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SO_4^(2-)/TiO_2-MoO_3催化剂催化合成缩醛(酮)

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石油化工 2003年第11期32卷 944-948页

作者：杨水金白爱民孙聚堂湖北师范学院化学与环境工程系湖北黄石435002 武汉大学化学与分子科学学院湖北武汉430072

以固体超强酸SO42-/TiO2-MoO3为催化剂,对以环己酮、丁酮、正丁醛、异丁醛和乙二醇、丙二醇为原料合成缩醛(酮)的反应条件进行了研究。实验表明,固体超强酸SO42-/TiO2-MoO3是合成缩醛(酮)的良好催化剂,较系统地研究了醛(酮)/醇摩尔比、... 详细信息

以固体超强酸SO42-/TiO2-MoO3为催化剂,对以环己酮、丁酮、正丁醛、异丁醛和乙二醇、丙二醇为原料合成缩醛(酮)的反应条件进行了研究。实验表明,固体超强酸SO42-/TiO2-MoO3是合成缩醛(酮)的良好催化剂,较系统地研究了醛(酮)/醇摩尔比、催化剂用量、反应时间诸因素对产品收率的影响。最佳反应条件为:n(醇)/n(酮或醛)=1.3/1或1.5/1,催化剂用量为反应物料总质量的0.25％～1.5％,反应时间为1.0 h。在最佳反应条件下,环己酮-乙二醇缩酮的收率为82.7％,环己酮-1,2-丙二醇缩酮的收率为83.4％,丁酮-乙二醇缩酮的收率为74.1％,丁酮-1,2-丙二醇缩酮的收率为94.9％,丁醛-乙二醇缩醛的收率为68.1％,丁醛-1,2-丙二醇缩醛的收率为87.5％,异丁醛-乙二醇缩醛的收率为70.7％,异丁醛-1,2-丙二醇缩醛的收率为82.5％。

关键词：缩醛缩酮 SO4^2-/TiO2-MoO3环己酮丁酮正丁醛异丁醛乙二醇催化合成

Durable poly(binaphthyl-co-p-terphenyl piperidinium)-based anion exchange membranes with dual side chains

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Journal of Energy chemistry 2024年第2期89卷 324-335,I0008页

作者： Weiting gao Xuelang gao Qiugen Zhang Aimei Zhu Qinglin Liu Department of Chemical&Biochemical Engineering Fujian Provincial Key Laboratory of Theoretical and Computational ChemistryThe College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina Department of chemistry Pohang University of Science and Technology(POSTECH)Pohang 790-784South Korea

Building well-developed ion-conductive highways is highly desirable for anion exchange membranes(AEMs).Grafting side chain is a highly effective approach for constructing a well-defined phaseseparated morphological structure and forming unblocked ion pathways in AEMs for fast ion *** of side chains can further enhance phase separation due to the superhydrophobic nature of fluorine ***,their electronic effect on the alkaline stability of side chains and membranes is rarely ***,fluorine-containing and fluorine-free side chains are introduced into the polyaromatic backbone in proper configuration to investigate the impact of the fluorine terminal group on the stability of the side chains and membrane *** poly(binaphthyl-co-p-terphenyl piperidinium)AEM(QBNp TP)has the highest molecular weight and most dimensional stability due to its favorable backbone arrangement among ortho-and meta-terphenyl based ***,by introducing both a fluorinated piperidinium side chain and a hexane chain into the p-terphenyl-based backbone,the prepared AEM(QBNp TP-QFC)presents an enhanced conductivity(150.6 m S cm^(-1))and a constrained swelling at 80℃.The electronic effect of fluorinated side chains is contemplated by experiments and *** results demonstrate that the presence of strong electro-withdrawing fluorine groups weakens the electronic cloud of adjacent C atoms,increasing OH^(-)attack on the C atom and improving the stability of piperidinium *** QBNp TP-QFC possesses a robust alkaline stability at 80℃(95.3%conductivity retention after testing in 2 M Na OH for 2160 h).An excellent peak power density of 1.44 W cm^(-2)and a remarkable durability at 80℃(4.5%voltage loss after 100 h)can be observed.

