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Online since: October 2010
Authors: Guillermo Monrós, Carina Gargori, Mario Llusar, Araceli García, Roberto Galindo
New ceramic pigment structures.
Several authors have studied perovskite as ceramic pigment structure: (i) R.A.
Popović, J. of Molecualr Structure, Vol. 744-747 (2005), p. 535-540
Cruciani, Journal of Solid State Chemistry, Vol. 179 (2006), p.233–246
Monrós, Green Chemistry, Vol. 3 (2001), p. 238-242
Several authors have studied perovskite as ceramic pigment structure: (i) R.A.
Popović, J. of Molecualr Structure, Vol. 744-747 (2005), p. 535-540
Cruciani, Journal of Solid State Chemistry, Vol. 179 (2006), p.233–246
Monrós, Green Chemistry, Vol. 3 (2001), p. 238-242
Online since: September 2011
Authors: Xi Shi Tai
Preparation and structural determination of
anhydrous calcium sulphate crystal whisker material
Xi-Shi TaI1, a
1 College of Chemistry and Chemical Engineering,
Weifang University, Weifang 261061, P.
The crystal data and experimental parameters relevant to the structure determination are listed in Table 1.
The crystal structure of calcium (II) sulphate crystal is shown in Fig. 1.
The molecules are assembled into one-dimension chain structure along the a-axis (Fig. 3).
Fan: Journal of Materials Chemistry Vol. 13 (2003), p. 1817
The crystal data and experimental parameters relevant to the structure determination are listed in Table 1.
The crystal structure of calcium (II) sulphate crystal is shown in Fig. 1.
The molecules are assembled into one-dimension chain structure along the a-axis (Fig. 3).
Fan: Journal of Materials Chemistry Vol. 13 (2003), p. 1817
Online since: June 2017
Authors: Fu Hua Sun, Kai Li Jia, Yu Xi Qiao, Min Zhang, Lin Ling Li, Yu Hua Zhen
The results show that the KNN have been crystallized in a perovskite structure with orthorhombic phase.
Rubiomarcos, Chemistry of Materials 26 (2014) 3838-3848
Cheng, Journal of Materials Chemistry 2 (2014) 1519
Ding et al., Journal of Physical Chemistry C 112 (2008) 18846
Yoshimura, Journal of Physical Chemistry B 109 (2005) 18846-18848
Rubiomarcos, Chemistry of Materials 26 (2014) 3838-3848
Cheng, Journal of Materials Chemistry 2 (2014) 1519
Ding et al., Journal of Physical Chemistry C 112 (2008) 18846
Yoshimura, Journal of Physical Chemistry B 109 (2005) 18846-18848
Online since: November 2013
Authors: He Ping Li, Jin Wei Yuan, Guan Wei Yang, Yun Yan Huang
The structure of product was characterized by FT-IR and SEM.
Our research of this paper would be utilized in the aspect of studying the relationship between the structure of xylan derivatives and anti-biological activities.
Structure Analysis IR analysis of Product.
The change of granular structure could be attributed to the esterification, which disrupted the original structure of bagasse xylan by breaking the hydrogen bonds of molecules[17~19].
Maryam: Food Chemistry Vol. 138(2013), p. 1028-1033
Our research of this paper would be utilized in the aspect of studying the relationship between the structure of xylan derivatives and anti-biological activities.
Structure Analysis IR analysis of Product.
The change of granular structure could be attributed to the esterification, which disrupted the original structure of bagasse xylan by breaking the hydrogen bonds of molecules[17~19].
