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Online since: September 2014
Authors: Lei Fang, Song Li
Methods The molecular structures of the MIPs were modeling by using Hyperchem 8.0 computational chemistry package (Hypercube, Inc.), which was running in Windows 7 operating system, with a CPU of Intel (R) Core i5-2310 2.90 GHz Dual Processors, RAM (memory) of 8 GB, and a hard disk of 1TB.
In Hyperchem 8.0 computational chemistry package, MM+ method was employed as the molecular mechanics force field computing method to obtain the energy of the molecular structures.
Journal of Molecular Structure: Theochem, 2007, 807(1): 101-107
Study on Structure and IR Spectra of TiO2-SiO2 Composite Oxide by Quantum Chemistry.
Trac-Trends in Analytical Chemistry, 2010, 29(11SI): 1363-1375
Online since: October 2010
Authors: Yun Sheng Zhang, Wei Sun, Zongjin Li
The corresponding reaction energy of every possible pathway was also calculated using computation chemistry method- semi-empirical AM1 calculation.
Molecular structure of HO-Si(OM)3 b.
Molecular structure of b.
Molecular structure of d.
Vol 21 (2009), p.67-73 [21] F.Liebau: Structural Chemistry of Silicates:Structure, Bonding Formation and Classification.
Online since: September 2007
Authors: Mark J. Loboda, Mike F. MacMillan, V.M. Torres, E.P. Carlson, Gil Yong Chung, Jian Wei Wan
In this paper, we report detailed film analyses for samples deposited in a multi-wafer planetary reactor using chlorosilane / propane chemistry.
An abrupt doping transition was achieved for continuous growth of multilayer device structures in this reactor by carefully controlling gas flows.
These results are comparable to the best results reported on other multi-wafer reactors with silane/propane chemistry as shown in Table 2.
It was reported that deep center concentration measured by DLTS in samples grown with chlorosilane chemistry is 5-10 times lower than that of samples grown with silane chemistry [8].
These results demonstrate that chlorosilane SiC epitaxy chemistry can be effectively scaled up for high volume commercial applications.
Online since: May 2014
Authors: Dariusz Łukowiec, Anna Danuta Dobrzańska-Danikiewicz, Mirosława Pawlyta
STRUCTURE OF NANOCOMPOSITES BASED ON CARBON NANOTUBES DECORATED WITH PLATINUM NANOPARTICLES A.D.
Nagase, Chemistry of nanocarbons, Wiley, West Sussex (2010)
Xing, Pt-Ru Nanoparticles Supported on Carbon Nanotubes as Methanol Fuel Cell Catalysts, Journal of Physical Chemistry C 111 (2007) 2803-2808
Prato, Decoration carbon nanotubes with metal or semiconductor nanoparticles, Journal of Materials Chemistry 17 (2007) 2679-2694
Thomas, J.CP Gabriel, Gas sensor array based on metal-decorated carbon nanotubes, The Journal of Physical Chemistry B 110/42 (2006) 21014-21020
Online since: July 2012
Authors: Hoong Kun Fun, Suchada Chantrapromma, Nawong Boonnak
In order to disprove this argument, we turn to the computational chemistry.
We use computational chemistry to find out the value of this energy barrier.
Two methods of computational chemistry calculations were applied.
These two different methods of computational chemistry gave similar conclusions and verify the experimental single crystal structure analysis results that macluraxanthone exists in two enantiomers and is a natural product artifact.
Karalai: Frontiers in Natural Product Chemistry (Benham Science Publishers LTD., 2005) p. 99 [8].
Online since: November 2018
Authors: Yan Ju Ji, Lei Liu, Yi Fan Liu
We first optimize the structure of a GeH monolayer film.
The Structure and Amorphization of Germanane,J.
Almlof, General methods for geometry and wave function optimization., The Journal of Physical Chemistry, 1992, 96(24): 9768-9774
Lee, Inter- and Intralayer Compression of Germanane, Journal of Physical Chemistry C 2014, 118, 28196−28201
Zurek, Crystal Structures and Electronic Properties of Single-Layer, Few-Layer and Multilayer GeH, Journal of Physical Chemistry C, 2016, 120(1)
Online since: April 2011
Authors: Herbert Boller
Some Aspects of the intercalation Chemistry of the Niobium and Tantalum Carbide Chalcogenides Nb2S2S, Ta2S2C and Ta2Se2C Herbert Boller Institut für Anorganische Chemie ,Johannes-Kepler-Universität Linz,A-4040 Linz, Austria herbert.boller@aon.at Keywords: transition metal carbide chalcogenides, intercalation, soft chemistry.
