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Online since: February 2014
Authors: Xin Jian Song, Ping Yang, Yao Nie, Zhen Zeng, Jin Shun Zhao, Hui Gao
The structure of the product was characterized by 1H NMR, MS, elemental analysis and single-crystal X-ray diffraction.
The structure was solved by direct methods with SHELXS-97 [10] and expanded using Fourier difference techniques.
The structure of the newly synthesized compound 5 was characterized by 1H NMR, mass spectroscopy and elemental analysis.
The molecular structure of compound 5 is depicted in Fig. 1.
The title structure was confirmed by 1H NMR, mass spectroscopy, elemental analysis and X-ray crystallo- graphic studies.
The structure was solved by direct methods with SHELXS-97 [10] and expanded using Fourier difference techniques.
The structure of the newly synthesized compound 5 was characterized by 1H NMR, mass spectroscopy and elemental analysis.
The molecular structure of compound 5 is depicted in Fig. 1.
The title structure was confirmed by 1H NMR, mass spectroscopy, elemental analysis and X-ray crystallo- graphic studies.
Online since: April 2010
Authors: Yvan Houbaert, Pablo Rodriguez-Calvillo, Lucia Suarez
The appearance of brittle ordered structures when Si+Al content in steel is above 4 m.%
does not always make its industrial production easy.
Therefore hot dipping in a Al-Si bath followed by a diffusion annealing was found to be a productive way of steels with high Si and/or Al concentration and to overcome the creation of fragile structures during deformation processes, such as rolling.
Therefore, hot dipping in a Al and/or Al-Si bath followed by a diffusion annealing was found to be a productive way of steels with high Si and/or Al concentration and to overcome the creation of fragile structures during deformation processes, as rolling [2].
The influence of the substrate and bath chemistry on growth kinetics of the Fe2Al5 intermetallic layers is also investigated in this work and, assuming a parabolic law, the results are compared with the literature.
Although, the presented results are in good agreement with the literature they present some scatter due to experimental consideration as chemistry of the alloys, temperatures, time and type of the diffusion couple [4, 5, 9, 8, 11, 13, 19]. 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1E-4 1E-3 0.01 0.1 1 k*10E-10 (ms -1/2) 1000/T (10 3K -1 ) K.
Therefore hot dipping in a Al-Si bath followed by a diffusion annealing was found to be a productive way of steels with high Si and/or Al concentration and to overcome the creation of fragile structures during deformation processes, such as rolling.
Therefore, hot dipping in a Al and/or Al-Si bath followed by a diffusion annealing was found to be a productive way of steels with high Si and/or Al concentration and to overcome the creation of fragile structures during deformation processes, as rolling [2].
The influence of the substrate and bath chemistry on growth kinetics of the Fe2Al5 intermetallic layers is also investigated in this work and, assuming a parabolic law, the results are compared with the literature.
Although, the presented results are in good agreement with the literature they present some scatter due to experimental consideration as chemistry of the alloys, temperatures, time and type of the diffusion couple [4, 5, 9, 8, 11, 13, 19]. 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1E-4 1E-3 0.01 0.1 1 k*10E-10 (ms -1/2) 1000/T (10 3K -1 ) K.
Online since: January 2013
Authors: Zu Guang Liu, Le Le Zhao, Ya Hong Liu, Xue Er Huang
Synthesis and Properties of Rosin-modified Lignosulfonates
Lele Zhao 1, 2,a, Zuguang Liu 1,2,b*, Xueer Huang, Yahong Liu
1College of Chemistry and Chemical Engineering, Guangxi University of Nationalities, Nanning 530006, China
2 Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Nanning 530006, China
azhaolele0506@163.com, bliuzug@163.com
Keywords: lignosulfonate; rosin; surfactant
Abstract.
Hydrophilic sulfonic group and the lipophilic adbietic group were incorporated into the molecular structure of kraft lignin via corresponding reactions.
After the reaction, the mixture was evaporated under vacuum to remove isopropanol, extracted with ether (20 ml, every time) three times and dried in oven at 50 ˚{TTP}730 C℃ .The schematic structure of rosin-modified lignosulfonate is provided in Fig. 1 Fig. 1 The synthetic scheme of rosin-modified lignosulfonate Results and Discussion FT-IR analysis Fig.2 FT-IR spectra for lignosulfonate(a) Fig.3 FT-IR for epoxypropyl ester of rosin(a) and lignin(b) and rosin-modified Lignosulfonate(b) Figure 2 shows strong characteristic peaks for lignin at 1604 cm-1, 1512 cm-1 and 1270 cm-1.
Hydrophilic sulfonic group and the lipophilic adbietic group were incorporated into the molecular structure of kraft lignin via corresponding reactions.
