO2 solution

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中国有色金属学会会刊：英文版 2004年第z1期14卷 162-165页

作者： yao zhong-ping JIANG Zhao-hua SUN Xue-tong WU Zheng-dong ZHANG Xue-lin Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China

Compound ceramic coatings on Ti-6Al-4V alloy were prepared for different time by pulsed bi-polar micro-plasma oxidation (MPO) in NaAlO2 solution. The phase composition was studied by XRD. And the electrochemical impedance spectra (EIS) of the coatings were measured to study the structure of the coatings, combined with the surface morphology. Using the proper EIS interpreting software, the "equivalent circuit" of the coatings was established, and meanwhile fitting values of equivalent element were obtained. The results show that the coating is composed of Al2 TiO5, α-Al2O3 and rutile TiO2, of which Al2 TiO5 is the main crystalline. Increasing the MPO time, the contents of Al2TiO5, rutile TiO2 and α-Al2O3 in the surface of the coating increase. And the EIS analysis and the surface morphology of the coatings illustrates the double-layer structure of the coatings, and the outer layer is loosen and the inner layer is compact. With the increase of the oxidizing time, the surface coarse degree of the coatings and the porosity of the outer layer of the coating are increased while the compactness of the inner layer of the coating is improved.

关键词： micro-plasma oxidation ceramic coatings electrochemical impedance spectra Ti-6Al-4V alloy

Thermo-oxidative degradation of Nylon 1010 films:Colorimetric evaluation and its correlation with material properties

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Chinese Chemical Letters 2017年第5期28卷 949-954页

作者： Li-Hai Cai Zhi-Guo Qi Jun Xu Bao-Hua Guo zhong-yao Huang Key Laboratory of Advanced Materials of Ministry of Education Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Institute of Petroleum Logistical Support DepartmentCMCBeijing 102300China

The thermo-oxidative aging behaviors of Nylon 1010 films were studied by various analytical methods,such as measuring the chromaticity,relative viscosity,carbonyl index,UV absorbance at 280 nm and elongation at break of the aged *** thermo-oxidative aging plots of the results obtained via these various methods at different temperatures are subjected to the time-temperature superposition analysis,which are found to be well *** b＊ values are used as X axis and the other results,i.e.,relative viscosity,carbonyl index,UV absorbance at 280 nm and elongation at break,are used as V axis,*** relationship between the b values and the other results is obtained,from which we can derive the changes of physical and chemical properties at different b＊ *** the b＊ values can be quickly determined by using a portable spectrophotometer,the on-line evaluation of the thermo-oxidative aging of Nylon 1010 can be realized.

关键词： Nylon 1010 Colorimetric evaluation Thermo-oxidative degradation Carbonyl index UV absorbance Elongation at break Activation energy

Synthesis of Tetra-Schiff Base Macrocyclic Compound Containing Benzo-12-crown-4

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Chinese Chemical Letters 2002年第6期13卷 513-514页

作者： Bin SUN Jun Ru CHEN Hua CHEN yao zhong LI Xian Jun LI Department of Chemistry Sichuan UniversityChengdu 610064

Tetra-Schiff base macrocyclic compound containing benzo-12-crown-4 was synthesized via condensation of 2, 6-diformyl-4-methyl-phenol with 4, 5- diaminobenzo-12C- 4 promoted by proton. The compound was characterized b... 详细信息

关键词： Schiff base crown macrocyclic compound

Strong Superadditive Deficit of Coherence and Quantum Correlations Distribution

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Chinese Physics Letters 2019年第8期36卷 14-18页

作者： Si-Yuan Liu Feng-Lin Wu yao-zhong Zhang Heng Fan Institute of Physics Chinese Academy of SciencesBeijing100190 Institute of Modern Physics Northwest UniversityXi’an710127 Shaanxi Key Laboratory for Theoretical Physics Frontiers Xi’an710127 School of Mathematics and Physics The University of QueenslandBrisbane4072Australia

The definitions of strong superadditive deficit for relative entropy coherence and monogamy deficit of measurement-dependent global quantum discord are *** equivalence between them is proved,which provides a useful criterion for the validity of the strong superadditive inequality of relative entropy *** addition,the strong superadditive deficit of *** entropy coherence is proved to be greater than or equal to zero under the condition that bipartite measurement-dependent global quantum discord(GQD)does not increase under the discarding of *** the Monte Carlo method,it is shown that both the strong superadditive inequality of relative entropy coherence and the monogamy inequality of measurement-dependent GQD are established under general *** bipartite measurement-dependent GQD does not increase under the discarding of *** multipartite situation is also discussed in detail.

