Table of Content

23 March 2009, Volume 27 Issue 2

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Preparation,Properties and Application of Triazinyl Derivatives as Photo-Acid Generator for 405 nm Imaging System

LIU Ling, WANG Wen-guang, WANG Mei-li, ZHANG Wei-min, PU Jia-ling

2009, 27(2):  81-86.  DOI: 10.7517/j.issn.1674-0475.2009.02.81

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Five triazinyl derivatives substituted by trichloromethyl were synthesized as photo-acid generator.Their structures were confirmed by 1HNMR and IR.Their thermal decomposition was detected by TG.Their UV-vis absorption spectra of the photo-acid generators were measured.Their photo-decomposition and acid-forming performance in acetonitrile under irradiation at 405 and 365 nm were evaluated.Imaging experimental results indicate that they could be applied to imaging system for violet laser at 405 nm.

Silicon Nanowire Arrays as Electrochemical Biosensors for Cytochrome c

YANG Kun, CHEN Huan, ZHAO Wen-chao, WANG Jian-tao, WANG Hui, ZHANG Xiao-hong

2009, 27(2):  87-94.  DOI: 10.7517/j.issn.1674-0475.2009.02.87

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The direct electrochemical biosensor for cytochrome c based on the silicon nanowire arrays was fabricated.The silicon nanowire arrays were prepared from the etched silicon wafer,which were then treated with aqua regia and HF to remove the cladding silicon oxide sheath.The modified silicon nanowire arrays were further used as the electrode for fabricating the direct electrochemical biosensors for the detection of cytochrome c,which exhibited linear response to cytochrome c at low concentration and high sensitivity of 2.75 μA·mmol^-1·L due to the vast surface-to-bulk ratio of the silicon nanowire arrays and the interaction between the carboxyl group of cytochrome and Si-H group provided by the surface of the modified silicon nanowire arrays.

Synthesis and Characterization of a New h-Line Sensitive o-Nitrobenzyl Carbamate Photobase Generator

LIU Jin-gang, Mitsuru Ueda

2009, 27(2):  95-102.  DOI: 10.7517/j.issn.1674-0475.2009.02.95

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A new photobase generator (PBG),N-{[ (2-nitro-5-piperidinylbenzyl)oxy]-carbonyl}-2,6-dimethylpiperidine (PNCDP) was designed and synthesized.The chemical structure was identified by FT-IR,NMR,and elemental analysis.PNCDP exhibited the maximum absorbance wavelength of 395.5 nm by UV-Vis measurement,which was 52.5 nm longer than that of the conventional PBG N-{[ (2-nitro-4,5-dimethoxybenzylpiperidinyl)oxy]carbonyl}-2,6-dimethyl-piperidine (DNCDP).Preliminary photolithography test showed that the PNCDP showed good sensitivity upon irradiation at h-line (405 nm) of high-pressure mercury lamp.

Holographic Performance of Fluorinated Acrylate Photopolymer

LI Fang, ZHU Zong-wen, WANG Yue-chuan

2009, 27(2):  103-110.  DOI: 10.7517/j.issn.1674-0475.2009.02.103

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By enhancing the diffusion of monomer,and by increasing the difference of refractive index between the recording monomer and the binder resin,modulation of refractive index of photopolymer for holographic recording will be greatly realized.Hyperbranched polyester (refractive index 1.586),with the loosely packing molecular structure that makes the monomer transport easily,and fluorine-containing acrylate (refractive index 1.372) combining with highly reactive diacrylate (refractive index 1.457) were used in this work as the binders and monomer,respectively,of photopolymer for holographic recording.The effects of composition and film thickness on diffraction efficiency of holographic recording were studied,as well as the characteristic space resolution and refractive-index modulation of the new holographic recording material.The photopolymer exhibited excellent performance of holographic recording with modulation of refractive index about 4.82×10^-3,photosensitivity 56 mJ/cm²,diffraction efficiency up to 99.4%,and 85.6% even at resolution as high as to 3754 lp/mm.

The Influence of 4-Hydroxy-6-Methyl-1,3,3a,7-Tetraazaindene on the Photographic Performances of Photothermographic Material Based on Silver Benzotriazole

LI Qiu-yan, LI Jin-pei

2009, 27(2):  111-120.  DOI: 10.7517/j.issn.1674-0475.2009.02.111

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The influences of 4-hydroxy-6-methyl-1,3,3a,7tetraazaindene sodium (NaTAI)on the photographic performaces of photothermographic (PTG) material based on silver Benzotriazole (AgBTA) were studied.It is found that NaTAI can remarkably increase the photographic speed of the PTG materials without much fog elevation.According to the measurements of the decay of Dember photovoltage,together with pH,pAg,and UV-Vis spectra,the sensitization of NaTAI is attributed to the reduce of interstitial silver ions in the silver halide grain,which results in elevation of latent image formation efficiency.

Characteristic of PVA Resins Esterified with Anhydride as Binders Used in the Negative PS Plate

KUANG Liang-ju, ZOU Ying-quan, YANG Xing-xing

2009, 27(2):  121-127.  DOI: 10.7517/j.issn.1674-0475.2009.02.121

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Modified polyvinyl alcohols (PVA) were synthesized by condensation reaction of PVA with butyraldehyde and then by the esterification reaction with acid anhydride.They were applied to photosensitive composition of negative presensitized plate (PS plate) composed with binder,diazo resin,background dyes and organic solvents.The composition and the imaging performance were studied.The result indicated that modified PVA resin had decisive effect on developability,ink receptivity and scratch resistance and also had strong influence on shelf life and photosensitivity.In addition,when the modified PVA resins fulfilled requirements in the following: 1) the acetalization degree varied from 60 mol% to 80 mol%, 2) the esterification degree varied from 10 mol% to 20 mol%, 3) the amount of hydroxyl group was 5-25 mol%, 4) the range of value of B/P (the mass ratio of the binder to diazo resin) was from 4 to 4.5, 5) the range of its molecular weight was from 4×10⁵ to 8×10⁵,the negative PS plate obtained had excellent sensitivity,hydrophobic property,good developability,good ink receptivity and good scratch resistance.

