Table of Content

23 March 2011, Volume 29 Issue 2

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The Organic-Transition Metal Complex and the Emission of Triplet States

WU Shi-kang, WANG Peng-fei

2011, 29(2):  81-98.  DOI: 10.7517/j.issn.1674-0475.2011.02.81

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In recent years,the emission of triplet state of organic-transition metal complex attracted extensive attentions with the development of OLED devices.It not only concerns with the increase the device efficiency,but also with some problems deeply in the field of photo-physics.In this article,the energy level splitting of organic-metallic compounds,and the zero-field splitting(ZFS) of emissive triplet state are discussed briefly.Simultaneously,the relationship of electronic configuration of centered metallic ions,such as the octahedral and square planar coordination and their photo-physical behaviors are also discussed.Especially,the emission state of these compounds,under the influence of spin-orbital coupling(SOC) and configuration interaction(CI) which can induce the admixture of singlet and triplet state,then to improve the emissive transition from the lowest triplet state to ground state,has also been discussed.

Synthesis and Photopolymerization Kinetics of 2-(4-Methoxyphenyl)-4,6-bis(trichloromethyl)-S-triazine Photoinitiator

LU Jian, SONG Guo-qiang, WANG Ke-ming, MA Gui-ping, NIE Jun

2011, 29(2):  99-107.  DOI: 10.7517/j.issn.1674-0475.2011.02.99

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2-(4-methoxyphenyl)-4,6-bis(trichloromethyl)-S-triazine(MBTT),a highly efficient UV initiator,which was synthesized based on p-methoxy benzonitrile and trichloro acetonitrile.MBTT was characterized by FTIR,¹HNMR and UV absorption spectra.Real time infrared spectroscopy(RTIR) was used to investigate the effect of different monomer system,different light intensity and concentrations of photoinitiator on the polymeirzation kinetics.The results showed that the double bond conversion of diacrylate monomer is higher than that of triacrylate monomer.With the increase of light intensity,the rate of polymerization(R_p) and final double bond conversion increased and the induction period shortened.

Synthesis and Fluorescence Behavior of Pyrene Decorated Silicon Nanowires

ZHAO Wen-chao, WANG Jian-tao, WANG Hui, ZHANG Xiao-hong

2011, 29(2):  108-113.  DOI: 10.7517/j.issn.1674-0475.2011.02.108

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Covalent anchoring functional molecule to the silicon nanowire surface is one of the important strategy to obtain novel nanomaterials for silicon nanodevice.But a serious problem for this surface modified is the uncontrollably oxide of the surface of silicon nanowire in the modification process.Therefore,it is highly desired to find a mild method for the modification of silicon nanowires.In this paper,we covalently attached pyrene molecules onto the silicon nanowires’ surface through forming Si—O—C bond via reaction of Hydroxyl-(from the functional molecule) with Si—H(on the silicon nanowire surface).The product was characterized by ATR-FTIR;in addition,its fluorescence behavior was also investigated.

Dissolving and Electro-Chemical Deposition of Copper Phthalocyanine

QIAN Ling-feng, ZHANG Jia, XUE Min-zhao, ZHU Yuan-yuan, ZHANG Qing, LIU Yan-gang

2011, 29(2):  114-122.  DOI: 10.7517/j.issn.1674-0475.2011.02.114

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In order to obtain the ideal Copper Phthalocyanine(CuPc) film from organic solution,first,we studied the solubility of CuPc in different solvents,and the effect of various amounts of trifluoroacetic acid(TFAA) to CuPc;Second,we fabricated CuPc films with different electro-chemical deposition conditions,and discussed the changes of the surface morphology.Then using the UV-Vis to measure the spectrum of copper phthalocyanine(CuPc) in four different organic solvents;using the scanning electron microscopy(SEM) to observe the surface morphology of CuPc films.The results showed that: after adding TFAA,CuPc is easily dissolved in both nitro-methane and chloroform,but in chloroform,it is more easily protonated;the amount of TFAA and CuPc has great influence to the surface morphology.

