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Online since: October 2006
Authors: Karin Popa, Rudy J.M. Konings, Daniel Bouëxière, A. Florin Popa, T. Geisler
In agreement with previous studies, the BaM
IV(PO4)2 (M
IV
= Ti, Zr, Hf, Ge and Sn) compounds crystallize in the C1 2/m 1 space group (yavapaiite structure),
while BaTh(PO4)2 exhibit a different structure.
That makes us expect that for bigger M IV cations, the yavapaiite structure will 'collapse' in monazite structure or a different one.
The crystal structure of the room temperature polymorph (Fig. 2) was refined using the monoclinic structure type of KFe(SO4)2 (space group C1 2/m 1).
Montel et al. [13] indexed the obtained compounds on the basis of a monoclinic monazite structure or an 'double brabantite' structure, whereas Brandel et al. [14] propose a new structure for the compound with Ba/Th = 1.12.
Bamberger: Phosphates of transuranium elements, in Handbook on the Physics and Chemistry of the Actinides, vol.
That makes us expect that for bigger M IV cations, the yavapaiite structure will 'collapse' in monazite structure or a different one.
The crystal structure of the room temperature polymorph (Fig. 2) was refined using the monoclinic structure type of KFe(SO4)2 (space group C1 2/m 1).
Montel et al. [13] indexed the obtained compounds on the basis of a monoclinic monazite structure or an 'double brabantite' structure, whereas Brandel et al. [14] propose a new structure for the compound with Ba/Th = 1.12.
Bamberger: Phosphates of transuranium elements, in Handbook on the Physics and Chemistry of the Actinides, vol.
Online since: June 2014
Authors: Erizal Erizal, Sri Mulijani, Tun Tedja Irawadi, Tyas Cipta Katresna
This behavior may be due to both chemical and physical structure of BC.
Cellulose Nanocrystals: Chemistry, Self-Assembly, and Applications.
Chemistry and Applications of Nanocrystalline Cellulose and Its Derivatives: A Nanotechnology Perspective.
Journal of Materials Chemistry,.
African Journal of Pure and Applied Chemistry Vol. 5(5), pp. 111-118. (2011)
Cellulose Nanocrystals: Chemistry, Self-Assembly, and Applications.
Chemistry and Applications of Nanocrystalline Cellulose and Its Derivatives: A Nanotechnology Perspective.
Journal of Materials Chemistry,.
African Journal of Pure and Applied Chemistry Vol. 5(5), pp. 111-118. (2011)
Online since: May 2014
Authors: Sun Ig Hong, J. Suresh, M. Sundrarajan, R. Yuvakkumar
In the present investigation, green chemistry route for the synthesis of magnesium oxide nanoparticles using extract derived from Nephelium lappaceum L peels are described employing XRD, SEM-EDX and PSA analysis.
The observed sharp peak in Fig. 1a confirms the existence of the crystalline phase of face-centered cubic structure as well attribute.
The sharp well-oriented crystalline peaks (111), (200) (220), (311) and (222) indicate the formation of crystalline face-centered cubic structure of magnesium.
Kannan, A New Approach to Preparing Crystalline Nano Molybdenum Particles, Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry 41 (2011) 309–314
Prabu, Influence of nano nutrients on heterocyst forming cyanobacterium Anabaena ambigua Rao, Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry 41 (2011) 1234–1239
The observed sharp peak in Fig. 1a confirms the existence of the crystalline phase of face-centered cubic structure as well attribute.
The sharp well-oriented crystalline peaks (111), (200) (220), (311) and (222) indicate the formation of crystalline face-centered cubic structure of magnesium.
Kannan, A New Approach to Preparing Crystalline Nano Molybdenum Particles, Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry 41 (2011) 309–314
Prabu, Influence of nano nutrients on heterocyst forming cyanobacterium Anabaena ambigua Rao, Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry 41 (2011) 1234–1239
Online since: April 2012
Authors: Michael Zinigrad, Moshe Eliaszade, Svetlana Lugovskoy
Fig.1 Lignin Structure
Lignin is a mixture of irregular co-polymers, whose typical structure blocks are shown in Fig. 1.
It was established that in the course of MCA lignin structure deformation takes place, but this deformation does not cause any essential distortions in the hydrogen bond lattice. 2.
Mechanochemically activated lignin obtained by a “green chemistry” method is a cheap sorbent for the extraction of metal ions and (di-)chromate ions from waste waters.
N.: Chemistry of Natural Compounds Vol. 42 (2006), p. 479
Chemistry of lignin.
It was established that in the course of MCA lignin structure deformation takes place, but this deformation does not cause any essential distortions in the hydrogen bond lattice. 2.
Mechanochemically activated lignin obtained by a “green chemistry” method is a cheap sorbent for the extraction of metal ions and (di-)chromate ions from waste waters.
N.: Chemistry of Natural Compounds Vol. 42 (2006), p. 479
Chemistry of lignin.
