Search results

Synthesis and Properties of a New Diarylethene1-[2-methyl-5-(10-phenanthrenyl)-3-thienyl] -2-[2-methyl-5-(4-formylphenyl)-3-thienyl]perfluorocyclopentene Fang Duan and Shouzhi Pu* Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, P.
Among these novel photochromic diarylethenes, there are few examples of photochromic diarylethenes bearing phenanthrene rings, which has a rigid planar biphenyl structure.
The structure of compound 1o was characterized by 1H NMR spectroscopy.

A Molecular Dynamics Simulation of the Tensile Behavior of Y-Branched-CNT/SiC Nanocomposite Guobin Zhenga*, Hideaki Sanob, Osamu Nakagoec, Shuji Tanabed 1Division of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University, Nagasaki, 852-8521, Japan agbzheng@nagasaki-u.ac.jp, bsano@nagasaki-u.ac.jp, cn-osamu@nagasaki-u.ac.jp, ds-tanabe@nagasaki-u.ac.jp Keywords: Molecular dynamics; carbon nanotube; SiC; nanocomposite.
Materials and Simulation Method SiC block with a cubic crystal structure and a size of 5.12 nm× 20.71 nm × 216.9 nm was used in the simulation.
Compared with the junction of the CNT in Fig. 1a, the carbon network in Fig. 4a deformed greatly, due to the flexibility of graphene structure.

CuO is grey-black in color with a monoclinic crystal structure and a band gap of 1.2-1.5 eV.
The obtained black products were investigated by FE-SEM (JEOL JSM-6335F) for morphology, energy dispersive spectroscopy (EDS) for chemical composition, and X-ray diffraction for crystal structure.
Photochemistry and Photobiology A: Chemistry Vol. 194 (2008), p. 143

Synthesis of some curcumin analogues under ultrasound irradiation Lei Yingjie a, Bi Ye b and Ouyang Jie c School of Chemistry & Chemical Engineering,Tianjin University of Technology,China a yingjlei@163.com, b biye@tjut.edu.cn, c ouyang@tjut.edu.cn Keywords: Curcumin analogues; Synthesis; Ultrasound irradiation Abstract.
Although extensive studies have been done on the molecule of curcumin, the structure-activity relationship and pharmacological profile have not been adequately evaluated.
Notably, the very special functional group of β-diketones structure with a highly conjugated side chain system has aroused the chemists’ interests.

Characterization of Coconut Shell Activated Carbon Obtained from By-product of Preparation Process of Bio-oil with Fast Pyrolysis Qing-Ruo Xie1, 2,a, Zhang-Fa Tong1, b, Li-Wen Zheng2, Xiao-Guang Chen1 1School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China 2Depart of Biology and Chemical Engineering, Guangxi University of Technology, Liuzhou 545006, China ahuagong104@163. com, bdean@gxu. edu. cn Keywords: activated carbon(AC);coconut shell(CS); porosity; fast pyrolysis; bio-oil Abstract.
Increasing the pyrolysis temperature from 723 to 823 K increased the release of low-molecular-weight volatiles from the carbon structure.
This formation of an intermediate melt in the char blocked the pores and obstructed the passage of the steam molecules into the pore structure, thereby reducing the carbon burn-off during steam activation of the char.

Preparation and Retarding Characteristics of Coal/Mg,Al-hydrotalcite Composites Xiubin Ren1,a, Anning Zhou1,b, Bo Liu1,c,Long Lei1,d 1College of chemistry and chemical engineering, Xi'an University of Science and Technology, Xi’an Shannxi, 710054, P.R.
The intensities of peaks are strong, which indicates that the well-crystallized Mg,Al-hydrotalcite with unique and ordered crystal structure is obtained.
The first one between 75-178℃ corresponds to the removal of interlayer water, whilst the second one between 235-382℃ is due to dehydroxylation of the layers, loss of interlayer carbonate ions and breakdown of the layer structure[10-11].

The Discussion of the Results Obtaining high molecular weight PPS is a complex catalytic process, in connection with which the selection of catalysts, as a result of which it is possible to synthesize a polymer of a linear structure, is an important scientific and technical task.
[6] V A Sergeev, V K Shitikov, V I Nedel'kin, Poly(arylene Sulphides) — Preparation, structure, and properties, Russ. chem. rev., 47 (1978) 1095–1109
Hawkins, Chemistry of the Cure of Poly(p-phenylene sulfide), Macromolecules. 9 (1976) 189

CuO/CeO2 and CuO/PrO2-CeO2 Catalysts for Preferential Oxidation of CO Zhijun Zhaoa, Ruoyu Wang, Qianlong Zhao, Enpeng Wang, Haiquan Sub and Shanghong Zeng*,c School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China ayueyuxinjin@sina.com, b haiquansu@yahoo.com, cshanghongzeng001@163.com Keywords: Hydrogen, CeO2; PrO2, Preferential CO oxidation Abstract.
The BET surface area and pore structure of the catalysts were determined by nitrogen physisorption at liquid nitrogen temperature using a Micromeritics Apparatus (Model ASAP2020).
Table 1 Average crystallite size, structure and textural properties of the catalysts Catalyst Crystallite size (nm) CeO2 d111 (Å) CeO2 Lattice parameter (Å) BET (m2/g) Pore diameter (nm) Pore volume (cm3/g) CuO/CeO2 6.4 3.138 5.4004 95.9 10.87 0.2608 CuO/5PrO2-CeO2 5.5 3.128 5.4063 127.0 8.72 0.2771 CuO/10PrO2-CeO2 6.6 3.146 5.4059 134.5 9.65 0.3246 CuO/15PrO2-CeO2 5.8 3.137 5.4139 137.7 10.16 0.3500 Scanning electron microscope Fig. 2 shows SEM micrographs of the CuO/CeO2 and CuO/5PrO2-CeO2 catalysts.

Fabrication and Performances of Titanium-grafted Microencapsulated Phase Change Materials MENGYI XU1, a, SHULE LIN2,b SHENGZHAO GONG1,c ZHUORU YANG2,d 1Department of Chemical Engineering, Guangdong Industry Technical College, Guangzhou, China 2School of Chemistry and Chemical Engineering, South China University of Technology amyi_xu@163.com, b linsl1986@126.com, c shengzhao2002@yahoo.com.cn, d zhryang@scut.edu.cn Keywords: Titanium dioxide microspheres, Phase Change Materials, Morphology Abstract.
Introduction The synthesis of particles with a specific size, structure, and morphology is a primary importance for the development of new materials.
The fundamental research to tailor their physical properties or interpret the surface interactions quantitatively as a function of the morphology, structure, and size of the spheres is essential for the applications of the particles in a number of fields, such as ceramics, catalysts, solar cells, pigments, photonic crystals, medicine, and sensor devices[1-5].

The asymmetric P-O stretching mode (ν3) of the P-O bond of the PO43 group (1200 to 960 cm-1) indicated a deformation of the phosphate coordination symmetry from their tetrahedral structure [9].
Structure and Chemistry of the Apatites and Other Calcium Orthophosphates.