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Progress in Chemistry 2004, No.04 Previous issue Next issue

In this issue:

Review
Preparation and Application of the Self-Assembled Monolayers
Zhai Yi,Zhang Jinli,Li Wei**,Wang Yiping
2004, 16 (04): 477- |
Published: 26 July 2004
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Abstract
The latest developments in the preparation techniques of self-assembled monolayers and their applications are reviewed in this article. The preparation techniques of new important self-assembled monolayer systems, silane/ hydroxylated surface system and thioalcohol/aurum system, and the applications of these systems in film preparation and molecular electronics are summarized.
Novel Microcapsule Fabricated by LbL Nano Self-Assembly
Liang Zhenpeng,Wang Chaoyang,Sun Qilong,Tong Zhen**
2004, 16 (04): 485- |
Published: 26 July 2004
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Abstract
The article focuses on a novel and versatile technique of layer-by-layer deposition (LbL), developed for preparing nano- or micro-capsules. The strategy outlined readily affords precise control over the size, composition, con-struction , shape and wall thickness of the hollow capsules. Consequently these capsules have potential applications in biochemistry, pharmacy, controlled-release, cosmetic and catalyst.
Fabrication of Photonic Band Gap Crystals through Colloid Self-Assembly Methods
Ding Jing,Chen Dong,Tang Fangqiong**
2004, 16 (04): 492- |
Published: 26 July 2004
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Abstract
Photonic band gap (PBG) crystals endow people the power to control and manipulate photons, but fabri-cation of photonic crystals, especially those that work at the near-infrared and visible wavelength is a hard work, requir-ing high-quality materials. hi this paper the PBG materials including semiconductors, metals, metal oxides, polymers, dyes and others are comprehensively reviewed from a standpoint of chemistry, meanwhile obtaining PBG crystals through these materials by self-assembly methods is recommended.
Hierarchical Self-Assembly of Inorganic Nanoparticles Mediated by Organic Macromolecules
Yuan Jianjun,Zhai Jin,Jiang Lei**
2004, 16 (04): 500- |
Published: 26 July 2004
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Abstract
The hierarchical self-assembly of inorganic nanoparticles mediated by the tailed organic macromolecules has been reviewed. The organic macromolecules used for the mediators include the synthetic polymers and the biopoly-mers. Up to now, the polymers with hydrogen-bond recognition functionality, polyelectrolytes, block copolymers and den-drimers have been developed as synthetic polymers for the assembly of the inorganic nanoparticles. At the same time, DNA, amylose and proteins also present the impressive ability for the ordered aggregation of inorganic nanoparticles. It is necessary for the hierarchical assembly of inorganic nanoparticles to modify them to afford their surfaces tailored function-ality , for example hydrogen-bond recognition groups, positive charges, negative charges, and so on, which can recognize with the organic mediators. This research field is very essential for the construction of advanced functional materials and biomimetic materials.
Advances in Fire-Retardant Inorganic Nanomaterials
Zhang Zejiang,Feng Liangrong,Qiu Fali,Lan Bin
2004, 16 (04): 508- |
Published: 26 July 2004
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Abstract
The preparation methods and fire-retardant properties of the fire-retardant nanomaterials such as antii trioxide, aluminum hydroxide, magnesium hydroxide and layered double hydroxides are reviewed. Applications o fire-retardant inorganic nanomaterials in polymer-inorganic fire-retardant nanocomposites are described. Their fire-i dant mechanism is summarized and the development trend and suggestions on the research of the fire-retardant materials are put forward.
Progress in Structural and Functional Study of Nanometer Protein Shell of the Ferritin
Wang Qunli,Kong Bo,Huang Heqing**
2004, 16 (04): 516- |
Published: 26 July 2004
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Abstract
Ferritins are ubiquitously distributed in organisms and take an important role in iron metabolism. In this paper, the subunit structure, heme electron tunnel, site of ferroxidase and trapping of various kinds of metal ions from the ferritin have been described. New development on structure and function of nanometer protein shell of ferritin is shown.
Shape-Controlled Syntheses of Metal Nanoparticles
Yu Yingtao,Zhang Qinhui,Xu Boqing**
2004, 16 (04): 520- |
Published: 26 July 2004
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Abstract
Nano-sized metal particles exhibit different thermal, electronic, magnetic and optical properties from those of bulk ones because of quantum size effect and so on. The properties of nanoparticles depend on not only the size but also the shape. Specially shaped nanoparticles generally have particular surface structures and properties. In recent years, shape-controlled synthesis of nanoparticles has been attractingmore and more attention. The progress has been made for the study on subgroup Ⅷ and IB metals. In this review, the syntheses of metal nanoparticles and methods of controlling the size and shape are introduced. Also, the recent investigations on the shape-controlled syntheses of nanoparticles are reported for Pt, Pd, Ni, Au, Ag, Cu and Co, respectively.
