检索结果-南通市图书馆

Reductive Cleavage of S-S Bond by Samarium Diiodide: Synthesis of β-Thioesters and β-Thionitriles

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1999年第1期10卷 7-8页

作者： hua jiang jiang Yong Min ZHANG(Department of Chemistry, Hangzhou University, Hangzhou, Zhejiang, 310028) Hangzhou Univ Dept Chem Hangzhou 310028 Peoples R China

The reduction of disulfides by samarium diiodide led to sa arium thiolates (ArSSml2).This new thiolate anion species reacted smoothly with α, β -unsaturated esters (nitriles) to give 1,4-addition products β -thioes... 详细信息

关键词： β-thioesters β-thionitriles samarium diiodide synth esis

Facile synthesis of indoles by K2CO3 catalyzed cyclization reaction of 2-ethynylanilines in water

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2017年第2期28卷 231-234页

作者： Zhi Chen Xiao-Xiao Shi Dong-Qin Ge Zhen-Zhen jiang Qi-Qi Jin hua-jiang jiang Jia-Shou Wu School of Pharmaceutical and Chemical Engineering Taizhou University Taizhou 318000 China

The cyclization reaction of 2-ethynyl-N-sulfonylanilides proceeded efficiently in water with the presence of a catalytic amount of K2CO3 under transition metal-free condition to give indoles in high *** recovery and r... 详细信息

关键词： 2-Ethynylanilines Cyclization reaction Indoles Water Potassium carbonate

A new and convenient synthesis of phendiones oxidated by KBrO_3/H_2SO_4 at room temperature

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2010年第11期21卷 1270-1272页

作者： Ren hua Zheng Hai Chang Guo hua jiang jiang Ke Hui Xu Bei-Bei Liu Wei Lin Sun Zhi Quan Shen Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China School of Pharmaceutical and Chemical Engineering Taizhou University Taizhou 317000 China

A new method is described to synthesize phendione derivatives from 1,10-phenanthrolines using potassium bromate and 60% sulfuric acid as oxidant,which was easily applicable to *** reaction conditions are mild and the ... 详细信息

关键词： Phendione 1 10-Phenanthroline KBrO3/H2SO4 Synthesis

Effect of Inclusions Containing Ti,Mg on Microstructure and Performance of HAZ in Low Carbon Steel

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2011年第S1期18卷 164-167页

作者： ZHAN Dong-ping,MA jiang-hua,jiang Zhou-hua,HE Ji-cheng,YU Jin (School of Materials and Metallurgy,Northeastern University,Shenyang 110819,China) Northeastern Univ Sch Met & Mat Shenyang 110819 Peoples R China

In order to study the effects of inclusions containing titanium,zirconium and magnesium on the impact toughness of heat affected zone (HAZ) of steel,two low carbon steels deoxidized by titanium,zirconium and magnesium were *** some treatments,the inclusion characteristics (size,morphology and chemistry) analysis,Charpy-type test,microstructure and the fracture observation were carried out on the prepared *** following results were *** inclusions containing Mg can keep more stable in *** inclusion containing Mg can enhance the impact toughness of HAZ,and the impacting energy reaches 249J at 253K when simulated input energy is 150kJ/*** inclusions with diameter smaller than 1.5 μm play a key role of pinning effect.

关键词： HAZ low carbon steel titanium zirconium magnesium

H_2S键合金属(Ⅱ)咪唑卟啉配合物的结构、光谱和反应活性

在线全文

学校读者我要写书评

暂无评论

物理化学学报 2011年第4期27卷 837-845页

作者：钟爱国黄凌蒋华江台州学院医药化工学院浙江临海317000

选取8个典型的二价金属咪唑卟啉MP(M=Ca,Mg,Zn,Cu,Ni,Fe,Co,Mn;P代表咪唑卟啉)与H2S(L)形成轴向金属配合物(L-MP;L-MP*-L,P*代表卟啉),应用轨道和自旋概念密度泛函工具,在优化构型的基础上,通过自然键轨道(NBO)方法和前线轨道能级研究... 详细信息

