Search results

Morphology and Field-Effect Mobility Characterization of Planar Five-Ring-Fused Dithiophene-Dione Jing Wang* Key Laboratory of Analytical Chemistry for Life Science of Shangqiu Normal University, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu, 476000, P.
The molecule possesses linear π-conjugated structure similar to pentacene, which shows liquid crystalline phase and higher thermal and photo-stability compared to pentacene.
When the film was deposited at higher temperature (Tsub = 80 °C), the peak intensities increased, suggesting that the order of molecular structure in the film was improved, and thus the increased mobility was resulted.
The transistor behavior of compound 1 was studied using the top contact device structure on a Si/SiO2 substrate (Fig. 3). 1 performed as p-channel semiconductors.
Tsub [°C] µ [cm2V-1s-1] on/off ratio VT [V] 20 1.3×10-5 5×103 -61.6 50 1.3×10-3 2×106 -45.8 80 9.3×10-3 4×106 -46.8 Conclusions In conclusion, compound 1 shows layer-like structures in thin film, which exhibits increased crystal grain size and film order with the increase of substrate temperature.

The distortion behavior of Ti3AlC2 ceramic is similar with that of hexagonal crystal structure metal.
The crystal structure of carbide ternary compound Ti3AlC2 is hexagonal (see Fig.7), and has the space group P63/mmc.
The layered structure revealed that Ti3AlC2 ceramic has a unique combination of merits of both metals and ceramics.
Barsoum: Progress Solid State Chemistry, Vol. 28 (2000), p.201 [2] N.
Zhou: Journal of Materials Chemistry, Vol. 12 (2002), P. 455 [5] C.

Introduction Material formation is a complex process of physical chemistry.
In the process, material is formed to blank or component from a series of complex changes of physical, chemistry and metallurgy.
Usually there are large quantities of chills in the ordinary foundry simulation, especially the huge ductile iron castings and gray iron castings with complex structures[2].
Though one stage is more than former, the auto geometry cleanup and batchmesh function of HyperMesh module can clear up and incorporate the simple structures by which reduce the panel points and unit elements, so much time can be saved.
So the result can be summarized as follow: 1）The optimized technological process achieves seamless integration of CAD/CAE owing to that HyperMesh module can even transform data with the current three-dimensional geometric modeling and forms all. 2）The total of the panel points and unit elements reduce obviously because of introducing the functions of auto-geometric clearing up and incorporating the simple structures of HyperMesh module to the optimized technological process. 3）The small amount of panel points and unit elements and the fast mesh-process capacity contribute to reform of hot-machining technological process, shorten the period which we define the final technology.

The metallocene catalysts had several advantages unmatched by conventional catalysts, including:(1) high catalytic activity, the catalytic activity was 10 to 100 times than the traditional Ziegler-Natta catalyst;(2) having an adjustable resistance with polyolefin structure, the polyolefin could be synthesized which had the specific stereoregularity and the high isotacticity from the perspective of the molecule tailoring;(3)could catalysis and polymerize an olefin with special function, such as a metallocene polyolefin elastomers , block copolymers, etc. ; (4) a narrow molecular weight and a uniform chemical composition of the polymer [6].
Fig.1 P-O bidentate ligand catalyst 1.1.2 N-O bidentate ligand of Ni catalyst The structure of neutral salicylaldehyde imine root combined Ni catalyst was shown in Fig.2[10].
Fig.5 The structure of Tridentate ligands 3.2.3 Other ligand catalysts Co (acac)3/MAO catalysts might be used for the copolymerization of styrene and butadiene[14].The copolymer was a high cis-1 ,4 - structure and with high Mr.
[5] Alt, G.H.; Schertl, P. & Koppl, A.- Journal of Organometallic Chemistry, 568, p.263 (1998)
Inorganic Chemistry. 2003,9(19):913-919