Online since: February 2011
Authors: Bao Zhong Du, Wei Luo, Ru Min Wang
The application of hydrotalcites in medicinal chemistry has been recently reviewed[13].
It is also shows that the sample has formed a supramolecular structure of the host(LDH)–guest(theophylline).
Solid-State Supramolecular Chemistry: Two and Three dimensional Inorganic Networks, of Comprehensive Supramolecular Chemistry, in: Alberti, G., Bein, T.
Intercalation chemistry of layered double hydroxides: recent developments and applications.
Fine tuning between organic and inorganic host structure: new trends in layered double hydroxide hybrid assemblies.
It is also shows that the sample has formed a supramolecular structure of the host(LDH)–guest(theophylline).
Solid-State Supramolecular Chemistry: Two and Three dimensional Inorganic Networks, of Comprehensive Supramolecular Chemistry, in: Alberti, G., Bein, T.
Intercalation chemistry of layered double hydroxides: recent developments and applications.
Fine tuning between organic and inorganic host structure: new trends in layered double hydroxide hybrid assemblies.
Online since: July 2014
Authors: Lin Wang, Jing Wen Fu, Wen Jing Cui, Dong Yu Zhao
The rich diversity of compositions, structures and properties of metallic alloys, has led to widespread applications in electronics, engineering and catalysis.
The desire to fabricate materials with well defined, controllable, properties and structures, on the nanometre scale, coupled with the flexibility afforded by intermetallic materials, has generated interest in bimetallic alloy clusters, or ‘‘nanoalloys’’.
The SEM photograph and XRD analysis showed that the composite structure of the nano silver-nickel alloy particles were wrapped by PANI, the particles increase, and orderly rod, which was due to the polyaniline and nano alloys particles were bonded, the of nano-alloy particles were hinded agglomeration by the PANI adsorbed on the surface.
Pearson, The Crystal Chemistry and Physics of Metals and Alloys, Wiley, New York, 1972
Raithby (Eds.), Metal Clusters in Chemistry, vol. 2, Wiley–VCH, Weinheim, 1999, p. 1194
The desire to fabricate materials with well defined, controllable, properties and structures, on the nanometre scale, coupled with the flexibility afforded by intermetallic materials, has generated interest in bimetallic alloy clusters, or ‘‘nanoalloys’’.
The SEM photograph and XRD analysis showed that the composite structure of the nano silver-nickel alloy particles were wrapped by PANI, the particles increase, and orderly rod, which was due to the polyaniline and nano alloys particles were bonded, the of nano-alloy particles were hinded agglomeration by the PANI adsorbed on the surface.
Pearson, The Crystal Chemistry and Physics of Metals and Alloys, Wiley, New York, 1972
Raithby (Eds.), Metal Clusters in Chemistry, vol. 2, Wiley–VCH, Weinheim, 1999, p. 1194
Online since: January 2012
Authors: Heng Li
The Synthesis and Ion-exchange Property of Li+ Memorized Spinel Li2.5Ti1.375O4
Jinhe Jiang
MicroScale Science Institute , Department of Chemistry and Chemical Engineering ,Weifang University, Weifang, 261061,China
Corresponding author.
In this paper, the discussion is about the synthesis, structure and ion exchange of the Li-Ti composite oxide inorganic ion exchanger of Li+ with the ability of memory and spinel structure.
The structure of compound metal oxide Li2.5Ti1.375O4 crystallized at 775℃ was much perfect.
Rare Metal. 1999,18(2),143 [2] Z.S.Peng, Y.S.Yan, C.Y.Jiang, C.R.Wan, H.C.Gao: Advance on extraction lithium from salt lake, J.Chemistry Online. 1997,(12),11 [3] Y.F.Liu, Q.Feng, Kenta Ool: Li extraction/insertion reaction with LiAlMnO4 and LiFeMnO4 spinels in the Aqueous phase, J.Journal of Colloid and Interface Science. 1994,163(1),130 [4] H.Zhong: Prpperty of H2TiO3 type ion-exchangers and extraction of lithium from brine of natural gas wells, J.Chinese Journal of Applied Chemistry. 2000,17(3),307
In this paper, the discussion is about the synthesis, structure and ion exchange of the Li-Ti composite oxide inorganic ion exchanger of Li+ with the ability of memory and spinel structure.
The structure of compound metal oxide Li2.5Ti1.375O4 crystallized at 775℃ was much perfect.
Rare Metal. 1999,18(2),143 [2] Z.S.Peng, Y.S.Yan, C.Y.Jiang, C.R.Wan, H.C.Gao: Advance on extraction lithium from salt lake, J.Chemistry Online. 1997,(12),11 [3] Y.F.Liu, Q.Feng, Kenta Ool: Li extraction/insertion reaction with LiAlMnO4 and LiFeMnO4 spinels in the Aqueous phase, J.Journal of Colloid and Interface Science. 1994,163(1),130 [4] H.Zhong: Prpperty of H2TiO3 type ion-exchangers and extraction of lithium from brine of natural gas wells, J.Chinese Journal of Applied Chemistry. 2000,17(3),307
Online since: August 2008
Authors: Pisith Singjai, S. Meejoo, U. Rinzin, P. Wilairat
There is no evidence indicating that the pore structure and layer surfaces at both ends of the
mech-MWNTs are appropriate sites for metal ions adsorption.