选取8个典型的二价金属咪唑卟啉MP(M=Ca,Mg,Zn,Cu,Ni,Fe,Co,Mn;P代表咪唑卟啉)与H2S(L)形成轴向金属配合物(L-MP;L-MP*-L,P*代表卟啉),应用轨道和自旋概念密度泛函工具,在优化构型的基础上,通过自然键轨道(NBO)方法和前线轨道能级研究了它们的分子结构、光谱性质和反应活性.模拟结果揭示L-MP和L-MP*-L结构、光谱及其反应活性不同于其前体***排斥钙而选择镁;L对MP的结构影响较少,与咪唑铁卟啉(FeP)能形成最稳定的单轴配合物(L-FeP),其电子吸收光谱较前体FeP有显著的变化;铁的亲核Fukui轨道指数值(f+Fe)大于其他原子的Fukui指数,且发生符号改变.铁体系的自旋极化Fukui密度图也支持以上结论.在这些典型的赤道键合配合物中,金属M与N(S)原子之间的二级微扰相互作用能、自然电荷以及概念密度泛函指数等存在一系列线性关系.以上结果可为理解内源性H2S与血管性物质的相互作用机理提供启示.

关键词：密度泛函理论概念DFT 信号分子金属卟啉配合物

1-[(4,6-二甲基-2-嘧啶)偶氮]-2-萘酚的合成及其与钴Ⅱ的显色反应

在线全文

学校读者我要写书评

暂无评论

冶金分析 2000年第3期20卷 20-22页

作者：蒋华江叶巧云孙芳台州市卫生防疫站!台州317000 台州师范专科学校化学系!台州317000

合成了新显色剂 1 [( 4 ,6 二甲基 2 嘧啶 )偶氮 ] 2 萘酚 (DMPAN) ,并研究了该试剂的性质及其与钴显色反应的条件。结果表明 :试剂的离解常数 pka=7 4,λmax=374 0nm ,在 pH6 2 2的磷酸盐缓冲介质中 ,试剂与钴形成红色 1∶1络合物 ... 详细信息

合成了新显色剂 1 [( 4 ,6 二甲基 2 嘧啶 )偶氮 ] 2 萘酚 (DMPAN) ,并研究了该试剂的性质及其与钴显色反应的条件。结果表明 :试剂的离解常数 pka=7 4,λmax=374 0nm ,在 pH6 2 2的磷酸盐缓冲介质中 ,试剂与钴形成红色 1∶1络合物 ,其最大吸收波长λmax=42 6nm ,络合比Co2 +∶R =1∶1 ,摩尔吸光系数ε=2 66× 1 0 4 ,钴量在 0～ 1 2 μg/mL范围内遵守比尔定律 ,在掩蔽剂作用下 ,可不经分离直接用于含钴样品的分析 ,结果满意。

关键词：钴分光光度法 1-[4,6-二甲基-2-嘧啶偶氮]-2-萘酚

无溶剂条件下新型功能离子液体催化活性亚甲基化合物与查尔酮的Michael加成研究

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

有机化学 2011年第8期31卷 1312-1318页

作者：应安国郑人华武承林梁华定葛昌华蒋华江台州学院医药化工学院台州317000

以基于DBU(1,8-diazabicyclo[5.4.0]undec-7-ene)的新型功能离子液体[DBU][Ac],[DBU][Lac],[DBU][Tfa],[DBU][n-Pr]和[DBU][n-Bu]为催化剂,研究了无溶剂条件下活性亚甲基化合物与查尔酮的Michael加成反应.反应时间短、收率高、后处理简... 详细信息

关键词： DBU 功能离子液体 Michael加成重复使用

Quality control measures for lowering the seroconversion rate of hemodialysis patients with hepatitis B or C virus

