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Progress in Chemistry 2003, No.03 Previous issue Next issue

In this issue:

Review
Single-Molecular Magnets and Their Magnetic Characterization
Wang Qinglun,Liao Daizheng**
2003, 15 (03): 161- |
Published: 24 May 2003
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Abstract
The studies on single-molecular magnets (SMM's) are in the interface between molecule-based magnets and nanoscale magnetic materials. Study of their unusual magnetic behavior will be not only beneficial for both physics and chemistry, but also potentially used in high-density information storage devices for quantum computing. In this paper, several kinds of SMM's and their magnetic characterization are reviewed.
Development and Prospect in the Fundamental Research on the Decomposition of Supersaturated Sodium Aluminate Solution
Li Jie**,Chen Qiyuan,Yin Zhoulan,Zhang Pingmin
2003, 15 (03): 170- |
Published: 24 May 2003
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Abstract
Decomposition of supersaturated sodium aluminate solution is one of the most important procedures in the production of alumina. In this paper, the current research status on structural characteristics and decomposition mechanism of supersaturated sodium aluminate solution are reviewed. The basic structure of aluminate ions is summarized and the influence of concentration, caustic ratio and alkali metals on the structure is analyzed. The exploration about growth units of aluminum hydroxide precipitating from caustic aluminate solution as well as the decomposition mechanism are all remarked. Considering the enhancement of alumina production process, key research topics about the structural characters and decomposition mechanism of supersaturated sodium aluminate solution are put forward.
Supramolecular Fluorescence/Phosphorescence Sensors Used for Metal Ions Recognition
Wang Yu,Jin Weijun**
2003, 15 (03): 178- |
Published: 24 May 2003
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Abstract
The latest research progress in supramolecular fluorescence /phosphorescence sensors and switches used for metal cation recognition is summarized. Two types of systems were reviewed: photo-induced electron transfer and monomer-excimer systems.
Progress in Ugi Reaction
Ma Ning,Li Zhengming*,Zhao Weiguang
2003, 15 (03): 186- |
Published: 24 May 2003
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Abstract
Ugi reaction is an important reaction used in combinatorial chemistry. The development and applications of this reaction in recent years were reviewed on three aspects: (1) Variation of four components, including aldehyde (ketone), amine, acid and isocyanide, especially variation of the isocyanide and use of bifunctional compounds; (2) Ugi reaction for more than four components; (3) Applications of Ugi reaction in the synthetic process of some natural and drug-like compounds.
Application of the Combinatorial Chemistry to Research of the Natural Products
Zhang Cheng*,Li Weizhang,Yun Liuhong
2003, 15 (03): 194- |
Published: 24 May 2003
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Abstract
Natural products are one of the most important sources of the lead compounds in drug discovery. Combinatorial chemistry is now playing important role in the research of the natural products. In recent years, a number of molecular libraries have been designed and synthesized based on natural templates and they will provide a useful method for the development of the drug research based on the natural products.
Progress in Enantioselective Hydrogenation on Heterogeneous Catalysts
Li Xiaohong,Li Can**
2003, 15 (03): 204- |
Published: 24 May 2003
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Abstract
The research progress in enantioselective hydrogenation catalyzed by heterogeneous catalysts is reviewed. Two typical examples, asymmetric hydrogenation of α,β-ketoesters on nickel catalysts modified with tartaric acid derivatives and on platinum catalysts modified with cinchona alkaloids are introduced and discussed in detail. The prospect for enantioselective hydrogenation on heterogeneous catalysts is also proposed.
Studies of Producing Acetic Acid by Carbonylation of Methanol
Wang Yuhe,He Dehua,Xu Boqing*
2003, 15 (03): 215- |
Published: 24 May 2003
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Abstract
The Monsanto process for the carbonylation of methanol to acetic acid has many advantages such as high conversion of reactants and high yield of the product, but the disadvantages are also apparent, which include the high cost of the catalyst (rhodium) and the severe corrosion to equipment by the co-catalyst iodide. The improvement of Monsanto's technology, the Ir-based catalyst of BP (CativaTM technology) and especially the catalytic mechanism are reviewed. In addition, the advantages and disadvantages of different catalytic systems and the progress tendencies of those systems in the future are also introduced.
Room Temperature Ionic Liquids and Their Applications in Catalysis and Organic Reactions
Gu Yanlong,Peng Jiajian,Qiao Kun,Yang Hongzhou,Shi Feng,Deng Youquan*
2003, 15 (03): 222- |
Published: 24 May 2003
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Abstract
The preparation, properties of room temperature ionic liquids and theirs applications in catalysis and organic reactions are reviewed.
Progress in Research of the Catalysts for High Temperature Combustion of Methane
Wang Junwei,Tian Zhijian**,Xu Jinguang,Xu Yunpeng,Xu Zhusheng,Lin Liwu
2003, 15 (03): 242- |
Published: 24 May 2003
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Abstract
This paper describes the recent research progress of the catalysts for high temperature combustion of methane. The studies on several representative catalysis systems, especially the hexaaluminate catalysts are reviewed. Structures and preparation methods of the catalysts based on noble metals, perovskites and hexaaluminates are summarized and assessed. Several suggestions on preparing hexaaluminate catalysts are presented.