The large adsorption capacity of CNTs is mainly attributed to their pore structure, surface area and the existence of various types of surface functional groups.
In this work, the structure and adsorption behaviors of as received MWNTs have been investigated in comparison to those of catalyst free MWNTs, denoted as cf-MWNTs, and mechanochemical treated MWNTs, denoted as mech-MWNTs.
Nevertheless, TEM images showed that the mech-MWNTs is still of tabular structure with opened ends.
Acknowledgment This work was supported by the Center of Innovation in Chemistry: Postgraduate Education and Research Program in Chemistry (PERCH-CIC), Thailand Research Fund (Grant #MRG5080059) and the Commission of Higher Education.
The large adsorption capacity of CNTs is mainly attributed to their pore structure, surface area and the existence of various types of surface functional groups.
In this work, the structure and adsorption behaviors of as received MWNTs have been investigated in comparison to those of catalyst free MWNTs, denoted as cf-MWNTs, and mechanochemical treated MWNTs, denoted as mech-MWNTs.
Nevertheless, TEM images showed that the mech-MWNTs is still of tabular structure with opened ends.
Acknowledgment This work was supported by the Center of Innovation in Chemistry: Postgraduate Education and Research Program in Chemistry (PERCH-CIC), Thailand Research Fund (Grant #MRG5080059) and the Commission of Higher Education.
Online since: July 2011
Authors: Jin Bing Zhang, Gui Mei Shi, Da Wei Yu
This structure can prevent Co nanoparticles from oxidation and agglomeration.
It is well know that B4C is a kind of against corrosion, high melting point and chemistry stability material, thus, the Co nanocapsules with the shell of B4C are successfully prepared by arc-discharging a Co-B amorphous alloy in ethanol and argon atmosphere in this work.
The anode was composed of nano Co-B amorphous alloy powders prepared by solid state chemistry reaction process [8], where the powders were pressed into a cylinder.
HRTEM studies revealed that almost all as-prepared nanoparticles have a core/shell structure, the core consists of Co nanoparticle and the shell is B4C/C.
Microstructural analysis (XPS, XRD and HRTEM) showed that the particles have core-shell structure, with the core of Co grains and the shell of B4C/C composite.
It is well know that B4C is a kind of against corrosion, high melting point and chemistry stability material, thus, the Co nanocapsules with the shell of B4C are successfully prepared by arc-discharging a Co-B amorphous alloy in ethanol and argon atmosphere in this work.
The anode was composed of nano Co-B amorphous alloy powders prepared by solid state chemistry reaction process [8], where the powders were pressed into a cylinder.
HRTEM studies revealed that almost all as-prepared nanoparticles have a core/shell structure, the core consists of Co nanoparticle and the shell is B4C/C.
Microstructural analysis (XPS, XRD and HRTEM) showed that the particles have core-shell structure, with the core of Co grains and the shell of B4C/C composite.
Online since: September 2011
Authors: Yu Ting Liu, Da Wei Yin, Xiao Ming Sun
Ferrocene-Based Antibacterial Agents: Synthesis, Characterization, and Biological Evaluation of Metal (II) Complexes with Glycine-Derived Compounds
Yuting Liu1, a*, Xiaoming Sun1, b, Dawei Yin1, c
(1Key laboratory of Auxiliary Chemistry & technology for Chemical Industry, Ministry of Education, College of Chemistry & Chemical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, People’s Republic of China)
a lyt@sust.edu.cn b yiseliedaweiwang@126.com c ziyounvshenyadianna@126.com
Keyword: ferrocene glycine Schiff bases antibacterial complex
Abstract: A series of Ferrocene Schiff bases derived from glycine and their cobalt (II), copper (II), nickel (II), and zinc (II) metal complexes have been synthesized and characterized by IR, 1H NMR, MS and elemental analysis, the results conformed well with expected structures.
Introduction Since its discovery fifty years ago, the chemistry of ferrocene has developed dramatically.
The structure of the ligand and their metal complexes (Scheme 1) has been confirmed by IR, 1H NMR, MS and elemental analysis.
Org Chemistry.
Bioinorganic Chemistry and Applications Vol.12 (2006), p.1
Introduction Since its discovery fifty years ago, the chemistry of ferrocene has developed dramatically.
The structure of the ligand and their metal complexes (Scheme 1) has been confirmed by IR, 1H NMR, MS and elemental analysis.
Org Chemistry.
Bioinorganic Chemistry and Applications Vol.12 (2006), p.1