Degradation of acid dyes by resin D072 load Fe (Ⅱ) catalyst Binsong Wang 1,2,a ,Linhong Li1,b, Fuyi Cui2,c，Jie Zhang 3,d* 1 School of Chemistry and Materials Science，Heilongjiang University，Harbin 150080，China 2School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China 3 School of Life Science ,Northeast Forestry University, Harbin 150040,China a609291321@qq.com b52229779@qq.com ccuifuyi@hit.com d875817856@qq.com Keywords: dye wastewater, decoloration rate, degrade Abstract.
Experimental Chemicals Fig.1 Chemical structure of Acid Light Yellow G Fig.2 Chemical structure of Acid Brilliant Scarlet GR Macro porous strong acid cation exchange resin D072 was obtained from Tianjing xingnan yunneng macromolecule technology Ltd..
Acid Light Yellow G, Acid Brilliant Scarlet GR, Acid Turquoise Blue A (chemical structure see Fig. 1, Fig. 2 and Fig. 3), industrial grade, was supplied by Beijing Chemical Reagents Ltd..
Fig.3 Chemical structure of Acid Turquoise Blue A Experimental procedures (1)Resin pretreatment: First, 20 g resin catalysts was added into anhydrous ethanol for 6~8 h to remove the organic substances, and rinsed with distilled water.
[3]Ravichandran L,Selvam K,Swaminathan M:Photo-Fenton defluoridation of pentafluorobenzoic acid with UV-C light[J].Chemistry,188(2007),392-398

Currently, several synthetic methods for the construction of α-aminophosphonate structures have been developed [10–11].
In the present work, we report a facile and efficient method for the preparation of bis-α-aminophosphonate-modified 1,6-diaminohexanes under solvent-free conditions and the charateriazation of their structures.
The chemical structures of the series of bis-functionalized 1,6-diaminohexane derivatives 7-9 were characteriazed by NMR and high resolution mass spectrometry.
The reaction conditions were optimized and the structures of these derivatives were characterized with NMR and MS.
Smiley, in: Ullmann's Encyclopedia of Industrial Chemistry.

Abstract: Hydrogen bonded supra molecular structure is the essential feature of cinnamic acid (phenyl acrylic acid) while forming a layered crystal structure in solid state.
Since the hydrogen bonded structure is susceptible to rupture at temperature changes above the ambient, a temperature dependent positron annihilation spectroscopic study has been performed to investigate the changes of its molecular structure.
Since the hydrogen bonded structure is susceptible to changes with variation in temperature, the present work has been aimed to study the perturbation effect due to weaker hydrogen bond interaction that helps to maintain the closed packed crystalline structure.
These trapping sites could originate from a layered arrangement [1,4] of the molecular structure with the strongly electronegative polar group existing in a layer followed by the non polar zone (as in the lamellar structure of the amphiphiles[5]).
S Glasstone, Text Book of Physical Chemistry, Tata Macmillan, New York, 1997 p 499-501.

Powders had a HA dominant phase structure above a pH of 8.
Phase purity and the structure of the powders were characterized by using Philips X'PERT PRO XRD.
Morphology of the powder transforms from nearly spherical to a more elongated structure.
The structure is HA dominant above pH 8 with a minor amount of alfa-TCP.
References [1] Corbridge D.E.C., "Phosphorous an Outline of its Chemistry, Biochemistry and Technology" Studies in Inorganic Chemistry 10, Elsevier,(1990)

The molecular structure determined by NMR was presented as PEO42-b-PtBMA48.
The molecular structure determined by NMR was presented as PEO42-b-PMAZO10.
PEO-b-PMMA was synthesized by the ATRP technique using protected group chemistry, followed by hydrolysis in acidic conditions.
The molecular structures of PEO42-b-PMAA48 and PEO42-b-PMAZO10 were shown in Fig. 1, respectively.
Molecular structures of PEO-b-PMAA and PEO-b-PMAZO.

Modification of Cotton Yarns for Smart Socks Production Ieva Bake1,a*, Vineta Afanasjeva1,b and Silvija Kukle1,c 1Riga Technical University, Material Science and Applied Chemistry Faculty, Institute of Design Technology, Kipsalas 6-218, Riga, LV-1048, Latvia aieva.bake@edu.rtu.lv, bvineta.afanasjeva@gmail.com, csilvija.kukle@rtu.lv Keywords: sol-gel technology, yarn modification, cotton.
Characteristics of Knitted Fabric Structure.
The required parameters characterizing the structure of knitted fabric were determined.
It is concluded that lower humidity affects thread structure morphology (surface becomes more solid and fragile).
Wardman, The Chemistry of Textile Fibres, UK: RSC Publishing, 2011, 367