检索结果-南通市图书馆

Synthesis of carbosilane dendrimers with N,N-dimethylaniline as end groups

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2009年第3期20卷 300-301页

作者： Wen Yan Sun Deng Xu Wang sheng yu feng School of Chemistry and Chemical Engineering Shandong University Ji'nan 250100 China

Carbosilane dendrimers with 4-bromo-N,N-dimethylaniline as end groups were synthesized from methyltfichlorosilane, aUyl chloride, magnesium and 4-bromo-N,N-dimethylaniline. All compounds were characterized by ^1H NMR,... 详细信息

关键词： Dendrimer Synthesis Carbosilane

The Preparation of the Carbosilane Dendrimers with Pentafluorophenyl Groups

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2006年第9期17卷 1159-1161页

作者： Rui Fang GUAN Chuan Jian ZHOU sheng yu feng School of Materials Science and Engineering Ji＇nan University Ji＇nan 250022 School of Materials Science and Engineering Shandong University Ji＇nan 250061 School of Chemistry and Chemical Engineering Shandong University Ji＇nan 250100

Polysiloxane was a good solvent for hydrosilation reaction of carbosilane dendrimers with pentafluorophenyl core and HSiMeE（CH2）3C6F5. A new kind of dendrimer with both pentafluorophenyl core and terminal groups was synthesized. The studies showed that with the increase of fluorination, the viscosity values of carbosilane dendrimers decreased.

关键词： Polysiloxane hydrosilation carbosilane dendrimer pentafluorobenzene low viscosity.

A series of carbosilane dendrimers with acetyl end-group:From synthesis to their unique optical characteristics

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2009年第9期20卷 1085-1087页

作者： Wen Yan Sun Hai feng Lu Deng Xu Wang sheng yu feng School of Chemistry and Chemical Engineering Shandong University Ji'nan 250100 China

A series of c arbosilane dendrimers with acetyl end-group were synthesized. Their structures were characterized by 1H NMR, IR, and MS, respectively. Then dendrimers were coordinated with lanthanide ions （Eu3＋ and Tb3＋, respectively）. The luminescence spectra of the complexes show narrow-width emissions in visible light region. 2009 sheng yu feng. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Synthesis Carbosilane dendrirner Luminescence Lanthanide ions

Medical comorbidities at admission is predictive for 30-day in-hospital mortality in patients with acute myocardial infarction： analysis of 5161 cases

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2011年第1期8卷 31-34页

作者： Xue-Dong Yang yu-sheng Zhao yu-feng Li Xin-Hong Guo Institute of Geriatric Cardiology Chinese PLA General Hospital Beijing 100853 China

Background The present study investigated the prognostic value of medical comorbidities at admission for 30-day in-hospital mortality in patients with acute myocardial infarction （AMI）. Methods A total of 5161 patients with AMI were admitted in Chinese PLA General Hospital between January 1, 1993 and December 31, 2007. Medical comorbidities including hypertension, diabetes mellitus, previous myocardial infarction, valvular heart disease, chronic obstructive pulmonary disease （COPD）, renal insufficiency, previous stroke, atrial fibrillation and anemia, were identified at admission. The patients were divided into 4 groups based on the number of medical comorbidities at admission （0, 1, 2, and ≥3）. Cox regression analysis was used to calculate relative risk （RR） and 95% confidence intervals （CI）, with adjustment for age, sex, heart failure and percutaneous coronary intervention （PCI）. Results The mean age of the studied population was 63.9 ± 13.6 years, and 80.1% of the patients were male. In 74.6% of the patients at least one comorbidity were identified. Hypertension （50.7%）, diabetes mellitus （24.0%） and previous myocardial infarction （12%） were the leading common comorbidities at admission. The 30-day in-hospital mortality in patients with 0, 1, 2, and ≥3 comorbidities at admission （7.2%） was 4.9%, 7.2%, 11.1%, and 20.3%, respectively. The presence of 2 or more comorbidities was associated with higher 30-day in-hospital mortality compared with patients without comorbidity （RR： 1.41, 95% CI： 1.13-1.77, P = 0.003, and RR： 1.95, 95% CI： 1.59-2.39, P = 0.000, respectively）. Conclusions Medical comorbidities were frequently found in patients with AMI. AMI patients with more comorbidities had a higher 30-day in-hospital mortality might be predictive of early poor outcome in patients with AMI.

