scholarly journals Some insights into the reactivity of oxovanadium phosphate: Synthesis and characterization of an VOPO4-H2N(CH2)3NH2 coordination compound

2005 ◽  
Vol 70 (11) ◽  
pp. 1283-1290 ◽  
Author(s):  
Farias de ◽  
Claudio Airoldi
Keyword(s):  
Quantum Chemical Calculations ◽  
Coordination Compound ◽  
Elemental Analysis ◽  
Host Species ◽  
Quantum Chemical ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Patterns

The lamellar matrix of VOPO4?2H2O was used as the host species to prepare a VOPO4-1,3-diaminopropane coordination compound. The oxovanadium matrix and the synthesized hybrid were characterized by elemental analysis, infared spectroscopy, thermogravimetry, X-ray diffractometry and SEM microscopy. The elemental analysis results, as well as the X-ray diffraction patterns and quantum chemical calculations, strongly suggest that the synthesized matrix is an equimolar (1:1) mixture of two compounds with the formulas VOPO4?[H 2N-(CH2)3-NH2] and VOPO4?[H2N-(CH2)3-NH2]0.5. The SEM micrographs obtained for the VOPO4- diaminopropane hybrid matrix show that the microstructure of VOPO4?2H2O is changed after reaction, with an overall exfoliation of the oxovanadium matrix.

Synthesis and Characterization of Novel Inorganic Microporous Beryllophosphates

1992 ◽  
Vol 57 (4) ◽  
pp. 794-798 ◽  
Author(s):  
Long Yu ◽  
Wenqin Pang
Keyword(s):  
Ion Exchange ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Factors Affecting ◽  
X Ray ◽  
Earth Cation ◽  
Diffraction Patterns ◽  
Unique Framework ◽  
Exchange Properties

Five new types of microporous beryllophosphates were hydrothermally synthesized using BeO-P2O5-R-MCl (or MCl2)-H2O, R being cyclohexylamine (CHA), pyrrolidine, 1-butylamine or triethylamine, M alkali or alkali earth cation. X-Ray diffraction patterns (XRD), infrared (IR), TG-DT and elemental analysis show that the crystalline beryllophosphates have novel, unique framework structures, composed from basic units of tetrahedral PO4 and BeO4. These materials exhibit zeolite-like adsorption and ion-exchange properties. Factors affecting the product crystallization (as e.g. pH), type of cation and composition of reaction mixture are discussed.

Synthesis and Characterization of Srilankite Nanowires

2008 ◽  
Vol 8 (3) ◽  
pp. 1481-1488 ◽  
Author(s):  
Marguerite Germain ◽  
Philip Fraundorf ◽  
Sam Lin ◽  
Elena A. Guliants ◽  
Christopher E. Bunker ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Molar Ratios ◽  
Superlattice Structure ◽  
Titanate Nanowires ◽  
Alkaline Conditions ◽  
Diffraction Patterns

We describe the synthesis and characterization of srilankite (Ti2ZrO6) nanowires. The nanowires are produced via hydrothermal synthesis with a TiO2/ZrO2 mixture under alkaline conditions. The zirconium titanate nanowires have median diameters of 60 nm and median lengths of 800 nm with the 〈022〉 axis along the length of the nanowire. Electron microscopy, energy dispersive X-ray spectroscopy, powder X-ray diffraction, and electron diffraction are used to characterize the phases and compare nanowires produced with varying molar ratios of Ti and Zr. Electron diffraction patterns produced from single nanowires show highly crystalline nanowires displaying a compositional-ordering superlattice structure with Zr concentrated in bands within the crystal structure. This is in contrast to naturally occurring bulk srilankite where Zr and Ti are randomly substituted within the crystal lattice. Streaking is observed in the electron diffraction patterns suggesting short-range ordering within the superlattice structure.

