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Online since: February 2012
Authors: Guang Ming Wu, Yang Cao, Yan Ying Zhu, Yang Zhou, De Wen Gao, Zhi Qian Zhang
Cui et al. [] have prepared CdS films with certain orientation and less large grains by using ultrasonic chemistry method.
The mechanical effect can promote the interaction between ions thus promoting chemical reactions carried out completely, and the cavitation shock waves break a crystal shape structure, thereby inhibiting the formation of large micelles; thermal effects can promote cohesion; chemical effect can promote the oxidation-reduction reaction, so it’s a good role in promoting the growth of the CdSe film.
Finally, the dry substrate was putted into the furnace; the annealing temperature is about 350 °C. 2.5 Characterizations The crystal structure of the film was determined by XRD (SHIMAZU XRD-7000, Cu target, Kα radiation).
Conclusions Ultrasonic-assisted chemistry method is involved to synthesize CdSe films.
Preparation of cadmiumsulfide semiconductor films by chemical solution growth and ultrasonical chemistry method, J.
Online since: January 2010
Authors: Ke Qing Zhao, Yang Yang, Wen Hao Yu, Bi Qin Wang, Ping Hu
Synthesis and mesomorphism of semi-fluorinated chain liquid crystals with [1,2,3]-triazole rings Yang Yang, Ke-Qing Zhaoa , Wen-Hao Yu, Bi-Qin Wang and Ping Hu College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, China a kqzhao@sicnu.edu.cn Keywords: Click chemistry; Copper catalyzed Alkyne-azide cycloaddition; Semi-fluorinated chain; Smectic A phase Abstract.
The click reaction catalyzed by copper salt between alkynes and azides has attracted great attention in the field of materials chemistry, organic synthesis, drug discovery, and biologic research[6-8].
In this paper we have used click chemistry the first time to have synthesized a series of liquid crystals containing 1,2,3-triazole and semi-fluorinated chain.
All the click chemistry products have given satisfactory mass data measured by high resolution mass spectrometer, which are coincidence with their molecular structures.
This research has demonstrated that click chemistry is an efficient method to introduce fluorinated chain to liquid crystalline molecules.
Online since: May 2015
Authors: Laurentiu Baschir, Madalin Rusu, Valeriu Savu, Daniel Tenciu
A three – five monolayers structures were developed using the Langmuir – Blodgett technique onto ceramic substrate.
Also the investigations performed, revealed the properties of carbon nanotubes and point out the fine chemistry of these materials.
Introduction The ability of the porphyrin macrocycle to coordinate metals is one of the most widely studied areas in porphyrin chemistry.
Study of porphyrins has developed into a subject of interdisciplinary research due to their importance and relevance in a wide range of areas such as chemistry, biology and medicine [1-3].
A single monolayer is adsorbed homogeneously with each immersion or emersion step and complex structures are achieved.
Online since: January 2010
Authors: Hitoshi Asahi, Yasuhiro Shinohara, Takuya Hara
To meet the required excellent weldability and low production costs, the application of low carbon chemistry and bainite structures produced through means of TMCP is essential.
Boron addition achieves a lower bainite microstructure easily and a resultantly good HAZ toughness for relatively lean chemistry.
The amount of increase in YS is influenced by microstructure and chemistry and becomes larger with increases in the amount of strain.
On the other hand, X120 steel has been developed using boron-added low-carbon chemistry [1].
Technology to generate various bainitic microstructures in TMCP, especially in easy-to-perform and stable processes for lean chemistry should be improved.
Online since: March 2009
Authors: A.N. Mansurova, R.I. Gulyaeva, Evgeny N. Selivanov
The structure of the compound Са2FеСuSО3 found in the systems CaFeSO-Cu, Ca3Fe2S3O6-Cu and CaO-FeO-CuS is given in table 1 below.
The differences are caused both by structure and chemical compound, as well as by the purity of initial compounds.
Selivanov et al.: Doklady Chemistry, Vol. 393 (2003), p. 255
Craig, Mineral Chemistry of Metal Sulfides, Cambridge: Cambridge Univ.
Chijikova: Physical chemistry of restoration of iron from oxides.