After the reaction, the mixture was evaporated under vacuum to remove isopropanol, extracted with ether (20 ml, every time) three times and dried in oven at 50 ˚{TTP}730 C℃ .The schematic structure of rosin-modified lignosulfonate is provided in Fig. 1 Fig. 1 The synthetic scheme of rosin-modified lignosulfonate Results and Discussion FT-IR analysis Fig.2 FT-IR spectra for lignosulfonate(a) Fig.3 FT-IR for epoxypropyl ester of rosin(a) and lignin(b) and rosin-modified Lignosulfonate(b) Figure 2 shows strong characteristic peaks for lignin at 1604 cm-1, 1512 cm-1 and 1270 cm-1.
Online since: January 2009
Authors: Yun Huai Zhang, Xiao Yan Fan
More recently, the surface chemistry of TNT can be easily modified through
coordination with amine and carboxyl groups TNT electrodes, and used in detection of electro-active
molecules or as biosensors [20-22].
As reported elsewhere [25,26], an anodization voltage of less than 10 V yielded a nanoporous structure.
The nanotube structure was lost at anodizing voltages greater than 23V in inorganic solutions, with a sponge-like randomly porous structure being realized.
With the annealed temperature increasing, crystal structure of the TiO2 nanotube gradually change from anatase to rutile and the size of TiO2 nanotubes increased gradually too.
Such reduction of photocurrent is in good agreement with SEM measurements and is ascribed to the collapse of nanotube structures
As reported elsewhere [25,26], an anodization voltage of less than 10 V yielded a nanoporous structure.
The nanotube structure was lost at anodizing voltages greater than 23V in inorganic solutions, with a sponge-like randomly porous structure being realized.
With the annealed temperature increasing, crystal structure of the TiO2 nanotube gradually change from anatase to rutile and the size of TiO2 nanotubes increased gradually too.
Such reduction of photocurrent is in good agreement with SEM measurements and is ascribed to the collapse of nanotube structures
Online since: January 2012
Authors: Dong Ming Qi, Lei Yang, Cheng Jie Hu, Hai Yang
Modern polymer science revealed that the synthetic polymer properties (i.e. mechanical, rheology, etc) were dependent on chain sequence structure other than compositions [7].
The polymer chains structures were controlled by the monomer feeding policies.
It demonstrates that TC1 and TC2 have the target triblock chain structure.
[7] Matyjaszewski K., Tsarevsky N.V., Nanostructured Functional Materials Prepared by Atom Transfer Radical Polymerization, Nature Chemistry. 1 (2009) 276-288
R., Saiz E., et al, Analysis of Copolymers of Styrene and Methyl Methacrylate Using Size Exclusion Chromatography with Multiple Detection, Physical Chemistry Chemical Physics. 5 (2003) 151-157
The polymer chains structures were controlled by the monomer feeding policies.
It demonstrates that TC1 and TC2 have the target triblock chain structure.
[7] Matyjaszewski K., Tsarevsky N.V., Nanostructured Functional Materials Prepared by Atom Transfer Radical Polymerization, Nature Chemistry. 1 (2009) 276-288
R., Saiz E., et al, Analysis of Copolymers of Styrene and Methyl Methacrylate Using Size Exclusion Chromatography with Multiple Detection, Physical Chemistry Chemical Physics. 5 (2003) 151-157
Online since: October 2024
Authors: Abdul Waheed Anwar, Zeeshan Abdullah, Inam Ul Haq, Zunair Arslan, Muhammad Awais Raza
The results of XRD pattern showed that composite of rGO/NiO was synthesized without changing the reactant structure.
Lam, Development of supercapacitors with 3D porous structures, Chem ElectroChem (2024)
Béguin, Carbon/carbon supercapacitors, Journal of Energy Chemistry 22(2013)
Lee, WG Jung, Facile and safe graphene preparation on solution based platform, Journal of Industrial and Engineering Chemistry 20(2014) 2883-2887
Liu, Preparation of monolithic polymer columns with homogeneous structure via photoinitiated thiol-yne click polymerization and their application in separation of small molecules, Analytical chemistry 86(2014).
Lam, Development of supercapacitors with 3D porous structures, Chem ElectroChem (2024)
Béguin, Carbon/carbon supercapacitors, Journal of Energy Chemistry 22(2013)
Lee, WG Jung, Facile and safe graphene preparation on solution based platform, Journal of Industrial and Engineering Chemistry 20(2014) 2883-2887
Liu, Preparation of monolithic polymer columns with homogeneous structure via photoinitiated thiol-yne click polymerization and their application in separation of small molecules, Analytical chemistry 86(2014).
Online since: June 2015
Authors: Anatolii G. Belous, S.O. Solopan, S.M. Ryabchenko, V.M. Kalita, Alexandr Tovstolytkin
Nanopowders were characterized by a DRON-4 X-ray diffractometer for structure and phase identification.
