Table of Content

23 May 2011, Volume 29 Issue 3

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Fabrication of Rubrene Inverse Opal and Its Optical Properties

ZHONG Kuo, MENG Wan, DING Tao, SONG Kai, TONG Zhen-he(TUNG Chen-ho)

2011, 29(3):  161-167.  DOI: 10.7517/j.issn.1674-0475.2011.03.161

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Rubrene inverse opal was fabricated via a silica colloidal crystal template and surface-wetting technique.Moreover,the photonic band gap of the rubrene inverse opal was successfully measured,which corresponds with the theoretical calculations.This method provides a platform for further fabrication of inverse opal structure with other organic semiconductor materials.Furthermore,the unique structural features of three-dimensional ordered macroporous may find novel optical and electrical properties.

Capture,Storage and Transformation of Carbon Dioxide

ZHU Jia-yi, HE Jun-hui

2011, 29(3):  168-180.  DOI: 10.7517/j.issn.1674-0475.2011.03.168

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After the global climate conference in Copenhagen in 2009,how to reduce emissions of the greenhouse gas CO₂ causing global warming and transform it into useful chemical products has become the hot spot in the global research.Our work summarized the study on CO₂ capture、 storage and transformation until now.Furthermore,we combined the principle and characteristic of each CO₂ utilization technology,summarized their advantages and disadvantages and at last showed the outlook of CO₂ utilization.

Synthesis of Isoalloxazine Modified C₆₀-polypropylene Acid and Its Interaction with DNA

WANG Zhong-li, GAO Yun-yan, OU Zhi-ze, GUO Chuang-long, LI Hai-xia, JIN He-lin

2011, 29(3):  181-193.  DOI: 10.7517/j.issn.1674-0475.2011.03.181

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Poly(acrylic acid) conjugated fullerene(C₆₀-PAA) is synthesized by free-radical polymerization.C₆₀-PAA is covalently linked with riboflavin analogue 6,7-Dimethyl-9-(2’-hydroxyethyl)-isoalloxazine through esterification reaction,affording C₆₀-PAA-DHIX.The products are characterized by Fourier transform infrared spectroscopy(FT-IR),proton nuclear magnetic resonance(¹HNMR),UV-visible absorption spectroscopy(UV-Vis),and fluorescence spectroscopy.Cyclic voltammetry results show that the first reduction potential of fullerene moiety is higher than that of DHIX moiety in C₆₀-PAA-DHIX.ESR results indicate that multi-step photoinduced electron-transfer processes may occur between C₆₀-PAA-DHIX and N,N-dimethyl aniline under irradiation.One-electron transfer from N,N-dimethyl aniline to excited-state DHIX induces the generation of DHIX^-· radical,followed by electron transfer from the DHIX^-· radical to C₆₀,forming the corresponding anion radical of C₆₀(C₆₀^-·).The results obtained from DNA melting experiments,UV-Vis absorption and fluorescence spectra suggest that C₆₀-PAA-DHIX could interact with CT DNA through groove binding mechanism.However,C₆₀-PAA can only weakly interact with DNA.C₆₀-PAA-DHIX exhibited stronger DNA photodamage ability on plasma DNA than C₆₀-PAA under anaerobic condition.

Application of Photoluminescent PAMAM Dendrimer in Fingerprint Detection

JIN Yu-juan, LUO Yun-jun, LI Guo-ping, LI Jie

2011, 29(3):  194-202.  DOI: 10.7517/j.issn.1674-0475.2011.03.194

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The application of photoluminescent PAMAM dendrimer as a fluorescent marker in oily-riched fingerprint detection on tinfoil,transparent adhesive tape in different condition(such as generation of dendrimers,concentration,treating time,wave of exciting light,etc) was studied in detail.The results show: the fluorescent material exhibited strong visible blue fluorescence under excitation at 365 nm in the dark,and PAMAM dendrimer was a good marker for fingerprint residue targeting,with weaker background development and better contrast between fingerprints and the substrate,and also it is easy to operate without any pollution,which indicates that it is an effective reagent for latent fingerprints detection on non-porous surfaces.Last,the contrast between fingerprints and the substrate was calculated by computer,which shows that the contrast of fingerprints is over 90% when developed by PAMAM dendrimer solutions.

