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Progress in Chemistry 2002, No.01 Previous issue Next issue

In this issue:

Review
Synthesis of Silica Molecular Sieves and Their Use in Fine Chemicals
Gong Yanjun,Wu Dong,Sun Yuhan**
2002, 14 (01): 1- |
Published: 24 January 2002
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Abstract
The progress of synthesis of zeolite and mesoporous materials and their use in fine chemicals are reviewed. The properties and preparation methods of modified mesoporous silicas, especially the organically functionalized mesoporous materials as solid catalysts in organic reactions are introduced in detail.
Application of Chiral Metal-Salen Complexes in Asymmetric Catalysis
Sun Wei,Xia Chungu
2002, 14 (01): 8- |
Published: 24 January 2002
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Abstract
hiral metalsalen complexes have been recognized as one of the most promising catalysts for various asymmetric reactions. This review summarizes the applications of soluble and solid-phase supported chiral metalsalen complexes in asymmetric reactions.
Advances in Molecular Organic Electroluminescent Materials
Zhu Weihong,Tian He**,Zhu Shiqin
2002, 14 (01): 18- |
Published: 24 January 2002
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Abstract
Organic elctroluminescent (EL) devices are of both academic and industrial interest due to its potential application in display technology. The advantages of organic materials over inorganic materials are high fluorescent efficiency, wide selection of colors and the easiness in the fabrication of large films. This paper summarizes the progress of the molecular organic EL materials, especially highlighting the oligomer and carrier-transporting emitters.
Laser Thermal Lens Spectrometry
Han Quan,Yan Hongtao
2002, 14 (01): 24- |
Published: 24 January 2002
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Abstract
Thermal lens spectrometry is a photothermal technique developed in 1980s. It has attracted much attentions because of its extremely high sensitivity, low detect limit and the capability of making measurements on micro samples. This review considers the development of thermal lens spectrometry after 1990 in terms of instrument developments, theoretical treatments and practical applications.
Application of Subcritical Water Extraction in Analytical Chemistry
Wu Renming
2002, 14 (01): 32- |
Published: 24 January 2002
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Abstract
At ambient temperature and pressure water has a dielectric constantε = 80. However, I he dielectric constant of subcritical water can be lowerd by raising the temperature of the water under moderate pressure. Subcritical water at 250 ℃ and 5 MPa hasε = 27,which is similar to those of ethanol (ε = 24) and methanol (ε = 33). Thus,the solubilities of low polarity organics such as PAHs and PCBs can be increased by heating the water under moderate pressure. Furthermore,subcritical water has been shown to be a feasible medium polarity replacement for methanol-water or acetonitrile-water mixture as an eluent for reversed-phase HPLC.
Advances in Biomolecular Computing
Shao Xueguang**,Jiang Haiyan,Cai Wensheng
2002, 14 (01): 37- |
Published: 24 January 2002
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Abstract
Due to the high parallelism and recognition ability of the biomolecules in biochemical reactions, biomolecular computing behaves great advantage in solving combinatorial optimization problems. Biomolecular computing has been successfully applied in computing NP complete problems such as Hamiltonion path problem, maximal clique problem and SAT problems in Boolean calculation, etc. This paper presents a review of fundamental ideas, computing methods, applications and advances in biomolecular computing. Furthermore, the developmental trend of biomolecular computing is described.
The Research Progress of Ni-containing Enzymes and Model Compounds
Dai Yan,Cheng Peng
2002, 14 (01): 47- |
Published: 24 January 2002
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Abstract
The known Ni-containing enzymes include urease, hydrogenase, carbon monoxide dehydrogenases/acetyl coenzyme A synthases, methyl coenzyme M reductases and superoxide dimutuses. The knowledge of the structure, function and model compounds of the Ni-containing enzymes is briefly overviewed in this paper.
Recent Development in the Selective Oxidation of Light Alkanes by Oxidant CO2
Zhang Fazhi,Xu Boqing
2002, 14 (01): 56- |
Published: 24 January 2002
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Abstract
Recent advances in the selective oxidation of alkanes by using CO2 as the oxidant were reviewed. The subjects included in this articles are the CO2 reforming of methane to syngas, the oxidative coupling of methane to ethylene and ethane byCO2 oxidative dehydrogenation and aromatization of light alkanes by CO2. Discussion is focused on the role of CO2 in the selective oxidative reactions and the related mechanisms.
Metal β-Diketonates Used as Precursors for Ferroelectric Oxide Thin Films
Xu Xiaohong,Hou Yun,Wang Min,Wang Hong,Zhou Aiqiu
2002, 14 (01): 61- |
Published: 24 January 2002
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Abstract
The preparation of volatile metalβ-diketonates used as precursors for deposition of the ferroelectric oxide thin films is reviewed. The structures and properties of them are presented and discussed. The use of them in metal organic vapor deposition of ferroelectric oxide thin films is also discussed.
Progress in Piezoelectric Quartz Crystal Sensors
Chen Lingxin,Guan Yafeng,Yang Bingcheng,Shen Dazhong
2002, 14 (01): 68- |
Published: 24 January 2002
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Abstract
The fundamental principle of the piezoelectric sensors and the analytical methods based on mass, viscosity, electric conductivity in solution are briefly introduced. A review on electrochemical quartz crystal microbalance (EQCM) and piezoelectric biosensors is presented in detail. New progress in series piezoelectric sensor (SPQC), series surface acoustic wave sensor (SAW) and electric-separated piezoelectric sensor (ESPS), which have a great potential in further development both in theory and application, is also described concisely.