关键词： Anion exchange membranes Backbone structure Fluorinated side chain Alkaline stability

Dipyrrolyiquinoxaline-bridged Hydrazones as New Chemosensors for Copper（Ⅱ） Ion

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Dipyrrolyiquinoxaline-bridged Hydrazones as New Chemosensors...

全国第十四届大环化学暨第六届超分子化学学术讨论会

作者： GUO Qian-ni ZHANG zhi LU Yun-guo CHUAN gao LI Zao-ying~* college of chemistry and molecular sciences,wuhan university wuhan(430072)P.R.china

＜正＞The design of artificial chemosensors for selective and sensitive quantification of biologically and environmentally important ion species,especially transition-metal ions,

关键词： dipyrrolylquinoxaline-hydrazones chemosensors

Interaction of Aqueous Thiourea Derivatives with Bovine Serum Albumin

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Interaction of Aqueous Thiourea Derivatives with Bovine Seru...

大环化学和超分子化学的新发展——当前学科交叉的一个重要桥梁——中国化学会全国第十五届大环化学暨第七届超分子化学学术讨论会

作者： LI Qian-Qian HU Yuan LI Zao-Ying~* (college of chemistry and molecular sciences,wuhan university,wuhan 430072,P.R.china)

Serum albumin,an abundant protein constituent of blood plasma,facilitates the disposition and transportation of various exogenous and endogenous *** are capable of binding an extraordinarily broad range of pharmaceuti... 详细信息

关键词： thiourea derivatives bovine serum albumin interaction

Chlorajaponins A—Q,Lindenane-Related Sesquiterpenoid Dimers from Chloranthus japonicus and Their Biological Activities

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Chinese Journal of chemistry 2024年第11期42卷 1247-1259页

作者： Wei-Jiao Feng Yue Gu Pei-zhi Huang Hong-Ying Yang Rui Zhang Yi-Lin He Ting-Hong Lv Ya Li Kun gao State Key Laboratory of Applied Organic chemistry College of Chemistry and Chemical EngineeringLanzhou UniversityLanzhouGansu730000 China Research Institute Lanzhou Jiaotong UniversityLanzhouGansu730070 China

Seventeen undescribed lindenane-related sesquiterpenoid dimers,chlorajaponins A—Q(1—17),and 13 reported analogs(18—30)were isolated from Chloranthus japonicus *** 1 possesses an unprecedented 3/5/7/5/5/6/5/3 fused octacyclic scaffold,featuring a 6(5→4)-abeo-lindenane monomer,while 2 exhibits a 3/5/6/6/5/6/5/3 fused octacyclic *** structures were determined through a combination of spectroscopic analyses and X-ray *** 1,2,and 18 demonstrated significant inhibitory effects on lipid accumulation and effectively reduced the levels of triglycerides and total cholesterol,as well as the levels of aspartate aminotransferase and alanine aminotransferase in a HepG2 cell *** addition,compounds 1,2,and 18 significantly suppressed the protein expression of the fatty acid synthase(FASN)and the sterol regulatory element-binding protein 1(SREBP1).Moreover,the anti-inflammatory assay showed that compounds 19—22 and 25 inhibited the NO production induced by lipopolysaccharide in RAW 264.7 macrophages with IC50 values of 7.89±0.44,6.25±0.46,2.98±0.29,10.77±0.60,and 3.60±0.28μmol/L.

关键词： Chloranthus japonicus Lindenane-type sesquiterpenoid dimers Lipid-lowering activity Anti-inflammatory activity NMR spectroscopy Natural products X-ray diffraction

Synthesis and photophysical properties of Ir~Ⅲ-Ln~Ⅲ(Ln=Nd,Yb,Er) bimetallic complexes containing bipyrimidines as bridging ligands

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Science china chemistry 2009年第11期52卷 1808-1813页

作者： CHEN FangFang,JIANG WeiLi,LOU Bin,BIAN ZuQiang & HUANG ChunHui Beijing National Laboratory for molecular sciences,State Key Laboratory of Rare Earth Materials chemistry and Applications,college of chemistry and molecular Engineering,Peking university,Beijing 100871,china Beijing National Laboratory for molecular sciences State Key Laboratory of Rare Earth Materials Chemistry and Applications College of Chemistry and Molecular Engineering Peking University Beijing China

