Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: November 2011
Authors: Ai Bing Yu, Xiao Zhen Liu, Zhao Xin Liu, Gang Wang, Le Qi Ding, Ling Ling Song
The effect of heat treatment temperature on structure of AAO film was investigated.
The effect of heat treatment temperature on structure of AAO film was investigated.
Shen: Journal of Electroanalytical Chemistry Vol.655 (2011), p.56 [4] J.P.
The effect of heat treatment temperature on structure of AAO film was investigated.
Shen: Journal of Electroanalytical Chemistry Vol.655 (2011), p.56 [4] J.P.
Online since: September 2013
Authors: Wu Qin, Xue Qing Hu, Ming Zhong Gao, Jun Jiao Zhang, Chang Qing Dong, Yong Ping Yang, Ling Nan Wu, Lei Wang
The structure of the prepared oxygen carrier was characterized by scanning electron microscope (SEM) and an X-ray diffractometer (XRD).
This paper focuses mainly on the reaction of CuFe2O4 with coal using TGA, the structure of the prepared oxygen carrier was characterized by scanning electron microscope (SEM) and Field scanning electron microscopy/energy-dispersive X-ray spectrometry (FSEM/EDX).
Industrial and Engineering Chemistry Research, Vol. 35 (1996), p. 2469
This paper focuses mainly on the reaction of CuFe2O4 with coal using TGA, the structure of the prepared oxygen carrier was characterized by scanning electron microscope (SEM) and Field scanning electron microscopy/energy-dispersive X-ray spectrometry (FSEM/EDX).
Industrial and Engineering Chemistry Research, Vol. 35 (1996), p. 2469
Online since: September 2011
Authors: Zsolt Czigány, L. Hultman, H. Högberg, Gueorgui K. Gueorguiev, E. Broitman, A. Furlan
HRTEM have shown the CPx films exhibit a short range ordered structure with FL characteristics for substrate temperature of 300 ̊C and for a phosphorus content of 10-15 at.%.
These rings differ from those of other C allotropes, as well as from FL structures like FL-CNx.
This shows that incorporation of P in graphene has a unique influence on the film structure formation.
The position of the third peak at ~4 Å, however, differs slightly from the ~3.5 Å peak typical for the FL structure known from FL-CNx [5].
We should expect that, because of the fullerene structure, FL-CPx films have the lowest number of dangling bonds and, in consequence, low water adsorption.
These rings differ from those of other C allotropes, as well as from FL structures like FL-CNx.
This shows that incorporation of P in graphene has a unique influence on the film structure formation.
The position of the third peak at ~4 Å, however, differs slightly from the ~3.5 Å peak typical for the FL structure known from FL-CNx [5].
We should expect that, because of the fullerene structure, FL-CPx films have the lowest number of dangling bonds and, in consequence, low water adsorption.
Online since: January 2012
Authors: Ji Min Xie, Min Chen, Shu Yun Zhu, De Li Jiang, Yu Fang
Synthesis of 5-Benzoylacenaphthene in the Presence of [Bmim]Cl/AlCl3 Ionic Liquid
Shuyun Zhua, Deli Jiangb, Yu Fang b, Jimin Xie b, Min Chenb,*
a School of Food and Biological Engineering, Jiangsu University
b School of Chemistry and Chemical Engineering, Jiangsu University
301 Xuefu Road, Zhenjiang 212013, Jiangsu, PR China
Chenmin3226@sina.com
Keywords: acylation, ionic liquid, 5-benzoylacenaphthene, acenaphthene, benzoyl chloride
Abstract.
Pure 5-benzoylacenaphthene was obtained and the structure of 5-benzoylacenaphthene was identified by GC/MS, FT-IR and 1H NMR spectra.
Acknowledgment The present work is supported in part by the National Natural Science Foundation of China (No. 20207003), Doctoral Innovation Fund of Jiangsu (CX10B_265Z), Jiangsu Applied Chemistry and Materials Graduate Center for Innovation and Academic Communication foundation (2010ACMC08), and the Research Foundation for Talented Scholars of Jiangsu University (08JDG052).
Pure 5-benzoylacenaphthene was obtained and the structure of 5-benzoylacenaphthene was identified by GC/MS, FT-IR and 1H NMR spectra.
