检索结果-南通市图书馆

Chinese Chemical Letters 2013年第6期24卷 450-452页

作者： Hong-Yu Guo fa-fu yang Zi-Yu Jiao Jian-Rong Lin College of Chemistry and Chemical Engineering Fujian Normal University fujian Key Laboratory of Polymer Materials Fujian Normal University

Using a click reaction between alkynylthiacalix[4]arene and ethyl 2-azidoacetate followed by an ammonolysis with ethanolamine,leucinol and hydrazine hydrate,respectively,three novel thiacalix [4]arene derivatives 4,5 and 6 with triazolyl and hydrogen bonding groups（NH and OH） were synthesized in high *** exhibited excellent extraction capability for six anionic and cationic *** flexible cavity,π-triazole rings and hydrogen bonding groups all play crucial roles in dye complexation.

关键词： Thiacalixarene Synthesis Click chemistry Dye extraction

Thiacalix[4]arene 1,2,3-triazole-polyethylene glycol polymers:Synthesis and dye adsorption properties

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2015年第9期26卷 1091-1095页

作者： Shu-Yun Zhu Hong-Yu Guo fa-fu yang Zu-Sheng Wang College of Chemistry and Chemical Engineering Fujian Normal University fujian Key Laboratory of Polymer Materials Fujian Normal University

By reacting alkynylthiacalix[4]arenes with polyethylene glycol azido compounds,a series of novel thiacalix[4]arene 1,2,3-triazole-polyethylene glycol netty polymers were conveniently prepared in good *** structures and morphologies were studied by ^1H NMR,*** elemental analysis and SEM *** average,approximately 28-31 thiacalixarene units exist in each polymeric *** novel polymers possess excellent adsorption ability for both cationic and anionic *** saturation adsorption capacity for Congo red reached 1.3-1.4 mmol/*** exhibit high and stable adsorption ability in the scope of pH 5-9,and maintain good properties in five cycles.

关键词： Thiacalixarene Synthesis Polymer Dye adsorption

Synthesis of novel redox calix[4]arene derivative with 1,3-substituted large conjugated ferrocene bridge

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 1039-1041页

作者： Bi Qiong Hong fa fu yang Hong Yu Guo Yan Hua Wang Xian Feng Chai College of Chemistry and Materials Fufian Normal University Fuzhou 350007 China

A novel redox calix[4]arene derivative with 1,3-substituted large conjugated ferrocene bridge was designed and synthesized in high yield. Its structure was characterized by element analysis, IR, ESI-MS, NMR spectrum, etc. The primary study of cyclic voltammetry showed it possessed excellent reversible electrochemistry response property. 2009 fa fu yang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Calixarene Ferrocene Synthesis Cyclic voltammetry

Synthesis and Complexation Properties of Novel Biscalixarene Composed of Calix[4]arene and Thiacalix[4]arene Subunits

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2006年第8期17卷 1029-1032页

作者： fa fu yang Xia ZHAO Cui Yu HUANG Hong Yu GUO Si Ning ZHENG Qi PENG College of Chemistry and Materials Fujian Normal University Fuzhou 350007 State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter China Academy of Science Fuzhou 350002

The first example of biscalixarene composed of calix[4]arene and thiacalix[4]arene subunits 3 was facilely synthesized and showed good complexation properties for metal cations and zwitterionic α-amino acids.

关键词： Biscalixarene thiacalixarene complexation cation amino acid.

Synthesis of novel biscalixarene-tube containing two kinds of calix[4]arene derivative units

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2008年第1期19卷 9-11页

作者： fa fu yang Li M ing Liu Chao Hui Liu Xi-ao Hua Zheng Yu Guo College of Chemistry and Materials Fujian Normal University Fuzhou 350007 China

A novel biscalixarene with two kinds of calix[4]arene derivative units connected by four bridging chains, was facilely＇ synthesized by ＂1 ＋ 1＂ condensation mode in high yield. The element analyses, ESI-MS, ^1H NMR and ^1H-^1H COSY spectrum showed that the calix[4]arene units of compound 4 were in cone conformations and compound 4 possessed biscalixarene-tube structure. 2007 fa fu yang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Biscalixarene Tube Synthesis ^1H-^1H COSY

De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal [3 + 2] annulation

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期 174-180页

作者： fan-Xiao Meng Xing-Yu Wang Ka Lu Ju-Song yang fu-Min Zhang Ai-Jun Ma Bao Du Yong-Qiang Tu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University School of Biotechnology and Health Sciences Wuyi University

Herein, the de novo synthesis of atropisomeric benzofurans through the Cu/spirocyclic-pyrrolidine-oxazoline(SPDO) complex catalyze asymmetric formal [3 + 2] cycloaddition between quinones and ynamides is explored, producing a range of structurally diverse axially chiral benzofurans in satisfactory yields with good to excellent enantioselectivities. furthermore, density functional theory calculations were applied to explain the possible reaction mechanism.

