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Chinese Chemical Letters 2017年第5期28卷 1074-1078页

作者： Zhang Zhang shi-Hong Lu Bin Xu xi-Cun Wang Key Laborarory of Eco-Environment-Related Polymer Materials Ministry of Education of ChinaLanzhou 730070China Gansu Key Laboratory of Polymer Materials College of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhou 730070China

A novel and general carbon-nitrogen and carbon-carbon cross-coupling reaction between 3,4-dihydropyrimidine-2-thiones and copper（Ⅰ） carboxylates were performed in the presence of palladium *** copper（Ⅰ） carboxylates act not only as desulfurative reagents but also as sources of carbon nudeophiles.A wide array of highly substituted and functionalized pyrimidines scaffolds were synthesized in good yields.

关键词： Dihydropyrimidinthiones Desulfitative Copper(Ⅰ) carboxylates Decarboxylative Cross-coupling

Advances in electrochemical transformation of N_(2)using molecular catalysts

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Science China Chemistry 2023年第10期66卷 2743-2753页

作者： Qiong Yuan Junnian Wei Dehui Deng Zhang-Jie shi Ping Chen Zhenfeng xi Beijing National Laboratory for Molecular Sciences Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of ChemistryPeking UniversityBeijing 100871China Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023China Department of Chemistry Fudan UniversityShanghai 200433China

The conversion of N_(2)to NH_(3)holds great importance due to the essential role of NH_(3)in fertilizer production,energy storage and the synthesis of key industrial *** of novel methods for N_(2)transformation is a worthwhile goal and researchers have turned their attention to electrochemical N_(2)reduction as a potentially sustainable *** development of molecular electrocatalysts has gained considerable momentum over the last decades,and this review focuses on the advances and challenges in the field of molecular electrochemical nitrogen fixation and aims to inspire further research into the realm of nitrogen fixation chemistry from an electrochemical perspective.

关键词： dinitrogen transformation dinitrogen complexes electrochemistry dinitrogen fixation electrocatalyst

Synthesis,Crystal Structure and Antitumor Activity of a Ca(Ⅱ) Coordination Polymer Based on 4-Acetylphenoxyacetate Ligands

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Chinese Journal of Structural Chemistry 2021年第3期40卷 324-328,272页

作者： CAO Shu-Hua TAI xi-shi xiN Chun-Ling College of Chemistry and Chemical Engineering Weifang UniversityWeifang 261061China

A novel Ca(Ⅱ) coordination polymer,[Ca L_(2)(H_(2)O)_(2)]_(n) (1,HL=4-acetylphenoxyacetic acid) has been synthesized with 4-acetylphenoxyacetic acid,Ca(ClO_4)_(2)·4H_(2)O and Na OH as raw *** 1 was characterized by elemental analysis and single-crystal X-ray diffraction *** results show that the Ca(Ⅱ)ion is eight-coordinated in a distorted triangular dodecahedral geometric configuration with six carboxylate Oatoms of four L ligands and two O atoms of two coordinated water *** 1 forms a one-dimensional chained structure by the bridging effect of carboxylate O *** antitumor activity of HLligand and complex 1 has also been investigated.

关键词： 4-acetylphenoxyacetic acid Ca(Ⅱ)coordination polymer synthesis crystal structure antitumor activity

HYDRAULIC RESEARCH OF AERATORS ON TUNNEL SPILLWAYS

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Journal of Hydrodynamics 2007年第3期19卷 330-334页

作者： RUAN shi-ping WU Jian-hua WU Wei-wei xi Ru-ze College of Water Conservancy and Hydropower Engineering Hohai University Nanjing 210098 China Anhui Institute of Hydraulic Research Bengbu 233000 China

The selection of the configuration and size of an aerator was of importance for a tunnel spillway under the conditions of high speed flows. Experimental investigations were conducted on the effects of entrained air on the tunnel spillway in the Goupitan Project, based on the criterion of gravity similarity and the condition of aerated flow velocity of over 6 m/s, with physical models. The configurations of the aerators were presented of a larger bottom air concentration, to protect the tunnel spillway from cavitation as well as to see no water fills in the grooves.

关键词： cavitation aerator air concentration tunnel spillway the Goupitan Project

Preparation of NiCoFe-hydroxide/polyaniline composite for enhanced-performance supercapacitors

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Journal of Materials Science & Technology 2019年第8期35卷 1691-1699页

作者： Lu Liu xi Hu Hong-Yan Zeng Mo-Yu Yi shi-Gen Shen Sheng Xu xi Cao Jin-Ze Du College of Chemical Engineering Xiangtan University