Bipyrimidines have been chosen as(N^N)(N^N) bridging ligands for connecting metal ***Ⅲ-LnⅢ(Ln = Nd,Yb,Er) bimetallic complexes [Ir(dfppy)2(μ-bpm)Ln(TTA)3]Cl were synthesized by using Ir(dfppy)2(bpm)Cl as the ligand coordinating to lanthanide complexes Ln(TTA)3·*** stability constants between Ir(dfppy)2(bpm)Cl and lanthanide ions were measured by fluorescence *** obvious quenching of visible emission from IrⅢ complex in the IrⅢ-LnⅢ(Ln = Nd,Yb,Er) bimetallic complexes indicates that energy transfer occurred from IrⅢ center to *** emissions from NdⅢ,YbⅢ,and ErⅢ were obtained under the excitation of visible light by selective excitation of the IrⅢ-based *** was proven that Ir(dfppy)2(bpm)Cl as the ligand could effectively sensitize NIR emission from NdⅢ,YbⅢ,and ErⅢ.

关键词： bipyrimidine IrⅢ-LnⅢ bimetallic complexes stability constant NIR emission excitation of visible light

Synthesis A Series of Novel Aqueous Thiourea Derivatives and Metal Complexes

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Synthesis A Series of Novel Aqueous Thiourea Derivatives and...

大环化学和超分子化学的新发展——当前学科交叉的一个重要桥梁——中国化学会全国第十五届大环化学暨第七届超分子化学学术讨论会

作者： LI Qian-qian HU Yuan LI Zao-Ying~* (college of chemistry and molecular sciences,wuhan university,wuhan 430072,P.R.china)

Thiourea derivatives display a wide range of biological activity,including antibacterial,antifungal, antitubercular,antithyroid,antihelmintic,rodenticidal,insecticidal,herbicidal,and plant-growth regulator *** of aque... 详细信息

关键词： thiourea derivative metal complex synthesis

Effects of Substrate Local Strain on Microstructure of Electrodeposited Aluminum Film

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Journal of wuhan university of Technology(Materials Science) 2006年第3期21卷 69-71页

作者：谭月华 college of chemistry and Chemical Engineering Xinjiang UinversityUrumqi 830046China

The aluminum coating layer was formed on a copper substrate with lacal strain region by using the electrodeposited method. It was found that the particle shape of the coating deposited on the copper substrate is very sensitive to the strain extent of substrate. The large needle-like aluminum particles were observed on the substrate region with large local strain, indicating that substrate local strain may affect the shape of the deposited particles and promote the nucleation and growth of the deposited particles.

关键词： electrodeposition strain energy particle shade

Antiviral compounds and one new iridoid glycoside from Cornus officinalis

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Progress in Natural Science:Materials International 2006年第2期16卷 142-146页

作者： WANG Yue, LI Zhengquan, CHEN Lirong and XU Xiaojie (college of chemistry and molecular Engineering, Peking university, Beijing 100871, china) [a]college of chemistry and molecular Engineering Piking University Beijing China

From Cornus officinalis Sieb. et Zucc., bioassay-guided fractionation led to the isolation of four active tannin compounds with high effectiveness of inhibiting Hepatitis C virus NS3 serine protease in vitro. The compounds are: 1,2,3, 6-tetragalloyl-β-D-glucopyranose (1), 1,2,3,4,6- pentagalloyl-β-D-glucopyranose (2), Tellimagrandin I (3) and Tellimagrandin II(4). The four compounds could inhibit HCV NS3 protease in vitro with IC50 values of 6.98, 5.11, 7.0 and 4.8μmol/L respectively. In addition, a new iridoid glycoside (5) was also isolated from Cornus officinalis Sieb. et Zucc., which was assigned to be 7-O-butyl morroniside by spec-troscopic analysis.

关键词： inhibitor HCV NS3 protease iridoid glycoside Cornus officinalis Sieb. et Zucc.