Acknowledgment The present work is supported in part by the National Natural Science Foundation of China (No. 20207003), Doctoral Innovation Fund of Jiangsu (CX10B_265Z), Jiangsu Applied Chemistry and Materials Graduate Center for Innovation and Academic Communication foundation (2010ACMC08), and the Research Foundation for Talented Scholars of Jiangsu University (08JDG052).
Online since: August 2014
Authors: Gang Liu, Wen Xiang Li, Rui Bo Su, Peng Wang, Zhen Ning Pan
Meanwhile we also design a temperature rise test of the 10kv three-core cable in step current, measuring the temperature of the cable structure in different steady state.
Table 4 The maximum and the minimum value of the thermal resistance, the error Environment Structure Maximum of the thermal resistance (m·K/W) Minimum of the thermal resistance(m·K/W) Error Air laying Insulation 0.321 0.299 7.0% The filling layer and the inner sheath 0.091 0.057 37.6% sheath 0.155 0.127 18.1% As shown in Table 4, the values of the thermal resistance of the filling layer and the inner sheath are more than 30% no matter the cable is air-laying.
[4] LENHART L,ECKHARD K,FOHRER N,et al.Comparison of two different approaches of sensitivity analysis[J].Physics and Chemistry of the Earth,2002, 27: 645-654
Table 4 The maximum and the minimum value of the thermal resistance, the error Environment Structure Maximum of the thermal resistance (m·K/W) Minimum of the thermal resistance(m·K/W) Error Air laying Insulation 0.321 0.299 7.0% The filling layer and the inner sheath 0.091 0.057 37.6% sheath 0.155 0.127 18.1% As shown in Table 4, the values of the thermal resistance of the filling layer and the inner sheath are more than 30% no matter the cable is air-laying.
[4] LENHART L,ECKHARD K,FOHRER N,et al.Comparison of two different approaches of sensitivity analysis[J].Physics and Chemistry of the Earth,2002, 27: 645-654
Online since: October 2014
Authors: Ming Tao Run, Shi Jie Niu, Jian Wang, Yu Qing Bai
Synthesis and Characterization of Carboxyl-terminated Hyperbranched Polyester
Shi Jie Niu, Jian Wang, Yu Qing Bai, Ming Tao Run*
College of Chemistry & Environmental Science, Hebei University, Baoding 071002, China
*Lhbx@hbu.cn
Keywords: Hyperbranched Polyester; Carboxyl End-GROUP; Succinic Anhydride
Abstract.
In order to prepare carboxyl-terminated hyperbranched polyester(HBP-COOH), succinic anhydride was used to modify hydroxyl-terminated hyperbranched polyester(HBP-OH), and the influences of the solvents, catalysts and time on the product’s structure were investigated.
By changing the composition and structure of hyperbranched polymers, e.g. changing the end-groups, materials with a variety of new special features will be obtained.
In order to prepare carboxyl-terminated hyperbranched polyester(HBP-COOH), succinic anhydride was used to modify hydroxyl-terminated hyperbranched polyester(HBP-OH), and the influences of the solvents, catalysts and time on the product’s structure were investigated.
By changing the composition and structure of hyperbranched polymers, e.g. changing the end-groups, materials with a variety of new special features will be obtained.
Online since: November 2012
Authors: Chang Lu Gao, Li Qun Gu, Xiu Hua Sun
Synthetic Glass Nanopore for Single Molecule Detection
Xiuhua Sun1a, Changlu Gao1b* and Li-Qun Gu2c
1School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Shandong 264209 China
2Department of Biological Engineering, University of Missouri, Columbia, MO 65211 USA
axiuhuasun3@gmail.com, bchanglu_gao@yahoo.com, cgul@missouri.edu
Keywords: Nanopore, Site-Directed Capturing Nanoparticle, Single Molecule Detection
Abstract The molecular-scale pore structure, called nanopore, interacting with target molecules in its functionalized lumen, can produce characteristic changes in the pore conductance, which allows us to identify single molecules and simultaneously quantify each target species in the mixture.
Introduction The nanopore, a pore structure made with a dimension at the molecular scale, is an ultrasensitive technique for single-molecule detection.
Nanopore technology has demonstrated great potential in biosensing [2], DNA and peptide detection [3], control of molecular transportation [4], and the study of single-molecule chemistry [5].
Introduction The nanopore, a pore structure made with a dimension at the molecular scale, is an ultrasensitive technique for single-molecule detection.