Investigation of Cage Effect of Water-Soluble Dendrimers as Microreactors

YUAN Zhao, ZHENG Shao-jun, ZENG Yi, CHEN Jin-ping, LI Ying-ying, HAN Yong-bin, LI Yi

2011, 29(2):  123-132.  DOI: 10.7517/j.issn.1674-0475.2011.02.123

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The α-cleavage photoreactionof 1-phenyl-3-p-tolyl-propan-2-one(CH3-DBK) hasbeen conductedin aqueoussolutions of water-soluble poly(aryl ether) dendrimers G_n(n=1-4) and PAMAM dendrimers PG_m(m=1-3).The product distributionreveals that dendrimers can provide a more constrained microenvironment than the homogenous solutions.The cage effect increases with the generation of G_n,indicative of a better confined microenvironment of higher generation G_n.The cage effect can also be enhanced by increasing the concentration of dendrimer.PG_m(m=1-3) have much less constrained microenvironment,consequently exhibit low cage effect.

Colorimetric and Electrochemical Pb²⁺ Detection by σ-Bridged Tetrathiafulvalene-Pyridine Derivatives

WANG Xiao-jun, XING Ling-bao, GENG Yan, CHEN Bin, TONG Zhen-he, WU Li-zhu

2011, 29(2):  133-139.  DOI: 10.7517/j.issn.1674-0475.2011.02.133

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Two σ-bridged TTF-σ-pyridine derivatives,T4Py,and TB,were synthesized and characterized.It was found that T4Py displayed remarkable changes in solution,¹HNMR spectra,and electrochemical properties,upon complexation with Pb²⁺ ions.

Synthesis and Characterization of a New Type Reactive Diluent-benzyl Glycidyl Ether Acrylate

WENG Zi-xiang, HUANG Bi-wu, ZHENG Xue-lin, JIANG An-kun

2011, 29(2):  140-148.  DOI: 10.7517/j.issn.1674-0475.2011.02.140

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This article studied the effects of reaction temperature,the selection of catalyst and inhibitor on the synthesis of BGEA from benzyl glycidyl ether and acrylic acid,the product of which was characterized by FTIR.Experimental results show that the best reaction temperature was 110 ℃,the best mass fraction of catalyzer and inhibitor was 0.9% and 0.2% respectively.The UV-curing coating was prepared with adding BGEA to bisphenol A type epoxy diacrylate,and the properties of its cured film were investigated by using TG,AFM etc.

Study on the Preparation of Cationic Photoinitator(4-methylphenyl)-(4-isobutylphenyl)-Iodonium Hexafluorophosphate

LIU An-chang, YAO Shan, CHEN Huan-you, XIA Qiang, LI Gao-feng

2011, 29(2):  149-154.  DOI: 10.7517/j.issn.1674-0475.2011.02.149

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A method is provided for preparing(4-methylphenyl)(4-isobutylphenyl) iodonium hexafluorophosphate.Toluidine was diazotized by NaNO₂ and decomposed by KI to give 4-iodotoluene.4-iodotoluene reacted with isobutylbenzene in the presence of ammonium peroxodisulfate which acted as oxidant,and then reacted with ammonium chloride to give(4-methylphenyl)(4-isobutylphenyl) iodonium chloride salt.The resulting(4-methylphenyl)(4-isobutylphenyl) iodonium chloride salt reacted with KPF₆ in the solution of acetone to give the(4-methylphenyl)(4-isobutylphenyl)-iodonium hexafluorophosphate,its structure was identified by UV,IR,and ¹HNMR.The total yield is above 46.7%.

The Noncovalent Decoration and Fluorescence Enhancement of Tetraphenylethylene Derivatives

ZHANG Du-shan, LI Yi

2011, 29(2):  155-155.  DOI: 10.7517/j.issn.1674-0475.2011.02.155

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