Table of Content

23 May 2005, Volume 23 Issue 3

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Miscrostructure and Photoelectrical Performance of Titanium Oxide Film Prepared by In-Situ Oxidation on TiNi Alloy Surface

WANG Gai-tian, TU Jiang-ping, ZHANG Wen-kui, ZHANG Bo, YUAN Yong-feng, HUANG Hui, GAN Yong-ping

2005, 23(3):  161-166.  DOI: 10.7517/j.issn.1674-0475.2005.03.161

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The preparation, structure and photoelectric properties of titanium oxide films formed by in-situ direct thermally oxidation of TiNi alloys were investigated by AFM,XRD, EDS and photocurrent response. The results showed that the films is rutile TiO₂, and its crystal orentation is dependent on the thermal oxidation temperature. With increasing the oxidation temperature, the photocurrent and open-circuit voltage of TiO₂/TiNi electrode first increased, and then decreased. when the oxidation temperature was 700 ℃, the photocurrent of TiO₂/TiNi electrode was the highest.

Synthesis of New Types Photochromic Dithienylethenes and Investigation on their Properties

LI Gui-zhen, PU Shou-zhi, XU Jing-kun, SHEN Liang, XIAO Qiang, CHEN Bing, ZHAO Ji-quan

2005, 23(3):  167-174.  DOI: 10.7517/j.issn.1674-0475.2005.03.167

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Two novel photochromic dithienylethenes compounds, 1,2-bis[2-methyl-5-(4-ethoxyphenyl)-3-thienyl]fluorocyclopentene (1a) and 1,2-bis[2-methyl-5-(4-ethoxyphenyl)-3-thienyl]fluorocyclopentene (2a) were synthesized, and their UV-Vis absorption spectra, fluorescent properties and photochromic dynamics character were studied in different solvents and concentrations. The results indicate that they have not only shown good photochromic behavior and strong fluorescent properties, but also their cyclization reactions are zeroth order reaction and cycloreversion reactions are first order reaction.

The Study of Aggregation Properties of Sodium Alkyl Benzenensulfonate

SHI Fu-qiang, ZHANG Lu, ZHAO Sui, AN Jing-yi, YU Jia-yong

2005, 23(3):  175-182.  DOI: 10.7517/j.issn.1674-0475.2005.03.175

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Critical micelle concentration (CMC), aggregation numbers and micropolarity of four sodium branched-alkyl benzene sulfonates were determined by steady-state fluorescence probe method in which pyrene was used as fluorescence probe and benzophenone was used as quencher. The comparison was performed between the CMC results obtained by steady-state fluorescence probe method and that obtained by surface tension method. The Mulliken charge distributions were computed at HF level with 6-31G^* basis set.

A Study on the ATRP Polymerization Initiated by a New Kind of Cu(Ⅰ) Complex

YUE Ling, ZHOU Jian-hua, HU Chun-yan, ZHOU Li-li, ZHANG Xiao-hong, WU Shi-kang

2005, 23(3):  183-189.  DOI: 10.7517/j.issn.1674-0475.2005.03.183

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The 2,6-bis(2-benzimidazolyl) pyridine as a tridentate ligand for the Cu(Ⅰ) complex formation used in the initiation system of ATRP has been studied in this work. The complex obtained possesses favorable catalytic activity for the initiation of polymerization in which the ATRP characteristic is evident. Compared with the rate of polymerization initiated from Cu(Ⅰ) complex composed of different ligands with various amines, obtained results are consistent with the known order as follows: alkyl amine≈pyridind>imine>aryl amine.

A New Image Motion Detection Method forthe Airborne Vision Stable System

ZHANG Gang, YAN Lei, ZHAO Hong-ying

2005, 23(3):  190-196.  DOI: 10.7517/j.issn.1674-0475.2005.03.190

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A novel method of image motion detection is presented for airborne vision stable system in this paper. The image motion is obtained by the gray project and then the motion data is accurately detected by the grid detection and bit plane match method. With auto-fit gray divided level selection and gray project,the calculation amount can be greatly reduced. The experiments show that the method has good perform in real time and image adaptability.