Ternary NiCoFe layer hydroxides with different Ni/Co/Fe molar ratios were prepared using simple urea *** finely tuning Ni/Co/Fe molar ratio,the optimized hydroxide(LDH(2.0)),a Ni/Co/Fe molar ratio of 2.0/1.0/1.0,provided high specific capacitance(408 F g^-1at 2.0 A g^-1)and good stability(90.9%retention over 1000 cycles)due to maximum crystallinity(91.35%crystallinity)and specific surface area(160 m^2g^-1).In order to further improve the electrochemical performances,the LDH(2.0)was made into a composite(LDH/PANI)with polyaniline(PANI)via in situ polymerization of aniline *** LDH/PANI composite had a much higher specific capacitance(717 F g^-1at 2.0 A g^-1)compared with the LDH(2.0),and a significant improvement of cycleability(84.7%retention over 1000 cycles).The results indicated that the LDH/PANI had a synergistic effect of both components due to the complementary properties,which guaranteed a good electric contact and consequently increased the specific *** provided a new approach for designing organic-inorganic composite materials with potential application in supercapacitors.

关键词： NiCoFe hydroxide Polyaniline Composite Supercapacitors

Pyrolysis of rice husk and sawdust for liquid fuel

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Journal of Environmental Sciences 2006年第2期18卷 392-396页

作者： ZHU xi-feng ZHENG Ji-lu GUO Qing-xiang ZHU Qing-shi Biomass Clean Energy Laboratory University of Science and Technology of China Hefei-230026 China

The paper is focused on studying how to convert rice husk and sawdust into liquid fuel. Rice husk, sawdust and their mixture were pyrolyzed at the temperature between 420℃ and 540℃, and the main product of liquid fuel was obtained. The experimental result showed that the yield of liquid fuel heavily depended on the kind of feedstock and pyrolysis temperature. In the experiments, the maximum liquid yields for rice husk, sawdust and their mixture were 56% at 465 ℃, 61% at 490℃ and 60% at 475℃ respectively. Analysis with GC-MS and other apparatus indicated that the liquid fuel is a complicated organic compound with low caloric value and can be directly used as fuel oil without any up-grading. As a crude oil, the liquid fuel can be refined to be vehicle oil.

关键词： solid organic waste rice husk sawdust pyrolysis liquid fuel

Ferroelectric perovskite PbTiO_(3)for advanced photocatalysis

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Rare Metals 2024年第9期43卷 4038-4055页

作者： Shuang Zhao shi-shi Shen Lu Han Bo-Chao Tian Na Li Wei Chen xi-Bao Li School of Materials and Metallurgy University of Science and Technology LiaoningAnshan 114051China School of Materials Science and Engineering Nanchang Hangkong UniversityNanchang 330063China Department of Chemistry National University of SingaporeSingapore 117543Singapore

The ferroelectric semiconductor material PbTiO_(3)exhibits remarkable spontaneous polarization and photoelectric properties,positioning it as a promising polar *** internal electric field of ferroelectrics can separate photocarriers and enhance the catalytic performance of ***,when combined with other semiconductors,PbTiO_(3)contributes to the construction of a depolarization field,extending the catalytic applications of PbTiO_(3)***_(3)exhibits optical absorption,semiconductor,and piezoelectric *** piezoelectric polarization field enhances charge separation,modulates band structure,surface charge conduction,and heterojunction interface charge conduction,thereby amplifying photocatalytic *** paper begins by examining the structure,properties,and preparation methods of PbTiO_(3).Subsequently,it delves into the optimization of PbTiO_(3)'s structure and performance,exploring applications in photocatalysis as a ferroelectric *** is placed on the detailed discussion of surface modification,heterostructure formation,and ferroelectric polarization of PbTiO_(3)*** aspects are thoroughly explored for their role in regulating activity and optimizing the performance of photocatalysis and photopiezoelectric *** conclusion,the paper addresses the current research status of PbTiO_(3)ferroelectric materials and highlights the challenges that lie *** intention is to provide valuable references for the ongoing research in PbTiO_(3)ferroelectric materials.

关键词： PbTiO_(3) Ferroelectric polarization Photocatalysis Piezoelectric catalysis Polarization

Signal transduction mechanism of TRB3 in rats with non-alcoholic fatty liver disease

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World Journal of Gastroenterology 2009年第19期15卷 2329-2335页

作者： Yu-Gang Wang Min shi Ting Wang Ting shi Jue Wei Na Wang xi-Mei Chen Department of Gastroenterology Shanghai Changning Central Hospital Shanghai 200336 China Department of Gastroenterology Tongji Hospital of Tongji University Shanghai 200065 China

