检索结果-南通市图书馆

Synthesis,Structure and Luminescence of a Novel 2D Cadmium Coordination Polymer with a Ligand Generated in situ

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2007年第3期26卷 333-337页

作者： huANG Xi-He sheng Tian-Lu XIANG sheng-Chang FU Rui-Biao hu sheng-min LI Ya-min WU Xin-Tao State Key Laboratory of Structural Chemistry Fujian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

The hydrothermal reaction of 1,2-dicyanobenzene with NaN3 in the presence of Cd（NO3）2 affords a novel 2D cadmium tetrazolyl-benzoate, {Cd（tzbz）（H2O）}n （H2tzbz is 2-（5-tetrazolyl）-benzoate）. The tzbz ligand is generated in situ through the [2＋3] Sharpless cycloaddition reaction and hydrolyzation. Its crystal structure was determined by single-crystal X-ray diffraction method. The crystal crystallizes in the orthorhombic system, space group Pbca with a = 9.6659（19）, b = 7.6366（15）, c = 25.964（5）A, V= 1916.5（7）A^3, Z= 8, Mr = 318.57, Dc = 2.208 g/cm^3, F（000） = 1232 and p = 2.276 mm^-1. The Cd（Ⅱ） atom is coordinated by four tzbz ligands and one water molecule to form a severely distorted pentangle bipyramid. While each tzbz ligand connects to four Cd（Ⅱ） atoms in a μ4-η1, η, η1, η1, η1 coordination mode to construct a 2D architecture of the title complex. Additionally, the title complex exhibits strong fluorescence at room temperature in the solid state.

关键词： hydrothermal synthesis in situ crystal structure cadmium

Synthesis and Structure of a Dinuclear Copper(Ⅱ)-ditetrazolate Involving in situ Ligand Synthesis

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2007年第2期26卷 161-164页

作者： huANG Xi-He sheng Tian-Lu XIANG sheng-Chang FU Rui-Biao hu sheng-min LI Ya-min WU Xin-Tao State Key Laboratory of Structural Chemistry Fufian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fufian 350002 China

The hydrothermal reaction of 1,2-dicyanobenzene with NaN3 in the presence of CuC12, 2,2＇-bipyridine and H2O affords a novel dinuclear copper（Ⅱ）-ditetrazolate, [Cu（bpy）- （pdtz）]2 （Hpdtz = 5,5＂-1,2-phenylene-ditetrazole, bpy = 2,2＇-bipyridine）. The pdtz ligand is generated in situ through Sharpless 2＋3 cycloaddition reaction. Its crystal structure was determined by single-crystal X-ray diffraction method. The crystal crystallizes in the monoclinic system, space group P211n with a = 8.2096（16）, b = 18.580（4）, c = 11.838（2） A, β = 103.12（3）°, V = 1758.5（6） A^3, Z = 2, Mr = 863.83, Dc = 1.631 g/cm^3, F（000） = 876 and μ = 1.272 mm^-1. In this novel dinuclear structure, the pdtz ligand adopts a peculiar μ2-η1,η2 coordination mode.

关键词： hydrothermal synthesis in situ crystal structure copper ditetrazolate

Synthesis,Structure and Characterization of Bis(ethylene-1,2-dithiolate)(μ_(2)-di-2-pyridyl-ketone p-phenyldiamine-N,N')-tin(IV)Dichloromethane

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2005年第12期24卷 1355-1358页

作者： WANG Long-sheng ZHANG Jian-Jun hu sheng-min FU Rui-Biao WU Xin-Tao State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterThe Chinese Academy of SciencesFuzhouFujian 350002China

A new mononuclear tin（Ⅳ） complex [Sn（edt）2L]·CH2Cl2 （edt = ethane-1,2-dithiolate, L = di-2-pyridyl-ketone p-phenyldiamine） was obtained by a one-pot reaction which involves in situ formation of a new Schiff-base ligand L. The title compound （C22H24C12N484Sn） crystallizes in monoclinic, space group P211n with a = 13.438（1）, b = 12.2657（10）, c = 17.1477（13） k,, β = 99.323（ 1 ）°, V = 2789.1 （4） A, Z = 4, Mr = 662.28, Dc= 1.577g/cm^3, F（000） = 1328,μ= 1.426 mm^-1, the final R = 0.0450 and wR = 0.1077 for 3868 observed reflections （1 〉 2σ））. In the title compound, Sn^4＋ ion is six-coordinated with four sulfur atoms of two edt ligands and two nitrogen atoms of the ligand di-2-pyridyl-ketone p-phenyldiamine to form a highly distorted octahedron.

