检索结果-南通市图书馆

Tungsten 2022年第2期4卷 121-129页

作者： Meng Zhao Xi-Yu Zhu Yan-Zhen Li Jiang-Nan Chang Ming-Xue Li Li-Hua Ma Xiao-Yuan Guo Henan Key Laboratory of Polyoxometalate Chemistry Institute of Molecular and Crystal EngineeringSchool of Chemistry and Chemical EngineeringHenan UniversityKaifeng475004China Agricultural Products’Quality and Safety Testing Center of Kaifeng Kaifeng Agriculture and Rural BureauHenan475004China

In this paper,a new organic–inorganic hybrid compound[Co(L)_(2)]2[W_(6)O_(19)](1)(HL=2-acetylpyridine thiosemicarbazone)was prepared and characterized.The compound 1 exhibits remarkable antibacterial activity by determination of minimum inhibitory concentration(MIC)against Staphylococcus aureus(S.aureus,0.06μg·mL^(−1))and Escherichia coli(E.coli,0.24μg·mL^(−1)),respectively.Furthermore,the potential mechanism of compound 1 was studied in detail.The potential causes of bacteria death were cell wall/membrane disruption,inhibition of intracellular respiratory chain dehydrogenases(RCD)activity,destruction of reactive oxygen species(ROS)and depletion of glutathione(GSH).

关键词： isopolytungstate Thiosemicarbazone Bioactivity Mechanism of action

RAMAN SPECTRAL STUDY ON isopolytungstateS IN AQUEOUS SOLUTION

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1998年第4期8卷 157-161页

作者： Liu, Shijun Chen, Qiyuan Zhang, Pingmin Li, Songqin Central South Univ of Technology Changsha China

ＩＮＴＲＯＤＵＣＴＩＯＮＡｌａｒｇｅｎｕｍｂｅｒｏｆｓｔｕｄｉｅｓｈａｖｅｂｅｎｄｏｎｅｉｎｔｈｅｆｉｅｌｄｏｆｔｈｅａｑｕｅｏｕｓｃｈｅｍｉｓｔｒｙｏｆｉｓｏｐｏｌｙｔｕｎｇｓｔａｔｅｕｓｉｎｇｎｕｍｅｒｏｕｓｅ... 详细信息

ＩＮＴＲＯＤＵＣＴＩＯＮＡｌａｒｇｅｎｕｍｂｅｒｏｆｓｔｕｄｉｅｓｈａｖｅｂｅｎｄｏｎｅｉｎｔｈｅｆｉｅｌｄｏｆｔｈｅａｑｕｅｏｕｓｃｈｅｍｉｓｔｒｙｏｆｉｓｏｐｏｌｙｔｕｎｇｓｔａｔｅｕｓｉｎｇｎｕｍｅｒｏｕｓｅｘｐｅｒｉｍｅｎｔａｌｍｅｔｈｏ...

关键词： Raman spectra isopolytungstate paratungstate metatungstate

Synthesis and Characterization of a New Pure Inorganic 2D Network Based on [H_2W_(12)O_(42)]^(10-)

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2010年第9期29卷 1426-1430页

作者：郝青华韩占刚吴晶晶王彦娜 College of Chemistry and Material Science Hebei Normal University

An isopolytungstate（NH4）6Na4[H2W12O42]·14H2O（1） has been synthesized in an aqueous solution and characterized by elemental analysis,IR spectroscopy,TG analysis,X-ray powder diffraction（XRD） and single-crystal X-ray diffraction.The result indicates a degradation from nitrilotriacetic acid（NTA） to NH3.The electrochemical analysis and thermal stability of 1 were also studied.The crystal data are as follows：H54N6Na4O56W12（Mr = 3332.65）,orthorhombic,Pbca,a = 14.1497（15）,b = 15.9414（16）,c = 22.931（2） ,Z = 4,V = 5172.4（9） 3,Dc = 4.280 Mg/m3,μ = 26.729 mm-1,F（000） = 5904,the final R = 0.0809 and wR = 0.2104 for 4565（Rint = 0.1351） independent reflections.The β-[H2W12O42]10-clusters are linked through {Na2（OH2）3} groups into a 2D layer and are further connected into a 3D framework via hydrogen bonding interactions.

关键词： polyoxometalate isopolytungstate degradation crystal structure electrochemical property

Synthesis,Crystal Structure and Thermal Stability of Homopolytungstate Supporting Nickel(Ⅱ) Coordination Fragments

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2007年第4期23卷 391-394页

作者： LIU Kun MENG Fan-xiaI MA Feng-xia CHEN Ya-guang Key Laboratory of Polyoxometalates Science of Ministry of Education College of Chemistry Northeast Normal University Changchun 130024 P. R. China Basic Science Department Jilin Agricultural Science and Technology College Jilin 132101 P. R. China

The orsano-inorganic hybrid compound [ Ni（phen）3] [ （H2W12O40） { Ni（phen）2H2O} { Ni（trien） } ]·2H2O was synthesized from Na2 WO4·2H2O, NiSO4·6H2O, CH3COOK, triethylenetetramine and 1,10-phenanthroline in water by the hydrothermal reaction, and characterized by IR, X-ray single crystal diffraction, and TG-DTA analysis. This compound crystallized in the monoclinic system, space group P2 （1）/n, with lattice constants： a =1.80998 （6） nm, b =2.36504（8） nm, c =2.29199（7） nm,β= 110.2220（10）°, V=9.2065（5） nm, Z=4. Final R indices R1=0.0532. ωR2=0.1295. The compound is decomposed at 593℃.

关键词： isopolytungstate Nickel complex Crystal structure Organo-inorganic hybrid Supramolecular architecture Thermal stability

Synthesis and crystal structure of dodecatungstic acid with icosahedron

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1997年第7期42卷 557-560页

作者： Melvyn Churchill Department of Chemistry State University of New York Buffalo NY14260 USA

POI YOXOMETALATES have become a unique branch in chemistry because of their application in medicine and in industry as catalyst. Furthermore, polyoxometalates pose fundamental questions with respect to the elucidation of their reactivity and general coordination chemistry, of the mechanisms of interconversion of various structural types. In our investigation of

关键词： icnsahedron isopolytungstate crystal structure.

THE MECHANISM OF TRANSFORMATION FROM PARATUNGSTATE A TO PARATUNGSTATE B

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1990年第12期35卷 1006-1010页

作者：蒋安仁宫可印庞震 Department of Chemistry Fudan University Shanghai 200433 PRC

Both paratungstate A and paratungstate B（para A and para B for short）are distinct isopolytungstates with Z value（H+/W）of 1.14. When WO42- aqueous solution is acidised to Z=1.14, para A forms rapidly, while para B forms only after heating fora long time. Because the transformation rate from para A to para B is extremely slow and there is no reli-

关键词： isopolytungstate paratungstate mechanism of transformation adsorption-condensation mechanism.