Online since: August 2008
Authors: T.D. Hung, D. Pernica, Dora Kroisová, Oleg Bortnovsky, Petr Louda, Vladka Rylichova
(ii) properties of geopolymeric matrices: geopolymeric matrices are fabricated from various types of geopolymeric resins that were made at Research Institute of Inorganic Chemistry, Inc., Czech Republic and testing for mechanical properties, and by SEM for structure characterization.
The samples were made with the dimentions and tested under three-point bending in accordance with ASTM D790(3), and SEM (Scanning Electron Microscope) method was used to analyse the structure of geopolymers.
Fig. 2 SEM of Q3V-30 AR 2400 tex Fig. 3 SEM of Q3V-23 E glass Summary Research and experiments are on going in Department of Material Science, Faculty of Mechanical Engineering, Technical University of Liberec, and Research Institute of Inorganic Chemistry, Inc., Ústí nad Labem, Czech Republic, which will permit us to find the additives for geopolymers, fabrication methods and curing conditions for geopolymer composites with the best adhesion between the reinforcements and geopolymer matrices.
Davidovits: Geopolymer, Green Chemistry and Sustainable Development Solutions, Proceedings of the World Congress Geopolymer (2005), p. 9
Balaguru: Geopolymer, Green Chemistry and Sustainable Development Solutions, Proceedings of the World Congress Geopolymer (2005), p. 201-208
Online since: October 2018
Authors: A.A. Treschev, Aleksandr A. Bobryshev, Alsu Yusupova
Transition structures and reaction barriers were evaluated [18-19].
Kalinkin, Structure and properties of modified sulfur binder, Building materials. 7 (2005) 6-9
Wells Structural Inorganic Chemistry, Oxford University Press, Ely House, London, 1975
Aleskovsky, Quantum synthesis, Russian Journal of Applied Chemistry. 11 (2007) 1761-1767
Gribov, Quantum Chemistry, Moscow, Gardariki, 1999
Online since: December 2024
Authors: Samir Karimov, Elshad Abdullayev, Muslum Gurbanov, Lala Gasimzada
This high-resolution chromatographic separation allowed for detailed profiling and analysis of the molecular structures involved in the HCB degradation process in 2-propanol.
Each derivative exhibit unique spectral peaks that correspond to their respective chlorine substitutions and molecular structures shown in Fig. 3.
The reaction was primarily driven by hydroxyl radicals, which contributed to the breakdown of the phenolic structure [41].
Evans, Radiolytic dechlorination of chlorinated organics, Radiation Physics and Chemistry, 49(2) (1997) 257–264
Wang, Gamma radiolytic degradation of naphthalene in aqueous solution, Radiation Physics and Chemistry, 123 (2016) 97–102
Online since: February 2015
Authors: Yulia V. Aksenova, Georgii V. Mayer, E.V. Antina, Rimma T. Kuznetsova
The mechanisms of complexes protonation are discussed dependence from the structure of ligands.
Objects and methods On the Fig.1 are presented the structures and designations of researched compounds.
Synthesis and verifications of structures BOD1–Bod12 was produced in Institute of Solution Chemistry RAS accordingly [8, 9, 11].
[8] M.Berezin, A.Semeikin, E.Antina, G.Guseva, Vyugin , Journ of General Chemistry 82 (2012) 1189-1893
Effect of compounds structure on basicity of reaction centers, Chemistry and Chemical Technology 56(5) (2011) 799-804
Online since: October 2011
Authors: Jing Xu
The similar degree of topological structure is that of topological relationships among sub-structures of structure graph.
Comparing structure graph of symbol part with molecule graph in chemistry, meta symbol type corresponds to atom type, link relation corresponds to bond attribute, hence, the methods of distinguishing compound similarity in chemistry graph theory can be referred to calculate the similar degree of structure graph.
The atom pair method is widely used in chemistry graph theory to distinguish compound similarity.
Comparing symbol part structure graph with molecule graph in chemistry, meta symbol type corresponds to atom type, link relation corresponds to bond attribute, hence, the algorithms of retrieving compound in chemical database can be referred to retrieve isomorphic structure graph.
Morgan algorithm in chemistry graph theory is one of algorithms of isomorphism testing for graph, which is widely used in isomorphism testing of compound structure graph.