关键词： tin p-phenyldiamine ethene-1,2-thiolate di-2-pyridyl-ketone Schiff-base

Three New Silver Alkylenediphosphonates with Pillar-like Open-frameworks

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2005年第11期24卷 1231-1241页

作者： FU Rui-Biao hu sheng-min ZHANG hui-Shuang WANG Long-sheng LI Ya-min huANG Xi-He WU Xin-Tao State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Science Fuzhou Fujian 350002 China

Three new silver alkylenediphosphonates, [Ag2（HO3PCH2CH2CH2CH2PO3H）] 1, [Ag4（O3PCH2CH2CH2CH2PO3）] 2 and [Ag4（O3PCH2CH2CH2PO3（H2O）] 3, have been hydrotherreally synthesized and characterized by X-ray single-crystal and powder diffraction, elemental analyses, IR and thermogravimetric analyses （TGA）. The structures of these compounds are all threedimensional pillar-like open-frameworks with 18-membered [Ag2O4P4C8] channels for compound 1 and 2, and 16-member [Ag2O4P4C6] channels for compound 3. Both 2 and 3 contain interesting twodimensional Ag（Ⅰ） networks based on Ag...Ag interactions. 1,4-Butylene- and 1,3-propylene diphosphonate groups of 2 and 3 bond the first and second maximum metal atoms among metal organodiphosphonates with linking sixteen and fifteen silver（Ⅰ） atoms, respectively. In addition, the coordinated water molecules of 3 can be reversibly removed and recovered.

关键词： hydrothermal syntheses silver diphosphonate pillar-like single crystal

One New Schiff Base Complex with One in Situ Synthesized Ligand:Synthesis and Structure

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2006年第8期25卷 891-894页

作者： LI Ya-min ZHANG Jian-Jun sheng Tian-Lu FU Rui-Biao hu sheng-min LAI Zhu-Zhi WU Xin-Tao State Key Laboratory of Structural Chemistry Fujian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

One new Ni（Ⅱ） complex [Ni（H2L）]Cl（H2O）3 based on one in-situ synthesized Schiff base ligand H3L （H3L = bis（benzyl-2-pyridylidene）-diaminoguanidine） was prepared and structurally characterized by single-crystal X-ray diffraction method. The complex crystallizes in the monoclinic system, space group C2/c with a = 27.944（7）, b = 7.7405（19）, c = 25.999（7） ,A, β = 115.545（2）°, V = 5074（2） A^3, Mr = 566.69, Z = 8, Dc = 1.484 g/cm^3, F（000） = 2352,μ（MoKα） = 0.912 mm^-1, R = 0.0594 and wR = 0.1477 for 5145 observed reflections （1 〉 2σ（I））. The complex exhibits one mononuclear structure in which the Ni（Ⅱ） atom adopts a [NiN4] pseudo-planar square geometry. Interestingly, along the b axis, each two neighboring [Ni（H2L）]^＋ units by an inverse center form pairs of molecules through the intermolecular benzene-pyridine π…π interactions.

关键词： Schiff base guanidinate single-crystal structure

Syntheses, Crystal Structures and Different Magnetic Behaviors of Three Cyanide-bridged Fe^(Ⅱ)-M^(Ⅱ)(M = Fe, Co and Mn) Complexes

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2021年第9期40卷 1161-1168,1109页

作者： huANG Ying-Ying XU Qing-Dou hu sheng-min WU Xin-Tao sheng Tian-Lu College of Chemistry Fuzhou UniversityFuzhou 350002China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China

Three dinuclear cyanide-bridged complexes[Fe^(Ⅱ)(PY_(5)OMe_(2))CNM^(Ⅱ)(PY_(5)OMe_(2))](OTf)_(3) (M=Fe1,M=Co 2,M=Mn 3)(PY_(5)OMe_(2)=2,6-bis-((2-pyridyl)methoxymethane)pyridine OTf=CF_(3)SO_(3)^(-)) have been synthesized and ***-crystal diffraction analyses show these three dinuclear compounds are very similar in *** measured ν(CN) results for compounds 1~3 suggest that Mn^(2+) is electron-poorer than Fe^(2+) and Co^(2+).Meanwhile,the temperature dependence of magnetic susceptibilities of complexes 1~3 reveals that in these three complexes,all the cyanide-carbon coordinated Fe(Ⅱ) is low-spin,and Co(Ⅱ) for 2 and Mn(Ⅱ) for 3are both in a high-spin state through 2~400 K but the cyanide-nitrogen coordinated Fe(Ⅱ) for complex 1 exhibits spin crossover (SCO) behavior over 300 K and a hysteresis of 36 K in both cooling and heating modes.