AIM： To evaluate the possible role of Tribble 3 （TRB3） in a rat model of non-alcoholic fatty liver disease （NAFLD） and its signal transduction ***： Thirty Sprague-Dawley rats were randomized into three groups： normal control group, non-alcoholic fatty liver group A （fed on a high-fat diet for 8 wk） and group B （fed on a high-fat diet for 16 wk）. To determine the degree of hepatic steatosis in rats of each group, livers were stained with hematoxylin and eosin, and evaluated; real-time fluorescent quantitative reverse transcriptase-polymerase chain reaction was performed to measure the expression levels of TRI33 mRNA, and Western blotting analysis was done to determine the expression levels of protein kinase B （Akt） and phosphorylated protein kinase B （p-Akt-Thr308, p-Akt-Ser473）.RESULTS： Hepatic steatosis was evident in both NAFLD groups： mild to moderate hepatic steatosis occurred in group A, mainly as mild *** to severe hepatic steatosis occurred in group B, mainly as severe steatosis. The expression level of TRB3 mRNA in group B was significantly higher than in the control group （122.28 ± 95.37 vs 3.06 ± 2.33,P = 0.002） and group A （122.28 ± 95.37 vs 5.77 ± 4.20,P = 0.001）. There was no significant difference in the expression levels of Akt （1.03 ± 0.53 vs 1.12 ± 0.77,P = 0.729） and p-Akt-Thr308 （0.82 ± 0.45 vs 0.92 ± 0.38, P = 0.592） between group A and the control group. The expression level of Akt and p-Akt-Thr308 in group B was significantly lower than in group A （Akt 0.41 ± 0.16 vs 1.12 ± 0.77, P = 0.008; p-Akt-Thr308 0.47 ± 0.19 vs 0.82 ± 0.45, P = 0.036） and the control group （Akt 0.41 ± 0.16 vs 1.03 ± 0.53, P = 0.018;p-Akt-Thr308 0.47 ± 0.19 vs 0.92 ± 0.38, P = 0.010）.The expression level of p-Akt-Ser473 in group A was significantly higher than in group B （1.48 ± 0.50 vs 0.81± 0.39, P = 0.041） as well as the control group （1.48 ± 0.50 vs 0.45 ± 0.26, P = 0.003）.CONCLUSION： TRB3 blocks insulin signaling by inhibiting Akt activat

关键词： Non-alcoholic fatty liver disease Rat,Tribble 3 Protein Kinase B Insulin resistance

Highly selective synthesis of 3-methylindole from glycerol and aniline over Cu/NaY modifed by K_2O

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Chinese Chemical Letters 2013年第12期24卷 1127-1129页

作者： Yan-xi Cui Li-Dong Sun Qi Sun Lei shi Institute of Chemistry for Functionalized Materials Liaoning Normal University

The vapor-phase synthesis of 3-methylindole from glycerol and aniline over Cu/NaY modified by K2O was investigated. The catalysts were characterized by X-ray diffraction （XRD） and the temperature- programmed desorption of ammonia （NH3-TPD）. The effect of the reaction temperature on the activity and selectivity of Cu]NaY-K2O catalyst was also investigated. The results indicated that the addition of K2O to Cu/NaY increased the selectivity of the catalyst remarkably because the amount of middle-strong acid sites decreased clearly. The decrease of the reaction temperature was beneficial for the increase of 3- methylindole selectivity. Over Cu/NaY-K2O, the selectivity of 3-methylindole reached 75% and the yield of the target product was up to 47% at 220 ℃. A probable catalytic mechanism for the synthesis of 3- methylindole from glycerol and aniline was proposed.

关键词： 3-Methylindole Cu/NaY K2O promoter Glycerol Aniline

Phosphotungstic acid immobilized on amino-functionalized TS-1 zeolite as a solid acid catalyst for the synthesis of tributyl citrate

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Chinese Journal of Chemical Engineering 2024年第6期70卷 199-210页

作者： Pei Li Bianfang shi Junyao Shen Ran Cui Wenze Guo Ling Zhao Zhenhao xi State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of EducationEast China University of Science and TechnologyShanghai 200237China

The amino-functionalization of TS-1 zeolite followed by immobilization of phosphotungstic acid(HPW)was presented to prepare a strong solid acid catalyst for the synthesis of bio-based tributyl citrate from the esterification of citric acid and n-butanol.γ-Aminopropyltriethoxysilane(APTES)was first grafted on the TS-1 zeolite via the condensation reactions with surface hydroxyl groups,and subsequently the HPW was immobilized via the reaction between the amino groups and the protons from HPW-forming strong ionic *** Keggin structure of HPW and MFI topology of TS-1 zeolite were well maintained after the *** amino-functionalization generated abundant uniformly distributed active sites on TS-1 for HPW immobilization,which promoted the dispersity,abundance,as well as the stability of the acid *** tetrahedrally coordinated framework titanium and non-framework titania behaved as weak Lewis acid sites,and the protons from the immobilized HPW acted as the moderate or strong Brønsted acid *** optimized TBC yield of 96.2%(mol)with a conversion of-COOH of 98.1%(mol)was achieved at 150℃for 6 h over the HPW immobilized on amino-functionalized *** catalyst exhibited good stability after four consecutive reaction runs,where the activity leveled off at still a relatively high level after somewhat deactivation possibly caused by the leaching of a small portion of weakly anchored APTES or HPW.

关键词： Amino-functionalization Phosphotungstic acid TS-1 zeolite Esterification Tributyl citrate