The Preparation and Mechanism of Microscale Gold Structures on the Polymer with Different pH

WANG Wei-kang, ZHENG Mei-ling, ZHAO Zhen-sheng, DUAN Xuan-ming

2011, 29(3):  203-211.  DOI: 10.7517/j.issn.1674-0475.2011.03.203

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We present a simple in situ synthesis method for preparing gold nanoparticles(Au NPs),in which the Au NPs self-aggregate into different microscale structures on a polyelectrolyte film(PEF) surface.In this approach,the aggregation behavior of Au NPs has been controlled by tuning the pH of the PEF,resulting in the different binding regime of the amine group.The round platelet gold structure has been observed on the surface of PEF with pH of 5.40.The size of the dendritic structure obtained on the surface of acidic PEF with pH of 0.65 is twice larger than that of the pH 5.40 PEF.In addition,the morphology of the gold structures changed into spheres when the pH changed from 5.40 to 12.77.Furthermore,the controlling mechanism of PEF has also been discussed.

The Influence of PEG Grafting Level on the Drug Loading Capacity and Stability of Gold Nanoshells on Silica Nanorattles

CHEN Shuai-na, LIU Hui-yu, CHEN Dong, WU Xiao-li, TANG Fang-qiong, YANG Wen-zhi

2011, 29(3):  212-221.  DOI: 10.7517/j.issn.1674-0475.2011.03.212

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In this paper,we grafted various amounts of polyethylene glycol(PEG) onto the surface of gold nanoshells on silica nanorattles(GSNs) and investigated the effects of grafting level about drug loading capacity and stability of GSNs.The results showed that the average thickness of GSNs increased about 4 nm after PEGylation.With the increase of PEGylation,the sedimentation rate of GSNs decreased gradually and the stability increased,and GSNs keeps good stability after standing 35 days.Inductively coupled plasma atomic emission spectrometry(ICP-OES) tests show that it will reach saturation point of PEGylation when the molar ratio of PEG and Au reaches nearly 0.24.In addition,it has no influence on drug loading capacity about different PEGylation processes.The results of this study will provide an important theoretical basis for the optimization the PEGlyation on the surface of inorganic nanomaterials and for the development of inorganic nano-carrier materials in vivo applications.

Synthesis and Photopolymerization Kinetics of 2,4-Bis(trichloromethyl)-6-(4-methoxy-1-styryl)-s-triazine

JIANG Ping, WANG Ke-min, NIE Jun, SONG Guo-qiang, MA Gui-ping

2011, 29(3):  222-231.  DOI: 10.7517/j.issn.1674-0475.2011.03.222

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2,4-Bis(trichloromethyl)-6-(4-methoxy-1-styryl)-s-triazine(BMT) is a highly efficient UV initiator,which was synthesized based on 4-methoxybenzaldehyde and 2,4-bis(trichloromethyl)-6-methyl-1,3,5-triazine.BMTwas characterized by Infrared Spectroscopy,Ultraviolet spectrum and ¹HNMR Spectroscopy.Real time infrared spectroscopy(RTIR) was used to study the effect of different initiator concentrations,different monomer system and light intensity on the polymerization kinetics.The results indicated that the double bond conversion of diacrylate monomer is higher than that of triacrylate monomer.0.1% is the most suitable concentration.With the increase of light intensity,the double bond conversion increased.

The Synthesis, Characterization and Properties of Silicide Nanowire Arrays

LIU Hai-long, SHI Wen-sheng

2011, 29(3):  232-232.  DOI: 10.7517/j.issn.1674-0475.2011.03.232

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