Introduction Tantalum carbide sulfide Ta2S2C [1] has a layered structure composed of hexagonal close packed slabs …STaCiTaS...STaCiTaS… This compound is the host lattice for extended intercalation chemistry similar to that of transition metal disulfides like TiS2, NbS2 or TaS2 because of the Waals gap between the adjacent sulfur layers [2 – 5].
Table 1: Carbide chalcogenides and their intercalation phases a[Ǻ] c[Ǻ] Δs[Ǻ]*) Structure Type Nb2S2C 3.263(1) 8.545(2) - 1T (P-3m1) Ta2S2C 3.270(1) 8.543(2) - 1T (P-3m1) Ta2Se2C 3.313(1) 8.968(2) - 1T (P-3m1) Kx(H2O)y[Nb2S2C] 3.301(2) 34.83(3) 3.06 3R(Ib) (R-3m) enx[Nb2S2C] 3.280(2) 36.61(4) 3.65 3R(Ib) (R-3m) Nax(H2O)y[Nb2S2C] 3.298(2) 14.55(2) 6.00 1T (P-3m1) Nax(H2O)y[Ta2S2C] 3.296(3) 14.43(3) 5.89 1T (P-3m1) *) Interlayer expansion with respect to the host lattice Nax(H2O)y[Nb2S2C] and Nax(H2O)y[Ta2S2C]: The two sodium intercalation phases, especially the latter one are easily oxidized when wet, which can be monitored by X-rays and thermograms.
One can conclude that, with respect to their intercalation chemistry, the two sulfide carbides are related to 1T-TaS2, while Ta2Se2C resembles more MoS2, yet without its lubricating properties.
Online since: December 2013
Authors: Kun Yuan
Agostic hydrogen bond between Cu (I andII) and [2-hydroxy-1(S)-methyl]-containing N-methylglycine Kun Yuan College of Life-science and Chemistry, Tianshui Normal University, Tianshui, 741001, China Key Laboratory for New Molecule Materials Design and Function of Gansu Universities, Tianshui, 741001, China tsnuyk@163.com Keywords: Anion ligand; Agnostic bond; Geometric structures Abstract.
In the present study, the structures of [2-hydroxy-1(S)-methyl]-containing N-methylglycine···Cu(Ⅰ) and PT···Cu(Ⅱ) were investigated by quantum chemistry theoretical calculations.
Summary Agostic hydrogen bond interactions between Cu (I and II) and [2-hydroxy-1(S)-methyl]-containing N-methylglycine were discussed by using the quantum chemistry theory and method, the density function Becke, three-parameter, Lee-Yang-Parr, DFT/B3LYP/6-311G** computational level, especially discussed the geometry structure of the systems.
Vol. 26(2005), p. 3779 [7] Zhou G D, Duan L Y, The basis of structural chemistry, Beiking university press, 2002
Version 5.0, Madison, WI: Theoretical Chemistry Institute, University of Wisconsin, 2001 [14] Biegler-Koning F J, Derdau R, Bayles D.
Online since: August 2018
Authors: Dai Viet N. Vo, Nguyen Dai Hai, Long Giang Bach, Trinh Duy Nguyen, Tran Thien Hien, Nguyen Phu Thuong Nhan
Keywords: Fe-core/Au-shell magnetic, Multi-walled carbon nanotubes, MWNTs-Fe@Au nanohybrids, Click chemistry.
To date, the prosperous applications of these hybrid nanomaterials are due to their tailor-able composition, versatile structure, and improved stability and dispersity.
Figure 3A shows that the structure of the Fe@Au NPs was sighted to be core-shell, where the gold shell as bright regions on the dark iron cores is visualized.
Lim, Combination of surface initiated reversible addition fragmentation chain transfer polymerization, thiol-ene click chemistry and coordination chemistry for the fabrication of a novel photoluminescent hydroxyapatite nanohybrids, J.
Ziatdinov, Multi-Walled Carbon Nanotubes Synthesized by Methane Pyrolysis: Structure and Magnetic Properties, Sol.
Online since: December 2013
Authors: Yu Feng Li
China 2New Materials and Function Coordination Chemistry Lab, Qingdao University of Science & Technology, Qingdao, 266042, P.
Its crystal structure was determined by X-ray diffraction method.
Introduction Recent studies on π-conjugated derivative have acquired a growing importance in many areas of material chemistry.[1-3] In the chemistry of acid-based molecular materials, the π-stacking interaction highly affects the molecular aggregation and plays a crucial role in the electronic properties in the solid state.[4-6] To design highly π-stacking interaction, here we present the crystal structure and fluorescence of 4,4'-(o-sulfonicstyryl)biphenyl 4-methylpiperidine monohydrate.
Results and discussions The title complex crystal structure is shown in Fig.1.
The molecular structure stabilized by the C-H···π interactions and hydrogen bond.