关键词：

同方期刊数据库

A comparative study of piezoelectric unimorph and multilayer actuators as stiffness sensors via contact resonance

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2016年第4期32卷 633-639页

作者： Ji fu fa-Xin Li State Key Laboratory for Turbulence and Complex System College of Engineering Peking University

Piezoelectric bar-shaped resonators were proposed to act as hardness sensors in the 1960 s and stiffness sensors in the 1990 s based on the contact impedance *** this work, we point out that both multilayer and unimorph（or bimorph） piezoelectric actuators could act as stiffness/modulus sensors based on the principle of mechanical contact resonance. First, the practical design and the performance of a piezoelectric unimorph actuator–based stiffness sensor were presented. Then the working principle of piezoelectric multilayer actuator–based stiffness sensors was given and verified by numerical investigation. It was found that for these two types of resonance-based sensors, the shift of the resonance frequency due to contact is always positive, which is different from that of the contact impedance method. further comparative sensitivity study indicated that the unimorph actuator–based stiffness sensor is very suitable for measurement on soft materials, whereas the multilayer actuator–based sensor is more suitable for hard materials.

关键词： piezoelectric stiffness multilayer actuator modulus hardness impedance shaped diamond verified

A thermodynamic model for predicting activity of CaO-SiO_(2)-Al_(2)O_(3)-MgO-TiO_(2)-V_(2)O_(3)-FeO slags during electric furnace smelting process

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2024年第9期31卷 2156-2172页

作者： Jian-fa Jing Shuai Wang Yu-feng Guo Feng Chen Ling-zhi yang Jian-feng yang fu-chun Xu School of Minerals Processing and Bioengineering Central South UniversityChangsha410083HunanChina

To optimize the comprehensive utilization of vanadium titanomagnetite by direct reduction-smelting processes,it is essential to acquire titanium slag with a higher TiO_(2)content of 45–60 wt.%.A thermodynamic model was developed based on the ion and molecule coexistence theory,specifically targeting the CaO–SiO_(2)–Al_(2)O_(3)–MgO–TiO_(2)–V_(2)O_(3)–FeO slag *** impact of slag composition on the smelting of vanadium titanomagnetite was assessed,and the thermodynamic model was utilized to identify the optimal high-titanium *** results revealed that increasing the basicity,MgO content,and FeO content within the slag effectively suppressed the reduction of titanium and silicon ***,the calculated activity coefficient of TiO_(2)decreased with higher basicity,MgO,and FeO *** an increase in basicity significantly enhanced the reduction of vanadium oxides,the effects of MgO and FeO contents on vanadium oxide reduction were comparatively less ***,higher basicity and FeO content promoted the formation of calcium titanates,whereas an elevated MgO content favored the formation of magnesium *** smelting results indicated that a lower V_(2)O_(3)content and higher TiO_(2)activity corresponded to a smaller titanium mass fraction in the iron alloy,while the opposite trend was observed for vanadium.

关键词： Vanadium titanomagnetite Titanium slag Vanadium Ion and molecule coexistence theory

Effects of phase change material(PCM)-based nanocomposite additives on thermal decomposition and burning characteristic of high energy propellants containing RDX

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

Defence Technology（防务技术） 2022年第4期18卷 557-566页

作者： En-fa fu Na Sun Zheng-gang Xiao Key Laboratory of Special Energy Materials Ministry of Education School of Chemical Engineering Nanjing University of Science and Technology

A kind of phase change material(PCM)-based nanocomposite was prepared and added into high energy propellants containing RDX as additives to investigate its effect on thermal decomposition and burning characteristic of high energy *** effect of PCM-based nanocomposites on thermal decomposition of high energy propellants is investigated by TG/DSC-FTIR-MS *** to the delayed protection effect(PCM-based nanocomposites can absorb lots of heat at the range of certain temperature when it undergoes structure change or phase transitions)of PCM-based nanocomposites under the thermal decomposition condition,the thermal stability of high energy propellants modified with PCMbased nanocomposites is *** the same time,the concentration of N2,NO2,H2O and CO_(2)is increased during thermal decomposition of high energy propellants whereas NO and CO is *** burning gaseous products and burning characteristic of high energy propellants are studied by the combination of closed bomb test and Fourier transform infrared *** main burning gaseous products are N2,CO_(2),CO,H2O,CH4,*** the high energy propellant modified with PCM-based nanocomposites,the concentration of CH4is increased while CO,CO_(2) and H2O is decreased under the high-pressure burning *** progressivity factor of high energy propellants is increased by22.2%compared with the control sample while the maximum pressure is merely decreased 1.25%after the addition of the PCM-based nanocomposite,thus PCM-based nanocomposites can be used to adjust the burning process and improve the burning progressivity of high energy *** study is expected to boost the practical application of PCM-based nanocomposite to the propellant formulation and effectively control the burning characteristic of high energy propellants.

关键词： Phase change material Propellants Nanocomposite Thermal decomposition Burning

Syntheses and Binding Properties of Novel Calix[4]arene Derivatives Containing Multiple Azo-groups

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2005年第5期21卷 630-633页

作者： yang fa-fu CAI Xiu-qin GUO Hong-yu CHEN Xi-lei College of Chemistry and Materials Science Fujian Normal University Fuzhou 350007 P. R. China

Calixarenes are excellent scaffolds that can De modified by introducing various functional groups to create specific interactions between the host and guest molecules. Thus, many calixarene derivatives containing special functional groups, such as ester, amide and thiourea, have been synthesized and their excellent complexing capability for cations have also been studled. Lately, calixarene derivatives containing two or more sorts of functional groups have attracted much attention.

关键词： Calix arene Amide Shift-base Extraction Selectivity