Results and Discussion Particles structure, size and morphology.
Yurkov, Magnetic nanoparticles: preparation, structure and properties, Russian Chemical Reviews 74 (2005), 489-520
Synthesis of transition metal ferrites with the structure of discrete nanoparticles complexed with long-chain carboxylate anions, Inorganic Chemistry 41 (2002), 6137-6146
Belous, Peculiarities of the synthesis of low-agglomerated nanoparticles Fe3O4 from microemulsions, Ukrainian Chemistry Journal 78 (2012), 3-8
Results and Discussion Particles structure, size and morphology.
Yurkov, Magnetic nanoparticles: preparation, structure and properties, Russian Chemical Reviews 74 (2005), 489-520
Synthesis of transition metal ferrites with the structure of discrete nanoparticles complexed with long-chain carboxylate anions, Inorganic Chemistry 41 (2002), 6137-6146
Belous, Peculiarities of the synthesis of low-agglomerated nanoparticles Fe3O4 from microemulsions, Ukrainian Chemistry Journal 78 (2012), 3-8
Online since: April 2015
Authors: Hang Zhou, Yan Wang, Zhong Gao Xia, Xiao Du
The final device structure comprises of copper oxide/perovskite CH3NH3PbI3 /Ag structures.
2.
A schematic structure of copper oxide/perovskite CH3NH3PbI3 heterojunction Solar Cell is shown in Fig.1. 3.
Tetragonal perovskite structure was confirmed by XRD measurement.
The Journal of Physical Chemistry C, 2012, 116(19): 10510-10515
The Journal of Physical Chemistry Letters, 2013, 4(6): 897-902.
A schematic structure of copper oxide/perovskite CH3NH3PbI3 heterojunction Solar Cell is shown in Fig.1. 3.
Tetragonal perovskite structure was confirmed by XRD measurement.
The Journal of Physical Chemistry C, 2012, 116(19): 10510-10515
The Journal of Physical Chemistry Letters, 2013, 4(6): 897-902.
Online since: May 2023
Authors: Xiao Yong Wan, Yu Wang, Jin Jiang He, Qiao Xia Zhang, Yan Ru Kang, Nan Liu, Qi Qi Qi
However, the coarse grain structure can be transformed into uniform, fine and randomly oriented grain structure by forging, rolling and other deformation methods [11-13].
(b) (a) Figure 3 Images of As-cast microstructure of Cu-0.69wt% Mn alloy: (a) OM, (b) SEM However, in the production process, there are often some metallurgical defects in the as-cast structure, as shown in Figure 4.
Mater & Chemistry and Physics. 1998, 52: 5-16
Materials Chemistry and Physics. 1995, 41: 192-198
Chen, Research on grain structure of super high purity copper sputtering target, J.
(b) (a) Figure 3 Images of As-cast microstructure of Cu-0.69wt% Mn alloy: (a) OM, (b) SEM However, in the production process, there are often some metallurgical defects in the as-cast structure, as shown in Figure 4.
Mater & Chemistry and Physics. 1998, 52: 5-16
Materials Chemistry and Physics. 1995, 41: 192-198
Chen, Research on grain structure of super high purity copper sputtering target, J.
Online since: July 2011
Authors: Yong Ning Zhou, Zheng Wen Fu
Electrochemical characterization of metal oxynitride thin film as new lithium storage materials
Yong-Ning Zhoua, Zheng-Wen Fub
Department of Chemistry & Laser Chemistry Institute, Shanghai Key laboratory of Molecular Catalysts and Innovative materials, Fudan University, Shanghai 200433, P.R.China
aynzhou@fudan.edu.cn, bzwfu@fudan.edu.cn
Keywords: thin film, lithium batteries, dc sputtering
Abstract.
The structure and composition of thin films are characterized by X-ray photoelectron spectroscopy (XPS) and selected area electron diffraction (SAED) measurement.
The space group is Fm3m, a typical face-centred cubic structure.
To our surprise, the SAED patterns show almost same diffraction spectra as that in Fig. 3(a) just with more amorphous structure, indicating that V2ON can be reproduced but in nanometer size after recharging process.
In recharging process, MN could be reformed, whose structure and chemical composition were similar to the original.
The structure and composition of thin films are characterized by X-ray photoelectron spectroscopy (XPS) and selected area electron diffraction (SAED) measurement.
The space group is Fm3m, a typical face-centred cubic structure.
To our surprise, the SAED patterns show almost same diffraction spectra as that in Fig. 3(a) just with more amorphous structure, indicating that V2ON can be reproduced but in nanometer size after recharging process.
In recharging process, MN could be reformed, whose structure and chemical composition were similar to the original.