Nanopore technology has demonstrated great potential in biosensing [2], DNA and peptide detection [3], control of molecular transportation [4], and the study of single-molecule chemistry [5].
Online since: August 2010
Authors: Xue Chuan Wang, Xian Bo Lu, Tao Tao Qiang, Long Fang Ren
Because of its special molecular structure, hyperbranched
polymer can bring excellent properties, such as good solubility, high reactivity and good rheological
behavior [3,4].
Considering the advantages of hyperbranched polymers, such as lower viscosity, better consistency and shorter curing time, the branched structure of hyperbranched polymers was used to design polyurethanes molecule.
In the study, the branched structure is introduced to polyurethane molecule which has linear structure; as a result, the traditional structure of polyurethane is changed in some way and a novel polymer with space network is obtained.
Results and discussion FT-IR spectra of PPU and HBPU Fig.1 displayed the differences among the structure of HPAE (a), PPU (b) and HBPU(c).
The reason was that the branched structure of HBPU prevented water from the molecular more effectively than UT-200 with the unreacted active groups, such as: NCO had reacted with the moisture in the air.
Considering the advantages of hyperbranched polymers, such as lower viscosity, better consistency and shorter curing time, the branched structure of hyperbranched polymers was used to design polyurethanes molecule.
In the study, the branched structure is introduced to polyurethane molecule which has linear structure; as a result, the traditional structure of polyurethane is changed in some way and a novel polymer with space network is obtained.
Results and discussion FT-IR spectra of PPU and HBPU Fig.1 displayed the differences among the structure of HPAE (a), PPU (b) and HBPU(c).
The reason was that the branched structure of HBPU prevented water from the molecular more effectively than UT-200 with the unreacted active groups, such as: NCO had reacted with the moisture in the air.
Online since: July 2011
Authors: Qing Liong Liu, Li Lv, Xiao Jing Wang, Shu Wei Wang
Investigation of photo-induced C-H bond activating by CpRh(CO)2 complex using density functional theory
Qinglong Liu1,a, Shuwei Wang1,b, Li Lv2,c and Xiaojing Wang1,d,*
1College of Chemistry and Chemical Engineering, Inner Mongolia University, Huhehaote city 010021, P.R.
In order to understand the structures, spectra, and the details of the photoreaction mechanisms, in this work we investigated the structure change during the excitation from the ground state to the excited state.
The pictures of the molecular orbitals and optimized structures were illustrated using a MOLEKEL4.1 molecular visualization program.
It is clear that CpRh(CO)2 shows symmetric structure and Rh-CO is linear.
The optimized structures showed in Fig. 1.
In order to understand the structures, spectra, and the details of the photoreaction mechanisms, in this work we investigated the structure change during the excitation from the ground state to the excited state.
The pictures of the molecular orbitals and optimized structures were illustrated using a MOLEKEL4.1 molecular visualization program.
It is clear that CpRh(CO)2 shows symmetric structure and Rh-CO is linear.
The optimized structures showed in Fig. 1.
Online since: June 2015
Authors: Mohd Rafie Johan, Sharifah Bee Abd Hamid, Chin Wei Lai, Syazwan Hanani Meriam Suhaimy, M.R. Hasan
The resultant TiO2 NTs were then subjected to thermal annealing for manipulating the crystalline structure.
Scanning Electron Microscope (SEM) using a FEI Quanta 200F was applied to confirm the morphological structure of the prepared TiO2 NTs structures.
It could be observed that the nanotubular structure synthesized using ethylene glycol was exhibited much more uniform and obvious pore-structure, as illustrated in Figure 1.
X-ray diffraction (XRD) analysis The crystalline structure of the resulting TiO2 NTs were then evaluated by XRD pattern.
Well-structured nanotubes and smooth surface facilitates electron mobility along the tube axis [9] .
Scanning Electron Microscope (SEM) using a FEI Quanta 200F was applied to confirm the morphological structure of the prepared TiO2 NTs structures.
It could be observed that the nanotubular structure synthesized using ethylene glycol was exhibited much more uniform and obvious pore-structure, as illustrated in Figure 1.
X-ray diffraction (XRD) analysis The crystalline structure of the resulting TiO2 NTs were then evaluated by XRD pattern.
Well-structured nanotubes and smooth surface facilitates electron mobility along the tube axis [9] .