Search results

Sythesis of a Novel Unsymmetrical Photochromic Diarylethene Compound bearing a Six-membered Aryl Unit Duohua Jiang, Gang Liu *, Weijun Liu , Shiqiang Cui Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, P.
Diarylethene 1a was prepared according to the method described in Scheme 2 .The structure of compound 1a was confirmed by 1H NMR(400 MHz, CDCl3): δ 1.77(s, 3H, -CH3), 2.02 (s, 3H, -CH3), 3.63 (s, 3H, -CH3), 7.14 (t, 1H, J = 8.0 Hz, thiophene-H), 7.20-7.31 (m, 4H, phenyl -H),7.34(s, 1H, phenyl -H), 7.38(d, 1H, J = 8.0 Hz, phenyl -H), 7.49(s, 1H, phenyl -H), 7.59(d, 1H, J = 8.0 Hz, phenyl -H); 13C NMR (400 MHz, CDCl3): δ11.40, 14.65, 29.95, 101.05, 109.12, 119.51, 121.03, 122.03, 123.72, 125.53, 127.39, 130.16, 134.93,135.32, 137.09, 137.80, 139.89, 141.51.
Irie : Chemistry Letters.

Formation of Positronium in Cup-stacked Carbon Nanofibers Hideoki Murakami1, Toshihiro Hiejima2 and Mizuka Sano3 1 Department of Physics, Faculty of Education, Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan, email address: murakami@u-gakugei.ac.jp 2 Department of Applied Chemistry, Faculty of Engineering, Tokyo Institute of Polytechnics, Atsugi, Kanagawa 243-0297, Japan 3 Department of Chemistry, Division of Natural Sciences, International Christian University, Mitaka, Tokyo 181-8585, Japan Keywords: positronium, cup-stacked carbon nanofibers, graphite, Raman spectrum Abstract The positron-lifetime spectrum for cup-stacked carbon nanofibers (CNFs) is composed of three components: 0.125 ns� (fixed) (6%), 0.345 ns (75%), 1.21 ns (19%).
Recently graphite materials of structure different from graphite have been prepared: multi-walled carbon nanotubes (MNTs) and cup-stacked carbon nanofibers (CNFs).

Synthesis and Photocatalytic Activity of Modified TiO2 Thin Films Prepared by Spray Pyrolysis Laura Rozenberga-Voskaa * and Jānis Grabisb Institute of Inorganic Chemistry, Faculty of Material Science and Applied Chemistry, Riga Technical University, Paula Valdena Street 3/7, Riga, LV-1048, Latvia alaura.rozenberga-voska@rtu.lv, bjgrabis@rtu.lv Keywords: titanium dioxide; spray pyrolysis deposition; photocatalytic activity; thin films; silver.
XRD patterns of TiO2 thin films annealed at 500 °C for 2 – 6 hours Several spray depositian times were made: 4, 6, 8 and 10 minutes and obtained XRD patterns are equal, containing anatase phase, which is well known as the most suitable structure for the photocatalysis.

Lanthanum manganite, LaMnO3 is compatible with YSZ as an oxygen electrode due to its defect chemistry, electrical conductivity, and cathodic polarization.
The obtained sintered samples were studied for their structure, morphology, and electrical conductivity.
Jacobson: Chemistry of Materials Vol. 22 (2010), pp.660-674

Frank, Comparison of dye-sensitized rutile- and anatase-based TiO2 solar cells, Journal of Physical Chemistry B, vol. 104, pp. 8989-8994, 2000
Sugihara, Visible-light-active titanium oxide photocatalyst realized by an oxygen-deficient structure and by nitrogen doping, Applied Catalysis B: Environmental, vol. 42, pp. 403-409, 2003
Nakato, Mechanism for Visible Light Responses in Anodic Photocurrents at N-Doped TiO2 Film Electrodes, The Journal of Physical Chemistry B, vol. 108, pp. 10617-10620, 2004

The commercial cellulase used in this study was purchased from Hangzhou Zhuoli Chemistry Co., Ltd.
Changes in the structure of cellulase will lead to changes enzymes properities.General, the immobilizaton optimal temperature will drop , This agreement with our experiment result the optimal temperature of free enzyme was 55 °C, while immobilized enzyme is 30 °C.
Acknowledgments This work was financially supported by Zhejiang Provincial Top Key Academic Discipline of Applied Chemistry and Eco-Dyeing & Finishing Engineering (ZYG2010016), Zhejiang Students Science and Technology Innovation Activities Projects (2010R406032), and Zhejiang Provincial Key Innovation Team (2010R50038).

Preparation and Evaluation of Sodium Hydroxymethyl Lignosulfonate as Eco-friendly Drilling Fluid Additive Jie Zhang*, Gang Chen, Nai-wang Yang, Yang-guang Wang College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an, 710065, China Email: zhangjie@xsyu.edu.cn, gangchen@xsyu.edu.cn, sxynw88@163.com, 176223333@qq.com Keywords: sodium hydroxymethyl lignosulfonate, drilling Fluids, additive Abstract.
The structures of the results were shown in Scheme 1.
References [1] Zhang J., Chemistry and Application of Plant Phenols.

Fluorescent Carbon Dots (CDs) as a pH sensor Feng Lina, Weina Heb and Xiangqun Guoc* The Key Laboratory of Analytical Science and the Key Laboratory for Chemical Biology of Fujian Province, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
However the origin of fluorescence of CDs has not yet been fully understood, as well as the inner structure or surface groups which may play an important role in the emission spectra.

Ultraviolet Spectrum Analysis of 1-methyl-3-butyl Imidazole Tetrafluoroborate in Ethanol Yangyang Song, Peng Tian*, and Lu Yu College of Chemistry and Life Science, Shenyang Normal University, Shenyang 110034, China *email: tianpenglnu@sina.com Keywords: Ultraviolet spectrometry method, BMIBF4 ionic liquid, Ethanol Abstract. 1-methyl-3-butyl Imidazole chloride is prepared by 1–methyl imidazole and chlorinated n-butane.
Furthermore, non-volatility under vacuum gives them suitable property as green chemistry solvents[1-4].
We use infrared spectrometer for the structure characterization.

Biological evaluation of a novel angiotensin II AT1 receptor antagonist with anti-hypertensive and anti-tumor effects Yajing Da, Zhilong Chen* Department of Pharmaceutical Science & Technology, College of Chemistry and Biology, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China Department of Pharmaceutical Science & Technology, College of Chemistry and Biology, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China dayajing@126.com, zlchen1967@yahoo.com.
Fig.1 The chemical structure of compound 1 Materials and methods Angiotensin II receptor binding assay Vascular smooth muscle cells (VSMCs) were obtained from thoracic aorta of SD rats and cultured by the tissue explants methods [5, 6].