Synthesis and Characterization of the nido-Platinaborane 7,7-(PPh3)2-7-PtB10H11-11-OC(O)Me

2011 ◽  
Vol 66 (4) ◽  
pp. 387-391
Author(s):  
Jinling Miao ◽  
Yong Nie ◽  
Haiyan Chen ◽  
Daqi Wang ◽  
Markus Enders ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Hydrogen Bonds ◽  
Single Crystal ◽  
Elemental Analysis ◽  
Chain Structure ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ir And Nmr Spectroscopy

The reaction of closo-B10H102− with PtCl2(PPh3)2 in the presence of MeCOSH afforded the title platinaborane nido-7,7-(PPh3)2-7-PtB10H11-11-OC(O)Me (1), which has been characterized by IR and NMR spectroscopy, MS, elemental analysis, and single-crystal X-ray diffraction. In contrast to the known products having exo-polyhedral Pt-S-C-O-B ring(s) from the same reaction with Ph- COSH, compound 1 has a B-acetoxy group on the open PtB4 face of the nido-PtB10 cluster. The structure of 1 features both intramolecular/intermolecular C-H· · ·O hydrogen bonds and intramolecular C-H· · ·H-B dihydrogen bonds, which link the molecules into a 1-D chain structure.

Synthesis and Characterization of a Three-dimensional Porous Compound: [Cu(H2O)6][{Cu(H2O)2}2{Cu(H2O)4H4W12O42}] · 12H2O

2008 ◽  
Vol 63 (2) ◽  
pp. 187-192 ◽  
Author(s):  
Chun-jing Zhang ◽  
Ya-guang Chen ◽  
Dong-mei Shi ◽  
Hai-jun Pang
Keyword(s):  
Aqueous Solution ◽  
Magnetic Susceptibility ◽  
Elemental Analysis ◽  
3D Structure ◽  
Three Dimensional ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Vis Spectroscopy

A novel transition metal polyoxotungstate, [Cu(H2O)6][{Cu(H2O)2}2{Cu(H2O)4H4W12O42}] · 12H2O (1), has been synthesized in aqueous solution and characterized by single-crystal X-ray diffraction, elemental analysis, IR and UV/vis spectroscopy, and TG analysis. The paradodecatungstate anions [H2W12O42]10− are linked by CuO6 octahedra, forming a three-dimensional (3D) structure. The magnetic susceptibility of compound 1 in the temperature range 2 - 300 K shows the presence of antiferromagnetic interactions within the uniform Cu2・ ・ ・Cu3 chains

Synthesis and characterization of a macrocyclic copper complex containing the 14-membered 1,3,5,8,10,12-hexaazacyclotetradecane unit

2017 ◽  
Vol 72 (2) ◽  
pp. 115-118 ◽  
Author(s):  
Mohammad Hakimi ◽  
Zahra Mardani ◽  
Keyvan Moeini ◽  
Fabian Mohr
Keyword(s):  
Raman Spectroscopy ◽  
Elemental Analysis ◽  
Copper Complex ◽  
Copper Atom ◽  
Octahedral Geometry ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir

AbstractIn this work, a new macrocyclic copper complex, [Cu(ACE)(SCN)2]; ACE: 1,3,6,10,12,15-hexaazatricyclo[13.3.1.16,10]eicosane, was prepared and characterized by elemental analysis, FT-IR, Raman spectroscopy and single-crystal X-ray diffraction. X-ray analysis of [Cu(ACE)(SCN)2] reveals an elongated octahedral geometry around the copper atom in a centrosymmetric CuN6 environment.

Synthesis and Characterization of a New Infinite 1D Polyoxomolybdate Polymer Further Connected via Cu(I) Nicotinate Subunits

2011 ◽  
Vol 66 (4) ◽  
pp. 351-s357
Author(s):  
Fabienne Gschwind ◽  
Martin Jansen
Keyword(s):  
Single Crystals ◽  
Polymer Chain ◽  
Elemental Analysis ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
3D Network