关键词： Deficit Coherence Quantum

DNA cleavage promoted by diethylenetriaminepentaacetic acid (DTPA) derivatives

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Chinese Chemical Letters 2009年第9期20卷 1107-1110页

作者： zhong Wei yao Jun Xu Da Wei Zhang Hong Hui Lin Chuan Qin Xia College of Chemistry Sichuan University Chengdu 610064. China School of Life Science Sichuan University Chengdu 610064 China

DTPA and its two derivatives were synthesized and used as catalysts in DNA cleavage. Under physiological conditions, a series of experiments have been done. The effects of DNA cleavage with three ligands were studied under different concentrations, cleavage time, and pH values. The results strongly suggested that the plasrnid DNA （pUC 19） can be cleaved efficiently by CITC- DTPA. For the cleavage reaction catalyzed by CITC-DTPA, Form I DNA could convert to Form II mostly, and the DNA-cleavage mechanism involved an oxidative pathway. 2009 Chuan Qin Xia. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： TPA Derivatives DNA cleavage Cleavage mechanism

Novel fabrication of copper oxides on AC and its enhanced catalytic performance on oxidative carbonylation of methanol

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Chinese Chemical Letters 2017年第1期28卷 70-74页

作者： Ke Shi Shou-Ying Huang zhong-yao Zhang Sheng-Ping Wang Xin-Bin Ma Key Laboratory for Green Chemical Technology School of Chemical Engineering and Technology Tianjin University Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China

Copper oxides（CuOx） nanoparticles dispersed on activated carbon（AC） were prepared by using vaporphase methanol as the reducing agent. The CuOx/AC as prepared exhibited an enhanced catalytic activity in oxidative carbonylation of methanol to dimethyl carbonate（DMC）. The catalytic performance was significantly influenced by reduction conditions including temperature and time. With the similar selectivity of DMC, the space time yield（STY） under optimal reduction conditions reached up to 408 mg g^-1h^-1, which is superior to conventional methods such as thermolysis and solvothermal reduction. Based on the characterization results of XRD, TEM and XPS, the good copper dispersion and high Cu^＋ content obtained by vapor-phase methanol reduction were mainly responsible for the high catalytic activity.

关键词： Dimethyl carbonate Oxidative carbonylation Copper oxides Vapor-phase methanol reduction Activated carbon

Simulation of Potential Production and Optimum Population Quantitative Indices for the Second Hybrid Rice

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Agricultural Sciences in China 2006年第7期5卷 498-505页

作者： YAN Li-Jiao yao zhong ZHENG Zhi-ming LI Hua-bin Agro-Ecology Institute Life Science College Zhejiang University Hangzhou 310029 P.R.China

The article established the HDRICE model by modifying the structure of the ORYZA1 model and revising its parameters by field experiments. The HDRICE model consists of the modules of morphological development of rice, daily dry matter accumulation and partitioning, daily CO2 assimilation of the canopy, leaf area, and tiller development. The model preferably simulated the dynamic rice development because of the thorough integration of the effects of temperature and light on the rates of rice development, photosynthesis, respiration, and. other ecophysiological processes. In addition, this model has attainable grain yield in the test experiment that showed the potential yield of cultivar Xieyou 46 ranged from 11 to 13 tons ha-~. Besides, the model was used to optimize the combinations of the transplanting date, seedling age and density for cultivar Xieyou 46 at Jinhua area, and the population quantitative indices to attain the potential yield such as maximum stems, effective panicles, filled grain number/leaf area, and so on. The result showed that the combination of transplanting date on July 25, seedling age of 35 days and base seedling density of 1.33 x 106ha-1 is the optimum combination for the second hybrid rice production in Jinhua County, China. And the maximum stems, the effective panicles, the filled grain per panicle, the peak of optimum LAI, LAI in later filling stage, and the filled grain number/leaf were 6.03×10^6ha, 3.99×10^6ha, 119.2, 8.59, 5-6, and 0.64, respectively.

关键词： simulation model potential production optimum population quantitative indices second hybrid rice

STUDIES ON SYNTHESIS AND PROPERTIES OF NEW TETRATHIFULVALENE DERIVATIVES

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Chinese Chemical Letters 1996年第7期7卷 597-599页

作者： Hong Qi LI zhong Qi yao Lanzhou Institute of Chemical Physics.Chinese Academy of Sciences Lanzhou730000

Synthesis of three new tetrathiafulvalene(TTF)derivatives-tetrakis(p-halobenzylthio)tetrathiafulvalene and their precursors4,5-bis(p-halobenzylthio)-1.3-dithiole-2-thione is reported Theelectronic spectra of these TTF derivatives show that the energy differences between theirπ-orbitals are smaller than that between BEDT-TTF. The surface pressure-area isotherm fortetrakis(p-chlorobenzylthio)tetrathiafulvalene(TCBT-TTF) indicates that the new TTF derivatives may have good film-forming properties and may be used to prepare Langmuir-Blodgett films.

关键词： ?