Visual-Uniformity Analysis of CIECAM02 Color Appearance Model Optimization

LIU Zhen, MENG Fan-ya, XIE Xian-ting

2009, 27(2):  128-134.  DOI: 10.7517/j.issn.1674-0475.2009.02.128

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In Windows Vista operating system,a new WCS Color Management System(CMS) is released to replace the original ICC CMS.One of the core technologies of the new CMS is that the CIECAM02 color appearance model is used to substitute the CIELAB color model of the ICC CMS,so the parameters such as surrounding,illuminant and other factors are included in the calculation of the color transformation and reproduction,By this way the correct transformation and reproduction of the color measured values is converted to the correct transformation and reproduction of the color vision effects in the color communication between the different media and equipments.But it is proved that the CIECAM02 is not an ideal visual uniformity color space which affects the correct calculation of the color conversion between the media or equipments.Firstly,the partial visual uniformity of the CIECAM02 is revised using the four international universal Color Difference Datasets(BFD,Leeds,RIT-DuPont and Witt),and the lightness which is revised by Witt data and chroma which is revised by Leeds data are selected.Secondly,the integrity visual uniformity of the CIECAM02 is revised using the Munsell Renotation Data.Finally,the uniformity of the CIECAM02 and the revised CIECAM02 are investigated using the Munsell Renotation Data,and the results show that,the revised CIECAM02 is greatly improved in terms of partial and entire space.The experiment results not only can be directly applied in the CMS of computer operating system and software,but also can be referenced for the future research of the uniform color spaces.

Synthesis and Photochromism of the 2-Aryl-1,8-Phthaloylnaphthalene

HU Shi-rong, FANG Yue, HUANG Cheng-jin, ZHANG Yu-ping, DU Jin-zhen, CHEN Bo-yong

2009, 27(2):  135-140.  DOI: 10.7517/j.issn.1674-0475.2009.02.135

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Three photochromic compounds of 2-aryloxyl-1,8-phthaloylnaphthalenes were synthesized.The structures were characterized by elemental analysis,1HNMR,13CNMR,MS and IR spectrum.The products were determinated by fluorescence spectrometer,there were greater strength fluorescence intensity and stoke shift of the three photochromic compounds.The photochromic behaviors were determinated in acetone solution by UV-Vis spectrometer.The three photochromic compounds had a certain photochromism and a larger absorption coefficient in the 300-600 nm range

Study of the Structure and Photocatalytic Activity of the TiO₂ Prepared from the Treatment of NTA in CO

WANG Jing-ju, WANG Xiao-dong, WU Zhi-shen, JIN Zhen-sheng

2009, 27(2):  141-148.  DOI: 10.7517/j.issn.1674-0475.2009.02.141

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The structure and photocatalytic activity of the TiO₂ prepared from the treatment of nanotubed titanic acid (NTA) in CO was investigated.The results showed that when NTA was treated in CO at high temperature,the carbon doping in product TiO₂ did not appear,only carbon deposition on TiO₂ appeared;the BET areas of the products decreased markedly with the increase of treating temperature;The transformation temperature from anatase to rutile for TiO₂ obtained by CO treatment was much lower than thatobtained by air treatment.The TiO₂ obtained by CO treatment of NTA were inert in photocatalytic activity under visible-light irradiation,but active under UV-light irradiation,while the UV light photocatalytic activity decreased with the increase of the treating temperature in CO atmosphere.

Low-Temperature Preparation of TiO₂ and Photodegradation of Toxic Organic Pollutants

DENG An-ping, HUANG Ying-ping, FANG Yan-fen, CHEN Yan, YANG Tian-ming

2009, 27(2):  149-158.  DOI: 10.7517/j.issn.1674-0475.2009.02.149

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TiO₂ particles were prepared under low-temperature conditions by sol-hydrothermal-steam method.The characteristics of TiO₂ were carried out using XRD,BET,TEM.The results showed the basic structure of product was mainly anatase phase with the existence of brookite phase (121)) and the BET was 106.2 m²/g.The photo-catalytic degradation under UV light (λ≤387 nm) of organic dye Rhodamine B (RhB) was used as probe reactions to evaluate the optimum TiO₂.TiO₂ prepared under low-temperature conditions had a better degradation effect to RhB and 2,4-DCP,which were significantly degradated in TiO₂/UV (λ≤387 nm) system by analysing UV-vis spectroscopy,FTIR and TOC.After 5 h and 7 h the mineralized rate of RhB,2,4-DCP was 81.2%,86.8%,respectively.N,N-diethyl-p-phenylenediamine (DPD),Horseradish peroxidase (POD),spectro-photometry and benzoic acid spectro-fluorescence analysis method were used to detect hydrogen peroxide (H₂O₂) and hydrogen radicals (·OH).The experiment results indicated that photo-catalysis degradation of TiO₂ mainly referred to ·OH radical mechanism.