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2012年第3期11卷 302-306页

作者： Jing Yuan,Yi Yang, Fei Han, Ping Zhang, Xiao-Ying Du, hua jiang and jiang-hua Chen The Kidney Disease Center, First Affiliated Hospital, Zhejiang University School of Medicine (Yuan J, Yang Y, Han F, Zhang P, Du XY, jiang H and Chen JH) and Hemodialysis Quality Control Center of Zhejiang Province (Yuan J, Zhang P, Du XY and Chen JH), Hangzhou 310003, China [a] The Kidney Disease Center First Affiliated Hospital Zhejiang University School of Medicine Hangzhou 310003 China [b] Hemodialysis Quality Control Center of Zhejiang Province Hangzhou 310003 China

BACKGROUND: Hemodialysis (HD) patients are at high risk of infection by hepatitis B virus (HBV) or hepatitis C virus (HCV). The present study was designed to determine the impact of quality control measures on the prevention of transmission of blood-borne viruses. METHODS: A total of 6182 adult maintenance HD patients from all HD units in Zhejiang Province were recruited on January 1, 2007. The baseline demographic and clinical characteristics were recorded and all patients were followed up until death or survival at 4 years later. The Quality Control Standards of Hemodialysis were gradually implemented in HD units. The HBV or HCV seroconversion rates of the recruited patients were calculated and compared every year during the observation period. RESULTS: The prevalence of HBV was 8.3% at the beginning of the study, and 6.6% for HCV. With the implementation of the HD quality control measures, the HBV seroconversion rate tended to decrease year by year (χ 2 =6.620, P=0.085), and the HCV seroconversion rate decreased significantly (χ 2 =10.41, P=0.015). Compared with the data in 2007, the HBV seroconversion rate (χ 2 =4.204, P=0.040, relative risk ratio 0.393, 95% CI 0.156-0.991) and the HCV seroconversion rate (χ 2 =7.373, P=0.007, relative risk ratio 0.386, 95% CI 0.189-0.787) decreased significantly in 2010. CONCLUSION: Quality control measures for HD decreased the seroconversion rates of HBV or HCV in HD patients, showing that updated quality control measures reduce the risk for transmission of blood-borne viruses in the HD population.

关键词： hemodialysis quality control measures infection hepatitis B virus hepatitis C virus

正电性磁性氧化铁胶粒负载钯催化的Suzuki偶联反应

在线全文

学校读者我要写书评

暂无评论

有机化学 2009年第10期29卷 1587-1592页

作者：刘诗咏吴家守蒋华江金正能姜玄珍浙江省台州学院城东校区医化学院临海317000 浙江大学玉泉校区理学院化学系杭州310027

发展了一种超顺磁性Fe3O4纳米粒子负载Pd0的简易方法.利用Fe3O4溶胶带正电荷的特性,将负离子PdCl42-通过静电作用吸附在Fe3O4胶体粒子表面(PdCl24-/Fe3O4),以抗坏血酸(Vc)进一步还原即得到载有金属Pd团簇的Fe3O4胶体粒子(Pd0/Fe3O4).该... 详细信息

发展了一种超顺磁性Fe3O4纳米粒子负载Pd0的简易方法.利用Fe3O4溶胶带正电荷的特性,将负离子PdCl42-通过静电作用吸附在Fe3O4胶体粒子表面(PdCl24-/Fe3O4),以抗坏血酸(Vc)进一步还原即得到载有金属Pd团簇的Fe3O4胶体粒子(Pd0/Fe3O4).该磁性载体负载的Pd催化剂对Suzuki反应表现出良好的催化活性,且在反应后,可方便地通过永久磁铁将催化剂从反应体系中分离出来,进行循环使用.试验表明,该催化剂在循环使用五次后反应活性无明显下降.进一步试验发现,这种磁性纳米粒子负载的金属钯对一系列卤代芳烃的Suzuki偶联反应均表现出较优的催化活性.

关键词：钯纳米粒子正电荷溶胶磁性氧化铁 Suzuki反应