关键词： cyanide-bridged magnetic property spin crossover

Epidemiology and current management of cerebrovascular disease in China

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2024年第5期21卷 465-474页

作者： sheng-Shou hu The Writing Committee of the Report on Cardiovascular Health and Diseases in China

The Annual Report on Cardiovascular Health and Diseases in China(2022)intricate landscape of cardiovascular health in *** connection with the previous section,this fifth section of the report continues the dissection on the manage-ment of cardiovascular diseases(CVD).Cerebrovascular disease is the leading cause of death and loss of healthy life among Chinese *** on the results of GBD 2019,from 1990 to 2019,the years of life lost due to premature death caused by stroke showed a decreasing trend,while the years lived with disability still increased *** present,national mortal-ity surveillance system can provide national and provincial representative annual death data on cerebrovascular disease,but the national representative data on some other important epidemiological indicators(such as incidence,prevalence,disability rate,and case fatality rate)are scarce in *** the construction of large cohort population and extension of follow-up time,re-search on stroke-related risk factors is increasing,providing a basis for the prevention and control of risk *** to limited large-scale population-based intervention studies,there is a lack of epidemiological evidence to transform into feasible interven-tion strategies and *** recent years,great progress in endovascular treatment for basilar-artery occlusion has been achieved in China,but there is still much room for improvement of guideline-based anticoagulant treatment and lipid-lowering treatment,as well as standardized diagnosis and treatment among patients with ischemic stroke.

关键词： prevention diagnosis Epidemiology

Epidemiology and current management of cardiovascular disease in China

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2024年第4期21卷 387-406页

作者： sheng-Shou hu the Writing Committee of the Report on Cardiovascular Health and Dis-eases in China Fuwai Hospital National Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina

The Annual Report on Cardiovascular Health and Diseases in China(2022) intricate landscape of cardiovascular health in China. This is the fourth section of the report with a specific focus on epidemiology and current management of cardiovascular disease(CVD) in China. This section of the report highlights the epidemiological trends of CVD in China. It reveal a concerning rise in prevalence, with approximately 330 million affected individuals, including significant numbers with stroke, coronary artery disease(CAD), heart failure, and other conditions. CVD stands as the primary cause of mortality among both urban and rural populations, accounting for nearly half of all deaths in 2020. Mortality rates are notably higher in rural areas compared to urban centers since 2009. While age-standardized mortality rates have decreased, the absolute number of CVD deaths has increased, primarily due to population aging. Ischemic heart disease, hemorrhagic and ischemic strokes are the leading causes of CVD-related deaths. Notably, the burden of atherosclerotic cardiovascular disease has risen substantially, with atherosclerotic cardiovascular disease-related deaths increasing from 1990 to 2016. The incidence of ischemic stroke and ischemic heart disease has shown similar increasing trends over the past three decades. CAD mortality, particularly acute myocardial infarction, has been on the rise, with higher mortality rates observed in rural areas since 2016. The prevalence of CAD has increased significantly, with over 11 million patients identified in 2013. Studies assessing hospital performance in managing acute coronary syndrome reveal gaps in adherence to guideline-recommended strategies, with disparities in care quality across hospitals. However, initiatives like the China Patient-centered Evaluative Assessment of Cardiac Events(PEACE)-Retrospective AMI Study and the Improving Care for Cardiovascular Disease in China-Acute Coronary Syndrome(CCC-ACS) project aim to improve patien

关键词： epidemiology landscape deaths

Influencing Factors on Cardiovascular Health in China

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2024年第1期21卷 4-33页

作者： sheng-Shou hu 无 Fuwai Hospital Chinese Academy of Medical Sciences BeijingChina the Writing Committee of the Report on Cardiovascular Health and Diseases in China

The Annual Report on Cardiovascular Health and Diseases in China(2022)intricate landscape of cardiovascular health in *** is the first section of the report,which dissects influential factors across diverse *** investigation identifies tobacco use as a paramount concern,portraying China as the global epicenter of tobacco *** smoking,exacerbated by second-hand smoke exposure,emerges as a critical and preventable risk factor,contributing to a surge in attributable deaths over the past three *** the realm of dietary nutrition,the study discerns an overall improvement,yet discerns worrisome deviations,notably an escalating fat intake surpassing recommended *** shifting dietary structure reveals diminished consumption of cereals and vegetables juxtaposed with an uptick in animal foods,while excessive intake of cooking oil and salt persists,straying substantially from endorsed *** exploration of physical activity patterns unfolds a nuanced *** trends are observed among students,with concerns arising from sedentary behaviors and inadequate adherence to recommended *** analysis spans a trajectory of declining physical activity in Chinese adults,coupled with an alarming surge in sedentary leisure time,ultimately linking these factors to heightened risks of cardiovascular diseases and increased *** examination of overweight and obesity trends uncovers a relentless upward trajectory,projecting substantial prevalence by *** prevalence rates underscore the imperative for targeted interventions to curtail this burgeoning health crisis,with the anticipated prevalence extending to nearly two-thirds of the adult *** factors,notably depression,constitute an integral facet of cardiovascular *** rates among patients with coronary artery disease and acute myocardial infarction underscore the intricate interplay between mental health and cardiovascular

关键词： Influencing smoke linking