Maryam: Food Chemistry Vol. 138(2013), p. 1028-1033
Online since: September 2013
Authors: Yu Hu, Ying Chun Li, Xiao Xiao Zhuang, Xiao Xia Sun
Chiral Discrimination of the Diastereomeric Salts with
(R)-Nipecotic acid and Tartaric acid Derivative
SUN Xiaoxia1,a*,LI Yingchun1,b, ZHUANG Xiaoxiao1,c, HU Yu2,d*
1Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University,
Nanchang 330013, People’s Republic of China
2Experimental Chemistry Center, Nanchang University, Nanchang 330031, Jiangxi Province,
China
asunxiaoxia77@126.com; blyc8751902@163.com; czhuangxiaoxiao1987@163.com; dhuyu@ncu.edu.cn
Keywords: (R)-nipecotic acid; resolution; Molecular complex; molecular recognition; self-assembly
Abstract: An effective resolving agent, (D)-dibenzoyl tartaric acid (2b), was screened to yield direct resolution of (S)- ethyl nipecotate (1) with high optical purity and yield.
The less-soluble salt formed a supra molecular structure by enantio differentiating self-assembly.
From the different absorptions of the two diastereomeric salts, we can infer the difference of the two salts in the structure is also relatively large, so two diastereomeric salts have great different solubility.
It is interesting that the less-soluble salt form well defined, and extremely ordered supramolecular structures via hydrogen bonded networks.
The structures were solved with direct methods by using SHELXL-97 and refined by full-matrix least-square calculation on F∧2∧ with SHELXL-97.
The less-soluble salt formed a supra molecular structure by enantio differentiating self-assembly.
From the different absorptions of the two diastereomeric salts, we can infer the difference of the two salts in the structure is also relatively large, so two diastereomeric salts have great different solubility.
It is interesting that the less-soluble salt form well defined, and extremely ordered supramolecular structures via hydrogen bonded networks.
The structures were solved with direct methods by using SHELXL-97 and refined by full-matrix least-square calculation on F∧2∧ with SHELXL-97.
Online since: July 2012
Authors: Yun Xia Li, Bao Cai Xu, Gui Ju Zhang, Lu Cui
Amide surfactants have modified structures with lipophilic groups connecting hydrophilic groups through amido bond.
Surfactants are widely used in many industries like food, chemistry, drug, paper manufacturing, leather and fur making, materials, environmental protection and textiles as important functional fine chemicals to improve process, efficiency, product quality, and to save energy because of their unique chemical nature at interfaces.
N-acyl amino acids surfactants are a type of amide surfactants made from modifying the structure of soap.
In order to obtain better properties of the cationic surfactants, new structure of the quaternary ammonium salts containing amide groups were synthesized by the use of dimethyl carbonate.
Structure –function relationship of acyl amino acid surfactants: surface active and antimicrobial properties, J.
Surfactants are widely used in many industries like food, chemistry, drug, paper manufacturing, leather and fur making, materials, environmental protection and textiles as important functional fine chemicals to improve process, efficiency, product quality, and to save energy because of their unique chemical nature at interfaces.
N-acyl amino acids surfactants are a type of amide surfactants made from modifying the structure of soap.
In order to obtain better properties of the cationic surfactants, new structure of the quaternary ammonium salts containing amide groups were synthesized by the use of dimethyl carbonate.
Structure –function relationship of acyl amino acid surfactants: surface active and antimicrobial properties, J.
Online since: June 2019
Authors: Jens Holtmannspötter, Hans Joachim Gudladt, Torsten Thäsler
The subsequent surface treatment via atmospheric pressure plasma jet or vacuum blasting allowed the modification of the microscopic roughness as well as the surface chemistry.
If surfaces were free of contaminations, no differences between microscopically smooth and slightly structured surfaces were found.
After analysing the surface roughness and chemistry, quasi-static and fatigue tests were carried out on single lap shear joints.
Fig. 1 shows the surface roughness, where a smooth respectively uneven structured surface was formed in case of A50001 and A50002 and an oriented surface structure in case of peel ply 408.07P and 08940.
In addition, the stress peaks caused by the structuring of the boundary layer trigger the failure within the adherent.
If surfaces were free of contaminations, no differences between microscopically smooth and slightly structured surfaces were found.
After analysing the surface roughness and chemistry, quasi-static and fatigue tests were carried out on single lap shear joints.