Study on the Hydrophobic Association Properties of Hydrophobically Modified Polyacrylamide

WANG Dong-xian, WANG Lin, GONG Qing-tao, LIAO Lin, ZHANG Lu, JING Zhi-qiang, HUANG Yu-ping, YAN Feng, ZHAO Sui, YU Jia-yong

2005, 23(3):  197-202.  DOI: 10.7517/j.issn.1674-0475.2005.03.197

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A hydrophobically modified polyacrylamide P(AM/2-EHA) was synthesized. By means of viscosity measurements, fluorescence, UV spectra, and SEM, the hydrophobic association properties of P (AM/2-EHA) in aqueous solution were studied. The results show that with the increase of P (AM/2-EHA) concentration, hydrophobic domain, super-molecular aggregate and even space network structure can be formed in the solution by the hydrophobic association of P (AM/2-EHA). And SEM analysis verified the formation of network microstructure.

The Study of the Interaction Between Ca²⁺ and SDBS by Steady-State Fluorescence

LIAO Lin, ZHANG Lu, ZHAO Sui, YU Jia-yong

2005, 23(3):  203-208.  DOI: 10.7517/j.issn.1674-0475.2005.03.203

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The interaction between Ca²⁺ and SDBS was studied by steady-state fluorescence probe method in which pyrene was used as the fluorescence probe and the result was compared with that obtained by light transmission method. It was found that if added pyrene directly into Ca²⁺-SDBS system, the abrupt change of ratio I₁/I₃ was very close to the onset on which precipitate formed. When pyrene was added into the supernatant after centrifugation, the abrupt change of ratio I₁/I₃ corresponded to the point at which the precipitate began to redissolve. It was also found that the micropolarity sensed by pyrene probe decreased with the addition of salts. And the bivalent counterion Ca²⁺ influenced the micelle stronger than the monovalent counterion Na⁺.

The Photochemistry Properties on Reactions of Amino Acids and Silver

XIAO Zi-dan, ZHANG Chao-ping, SHEN De-jun

2005, 23(3):  209-217.  DOI: 10.7517/j.issn.1674-0475.2005.03.209

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The reaction of amino acids and silver is a thermal spontaneous process without additional energy. But when light introduced into the system the reaction speed will be changed. According to our research, the order of light intensity when absorption at Soret-band found is as follows: Asp-Ag(Ⅰ)>Thr-Ag(Ⅰ)>Tyr-Ag(Ⅰ)>Lys-Ag(Ⅰ). For Cys-Ag system, the reactions between oxygen of α-carboxyl group and nitrogen of α-amino group with silver(Ⅰ) ion were promoted by lighting. But the reaction of S atom and silver (Ⅰ) ion was no relations with light intensity. These processes are light-assistance reactions.

Photoelectron Behaviors of Silver Halide Microcrystals

LIU Ji, ZHOU Tao, YUE Jun

2005, 23(3):  218-231.  DOI: 10.7517/j.issn.1674-0475.2005.03.218

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Photoelectron behavior of silver halide emulsion grains is an important factor influencing photosensitivity. In the present paper, research methods, photoelectron creation and decay, photoelectron traps, the influence of intrinsic and extrinsic traps for electrons on their lifetimes and decay processes, and the relationship of photoelectron behavior with other physical properties were reviewed.

Novel Inherently Conducting Polymer Acting as Antistatics

XU Jing-kun, HU Xiu-jie, PU Shou-zhi, SHEN Liang, CHEN Ping

2005, 23(3):  232-238.  DOI: 10.7517/j.issn.1674-0475.2005.03.232

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Among the antistatic coatings, inherently conducting polymer films were found to be one of the most useful. In this paper, the application of inherently conducting polymers in antistatic coating, such as polythiophenes and polyaniline, have been briefly reviewed, including their conducting mechanism, their characteristics and their development. The special notice was focused on poly (3,4-ethylenedioxythiophene)/polystyrene sulfonic acid, which succeeded in photographic materials as antistatic coating in the past decade.