Progress and Application of Spectral Data Pretreatment and Wavelength Selection Methods in NIR Analytical Technique
Chu Xiaoli*,Yuan Hongfu,Lu Wanzhen
2004, 16 (04): 528- |
Published: 26 July 2004
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Abstract
In the past decade, near infrared spectral analysis technique (NIR) has been quickly developed and widely applied in virtue of the development of chemometrics, in which spectral data pretreatment and wavelength selection methods play an important role. In the paper,the typical and commonly used pretreatment and wavelength selection meth-ods are described. Some newly developed methods in this field such as orthogonal signal correction ( OSC) , net analyte signal(NAS),wavelet transform(WT), elimination of uninformative variables(UVE) and genetic algorithm(GA) methods are introduced in detail with 170 references. The algorithms and applications in NIR analysis of those methods are given and discussed.
Progress in Single-Cell Analysis by Capillary Electrophoresis
Xiao Yuxiu**,Feng Yuqi,Da Shilu,Yeung Edward S.
2004, 16 (04): 543- |
Published: 26 July 2004
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Abstract
The progress in single-cell analysis by capillary electrophoresis is reviewed. Preparation methods of cell suspension solution, techniques of single cell injection and cell lysis, separation mode of capillary electrophoresis, detec-tion methods and new applications are described in detail. Techniques of single cell injection and detection methods are emphasized. Future directions of single-cell analysis by capillary electrophoresis are also predicted.
Study of LiMPO4 as Cathode Material for Lithium Ion Batteries
Ni Jiangfeng,Su Guangyao*,Zhou Henghui*,Chen Jitao
2004, 16 (04): 554- |
Published: 26 July 2004
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Abstract
A new cathode material for Ii-ion battery, lithium iron phosphate is introduced. The research progress of preparation, modification and properties in IiFePO_4 is reviewed and the other LiMP0_4(M = Mn、Co、V)cathode materials are briefly described. The application prospects of LiMPO_4, are discussed.
Symmetry,Cage Structure of[60]Fullerene Derivatives and 13C NMR Spectroscopy
Liu Shuzhi,Tang Guangshi**
2004, 16 (04): 561- |
Published: 26 July 2004
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Abstract
The structure of all kinds of [60]fullerene derivatives and their characterization via (13)~C NMR spectros-copy are reviewed and the (13)~C NMR spectroscopic properties of various symmetry [60]fullerene derivatives are mainly dis-cussed . From the chemical shifts, the number and the relative intensity of resonances for [60]fullerene moiety, symmetry and addition pattern of [60]fullerene derivatives can be confirmed. For the C_s, C_(2v) and C_(3v) symmetry [60]fullerene de-rivatives , the relative chemical shift of the carbon atoms on the mirror planes depends greatly upon their distance from ad-dition position on the surface of [60]fullerene. So (13)~C NMR spectroscopy plays the important role in identification of the particular structure of [60]fullerene cage.
(Dynamic) Kinetic Resolution Reactions of Racemes Catalyzed by Lewis Acid and Base Catalysts
Zhang Zhanjin1,2,Mao Jincheng2,Wan Boshun2,Chen Huilin2
2004, 16 (04): 574- |
Published: 26 July 2004
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Abstract
The (dynamic) kinetic resolution of raceme is one of the important ways in the synthesis of chiral com-pounds. The reaction can be realized by enzymatic or non-enzymatic catalysis or by combination of two methods. The cat-alytic systems of Lewis acid and base are useful ways in the non-enzymatic catalysis. They were widely used to different kinds of (dynamic) kinetic resolution reactions. At present, mighty advances have been made in the field. Recent progress in the applications of non-enzymatic system about Lewis acid and base to (dynamic)kinetic resolution reactions of racemes is reviewed.
Progress in Synthesis of Mixed Alcohols from CO Hydrogenation
Li Debao,Ma Yugang,Qi Huijie,Li Wenhuai*,Sun Yuhan,Zhong Bing
2004, 16 (04): 584- |
Published: 26 July 2004
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Abstract
As the important content of Cl chemistry, the synthesis of mixed alcohols from syngas has attracted m and more attention due to the recent trends of its development. The progress of the mixed alcohols in the aspects of r applications of mixed alcohols, the catalyst systems, reaction mechanisms and synthesis processes is reviewed.
Progress in Direct Conversion of Methane
Wang Hua,Liu Zhongmin*
2004, 16 (04): 593- |
Published: 26 July 2004
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Abstract
The progress in direct conversion of methane to chemicals is reviewed. The partial oxidation of methane to methanol and formaldehyde, the oxidative coupling of methane to ethaene and ethylene, and the dehydro-aromatization of methane under non-oxidative conditions are discussed in detail.