Fig. 1 shows the surface roughness, where a smooth respectively uneven structured surface was formed in case of A50001 and A50002 and an oriented surface structure in case of peel ply 408.07P and 08940.
In addition, the stress peaks caused by the structuring of the boundary layer trigger the failure within the adherent.
Online since: June 2011
Authors: Mohammad Reza Vaezi, Sayed Khatiboleslam Sadrnezhaad, Shahab Khameneh Asl, M. Kianpour Rad
The structure and morphology analyses of powders were carried out with x-ray diffraction.
Thus, suitable bulk and surface properties, and energy structure are required for photocatalysts.
Robertson: the hand book of environmental chemistry, environmental photochemistry part 2( Springer-Verlag Berlin Heidelberg, 2005)
Hirakawa et al.: Journal of Photochemistry and Photobiology A: Chemistry Vol. 190 (2007) P. 58
Dushkin: Materials Chemistry and Physics Vol. 106 (2007) P.187
Thus, suitable bulk and surface properties, and energy structure are required for photocatalysts.
Robertson: the hand book of environmental chemistry, environmental photochemistry part 2( Springer-Verlag Berlin Heidelberg, 2005)
Hirakawa et al.: Journal of Photochemistry and Photobiology A: Chemistry Vol. 190 (2007) P. 58
Dushkin: Materials Chemistry and Physics Vol. 106 (2007) P.187
Online since: August 2012
Authors: Jiang Tao Li
A mild method prepared carboxy carbon nanocage
JiangTao LI
Department of Chemistry & Chemical Engineering Xi’an University of Arts and Science,
Key Disciplinary Areas of Analytical Chemistry
Xi’an, China, 710065
E-mail address: lijiangtao-968@126.com
Keywords: carbon nanocage; oxidation
Abstract.
These materials possess a well ordered pore structure, very high specific pore volume, specific surface area and tunable pore diameter.
The broad band appearing at 3300–3600 cm-1 is also attributed to the formation of carboxylic structures [13, 14, 17, 18].
This might be due to the changes in the framework structure as well as the hydrophilic character of the carbon surface upon oxidation.
Zawadzki, Infrared Spectroscopy in Surface Chemistry of Carbons, in Chemistry and Physics of Carbon, ed.
These materials possess a well ordered pore structure, very high specific pore volume, specific surface area and tunable pore diameter.
The broad band appearing at 3300–3600 cm-1 is also attributed to the formation of carboxylic structures [13, 14, 17, 18].
This might be due to the changes in the framework structure as well as the hydrophilic character of the carbon surface upon oxidation.
Zawadzki, Infrared Spectroscopy in Surface Chemistry of Carbons, in Chemistry and Physics of Carbon, ed.
Online since: December 2022
Authors: Fahmi Asyadi Md Yusof, Mohd Awis Abdullah, Nur Hanin Rasyidah Hashim, Haniza Kahar, Noor Faizah Che Harun, Adrina Zulkifli
The polymer chemical structure of PNIPAAm-CTA was characterized using 1H NMR spectra.
Chemical Structure of PNIPAAm-CTA, PNIPAAm-M and PNIPAAm-PhM.
To confirm the chemical structure of synthesized PNIPAAm-CTA, 1H-NMR analysis was conducted.
End group removal and modification of RAFT polymers, Polymer Chemistry (2010) 1, 149
Chang, Star poly (N-Isopropylacrylamide) tethered to polyhedral oligomeric silsesquioxane (poss) nanoparticles by a combination of ATRP and click chemistry, J.
Chemical Structure of PNIPAAm-CTA, PNIPAAm-M and PNIPAAm-PhM.
To confirm the chemical structure of synthesized PNIPAAm-CTA, 1H-NMR analysis was conducted.
End group removal and modification of RAFT polymers, Polymer Chemistry (2010) 1, 149
Chang, Star poly (N-Isopropylacrylamide) tethered to polyhedral oligomeric silsesquioxane (poss) nanoparticles by a combination of ATRP and click chemistry, J.