关键词： acute myocardial infarction comorbidity mortality

Synthesis of ester-capped carbosilane dendrimers via a hybrid divergent–convergent method

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2014年第11期25卷 1419-1422页

作者： yu-Zhong Niu Lin Zhang Shu-Jie Liang Deng-Xu Wang sheng-yu feng School of Chemistry and Materials Science Ludong University Key Laboratory of Special Functional Aggregated Materials Ministry of Education School of Chemistry and Chemical Engineering Shandong University

A series of novel ester-capped carbosilane dendrimers（G0-COOCH3–G2-COOCH3） were designed and successfully synthesized via a hybrid divergent–convergent method through a facile hydrosilylation reaction. The structu... 详细信息

关键词： Synthesis Characterization Ester-capped Carbosilane dendrimers Divergent–convergent method

Preparation of Dendritic Carbosilane-supported Palladium Catalyst and Its Catalytic Activity in Hydrogenation of Organic Compounds

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2005年第10期16卷 1389-1392页

作者： Chun Fang LI Dong Xiang LI Zhi Jie ZHANG sheng yu feng School of Chemistry and Chemical Engineering Shandong University Jinan 250100 School of Chemistry Chemical Engineering and Materials Shandong Normal University Jinan 250014 Institute of Chemistry Chinese Academy of Sciences Beijing 100080

The preparation of palladium complex from PdCl2·2H2O and carbosilane dendrimers with pelripheral aminopropyl groups was described. The compound obtained was characterized by IR, H NMR, X-ray photoelectron spectroscopy （XPS） and inductively coupled plasma atomic emission spectrometric （ICP-AES） spectroscopy respectively. The metal complex was employed as catalyst in hydrogenation of organic compounds. The high activity of the complex was probably due to the formation of the coordinatively unsaturated palladium.

关键词： Dendrimer complex catalysis.

Mechanical Properties of Silicone Rubber Using Carbosilane Dendrimers as the Cross-linker

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2005年第10期16卷 1383-1385页

作者： Shi Gui ZHAO Chuan Jian ZHOU Jian Ming ZHANG sheng yu feng School of Material Science and Engineering Shandong University Jinan 250061 School of Chemistry and Chemical Engineering Shandong University Jinan 250100

Peroxide-cured high-temperature vulcanized （HTV） silicone rubber was prepared by using allyl-capped carbosilane dendrimers, in which the core molecule is Si（CHaCH=CH2）4, as the cross-linker. It showed that this ki... 详细信息

关键词： Carbosilane dendrimers cross-linker silicone rubber mechanical properties.

Synthesis of polyacrylonitrile-block-polydimethylsiloxane-block-polyacrylonitrile triblock copolymers via RAFT polymerization

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2012年第8期23卷 989-992页

作者： Zheng yue Deng Xu Wang Jing Quan Liu Jie Zhang sheng yu feng Key Laboratory of Special Functional Aggregated Materials Ministry of EducationSchool of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China Department of Chemistry Qingdao UniversityQingdao 266003China

A new A-B-A type of block copolymers,polyacrylonitrile-block-polydimethylsiloxane-block-polyacrylonitrile（PAN-b-PDMSb-PAN）,which comprises two polymer blocks of different polarities and compatibilities,were synthesized for the first time via reversible addition-fragmentation chain transfer *** kinetics was ***-b-PDMS-b-PAN films were prepared by spin-coating on glass *** order on the film surface morphologies was observed.

关键词： RAFT polymerization Block polymers Polysiloxane Polyacrylonitrile Film surface morphology

Synthesis of 4(3H)-Quinazolinone Derivatives and Their in vitro Antitumor Activity

在线全文

学校读者我要写书评

暂无评论

有机化学 2004年第Z1期24卷 247-248页

作者： CAO,sheng-Li feng,yu-Ping FU,Hua feng,Ke-Ran Department of Chemistry Capital Normal University Beijing 100037 Key Laboratory of Bioorganic Phosphorus Chemistry Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 Key Laboratory of Bioorganic Phosphorus Chemistry Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 Department of Chemistry Capital Normal University Beijing 100037

　　Classical antifolates containing L-glutamic acid moiety in molecule have shortcomings such as drug resistance which is originated from the defective cell transport by mutation, and toxicity to the host which is due to unnecessarily long retention inside normal cells.[1] One strategy to overcome these shortcomings is to design nonclassical lipophilic inhibitors of folate requiring enzymes by deleting or modifying L-glutamic acid component from the folate analogues.……

关键词： Antitumor Activity drug resistance