Advances of Rhodium-Catalyzed Enantioselective Hydrogenation of Functional Olefins--The Thriving of Monodentate Phosphorous Ligands
Zeng Qingli1,2**,Mi Aiqiao3,Jiang Yaozhong3
2004, 16 (04): 603- |
Published: 26 July 2004
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Abstract
The whole historical progress in rhodium-catalyzed enantioselective hydrogenation of fuctional olefins is reviewed briefly. Specially, the recently thriving of monodentate phosphorous ligands is discussed in detail. A construc-tive prospect about the research is given.
Progress in Visible Light Responding Photocatalysts
Chen Songzhe**,Zhang Pengyi,Zhu Wanpeng,Liu Fudong
2004, 16 (04): 613- |
Published: 26 July 2004
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Abstract
The latest research progress in visible light responsible photocatalysts is reviewed. The principle, design idea, preparing method, effects and shortcomings of the concerned materials are discussed in detail.
Heteropoly Acids Catalysts and Their Application in the Synthesis of Fine Chemicals
Zhao Zhongkui,Li Zongshi*,Wang Guiiru,Qiao Weihong,Cheng Lvbo
2004, 16 (04): 620- |
Published: 26 July 2004
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Abstract
The progress of the structure, performance, synthesis and characterization of the environmentally benign heteropoly compounds and their use in fine chemicals are introduced in detail. The synthesis and application of the sup-ported heteropoly acids and the novel mixed heteropoly compounds obtained by designing molecule are also reviewed. The research for heteropoly acids (HPA) and their salts has a quite important theoretical value and realistic meanings. HPA used as excellent green catalyst will possess extensive application prospect in fine chemical synthesis.
Two-Photon Absorbed Organic Materials and Application in Three-Dimensional Digital Optical Data Storage
Ma Wenbo*,Wu Yiqun,Gu Donghong,Gan Fuxi
2004, 16 (04): 631- |
Published: 26 July 2004
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Abstract
The development of information technique requires that a data storage device must possess the character of ultra-high density, ultra-fast transfer rate and longer storage longevity. At present, the storage density of the most pop-ular optical data storage is reaching the physics limit. Because of its strong penetration and high, resolution, two-photon absorption can be applied to multi-layer optical data storage, and the bit density of which can reach as large as 10~(12) bits/ cm~3 . Now the key problem is to develop materials that have big two-photon absorption cross-sections. In this paper, progress in two-photon-absorbed organic materials is reviewed, and the new development of three-dimensional optical data storage based-on these materials is introduced.
Molecular Imprinting Polymers for Chiral Separation of Amino Acid Derivatives
Guo Tianying**,Zhang Liying,Hao Guangjie,Song Moudao,Zhang Banghua
2004, 16 (04): 638- |
Published: 26 July 2004
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Abstract
Molecular imprinting is a promising technique for the preparation of synthetic polymers of predetermined specificity. In this paper, the recognizing mechanism, preparation methods, and the applications of these polymers im-printed with amino acid derivatives are reviewed.
Progress in Chemical Modification of Chitin and Chitosan
Ma Ning,Wang Qin,Sun Shengling,Wang Aiqin*
2004, 16 (04): 643- |
Published: 26 July 2004
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Abstract
Chitosan, an amino polysaccharide obtained by deacetylation of chitin is the most abundant natural re-sources and widely distributed in the cuticle of the Crustacea. Recently chitin and chitosan have become of great interest not only as biopolymers, but also as a new functional materials of high potential in various fields ranging from a simple floccule for waste water treatment to medical materials such as for wound healing and prevention of infection. This review has a closer look at chemical modification of chitin and chitosan. Based on current research and existing products, some new and futuristic approaches in this fascinating area are thoroughly discussed.
Study on Organic-Inorganic Hybrid Membranes
Ai Xiaoli*,Hu Xiaoling
2004, 16 (04): 654- |
Published: 26 July 2004
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Abstract
Research of organic-inorganic hybrid membranes become the most interesting focus because they poccess both properties of organic and inorganic membranes: good permeability, selectivity, mechanical strength, thermal and chemical stability, etc. The preparation, structure of organic-inorganic hybrid membranes are reviewed and their applica-tions are discussed.
Consideration on the Development Strategy of Bioinorganic Chemistry in China
Mao Zongwan,An Yan,Ji Liangnian*
2004, 16 (04): 660- |
Published: 26 July 2004
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Abstract
Development history and recent hot fields of bioinorganic chemistry internationally and achievements by Chinese scientists in this field are briefly reviewed. Future strategy for development of bioinorganic chemistry in China is discussed.
Trends in the Studies of Cellular Inorganic Chemistry
Yang Pin*,Xue Shaowu
2004, 16 (04): 667- |
Published: 26 July 2004
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Abstract
Some trends in the studies of cellular inorganic chemistry have been described in this review, which ma-inly contains the aspects of effects of metal ions including calcium ions and lanthanide ions and activated small molecule on ion channels, receptor proteins in the membrane, intracellular receptor proteins and cellular function.