Single crystals of Cu(C6H4NO2)(C6H5NO2)(H2O)2[Mo2O6]n were grown hydrothermally and characterized by X-ray diffraction and elemental analysis. This compound shows a new 1 ∞{Mo2O8}4− infinite polymer chain, which is connected via copper(I) nicotinate subunits, forming an overall 3D network

scholarly journals SYNTHESIS AND CHARACTERIZATION OF SOME HYDRAZINEDERIVATIVES WITH Α, Β UNSATURATED ACIDS

2015 ◽  
Vol 2 (2) ◽  
pp. 16-22
Author(s):  
Manimekalai R ◽  
Kalpanadevi K ◽  
Anjutha Prabha N ◽  
Raina O
Keyword(s):  
Metal Ion ◽  
Nickel Complexes ◽  
Synthesis And Characterization ◽  
Metal Carboxylate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Patterns ◽  
Dta Studies ◽  
Cobalt And Nickel

Metal cinnamate monohydrazinates of the formula M(cin)2N2H4, where M= Co or Zn, nickel crotante monohydrazinate monohydrate Ni(crot)2N2H4.H2O, metal cinnamate and crotonate dihydrazinates M(cin)2(N2H4)2 Where M = Co, Ni, Zn or Cd , M(crot)2(N2H4)2 Where M = Co or Ni and cadmium crotante dihydrazinate monohydrate Cd(crot)2(N2H4)2.H2O have been prepared and characterized by spectral, thermal and X-ray diffraction studies. Electronic spectra indicate that the cobalt and nickel complexes are high-spin octahedral complexes. The IR data show that the binding of hydrazine and the unsaturated carboxylate anion to the metal ion is bidentate. TG-DTA studies show that metal complexes undergo decomposition through metal carboxylate intermediate to give respective metal oxide as the final product. Xray powder diffraction patterns of the complexes indicate isomorphism among them.

Synthesis and Characterization of CoMn2O4 Nanopowders by a Reverse Micelle Processing

2016 ◽  
Vol 868 ◽  
pp. 105-110
Author(s):  
Dong Sik Bae
Keyword(s):  
Reverse Micelle ◽  
Molar Ratio ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Xrd Diffraction ◽  
Transmission Electron ◽  
Diffraction Patterns ◽  
Average Size

CoMn2O4 nanoparticles were synthesized by reverse micelle processing from the mixed precursor (consisting of Co (NO3)2 ·6H2O and MnCl2·4H2O). The CoMn2O4 was prepared by mixing the aqueous solution at a molar ratio of Co : Mn = 1 : 2. The synthesized powders were calcined at 600°C for 2h. The average size and distribution of synthesized powders were in the range of 10-20nm and narrow, respectively. The average size of the synthesized powders increased with increasing water to surfactant molar ratio. The XRD diffraction patterns show that the phase of CoMn2O4 was spinel (JCPDS no.77-0471). The synthesized and calcined powders were characterized by thermogravimetry-differential scanning calorimeter (TG-DSC), X-ray diffraction analysis (XRD) and transmission electron microscopy (TEM). The magnetic property of the powder was measured by Vibrating Sample Magneto-meter (VSM) at 298K. The effect of synthesis parameter, such as the molar ratio of water to surfactant, is discussed.

scholarly journals Synthesis and characterization of the new two-dimensional Heisenberg antiferromagnet double perovskite BaLaCuSbO6

2015 ◽  
Vol 44 (23) ◽  
pp. 10860-10866 ◽  
Author(s):  
M. Cecilia Blanco ◽  
Sergio Alexis Paz ◽  
Vivian M. Nassif ◽  
Julio J. Guimpel ◽  
Raúl E. Carbonio
Keyword(s):  
Magnetic Susceptibility ◽  
Double Perovskite ◽  
Synthesis And Characterization ◽  
Two Dimensional ◽  
Heisenberg Antiferromagnet ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Patterns

Powder X-ray diffraction patterns, magnetic susceptibility as a function of temperature, and polyhedral representation along the c-axis of the BaLaCuSbO6 double perovskite have been reported.

Synthesis and characterization of 1,2,3,4 tetrahydroquinoline intercalated into MoS2 in search of cleaner fuels

2007 ◽  
Vol 22 (10) ◽  
pp. 2747-2757 ◽  
Author(s):  
Karina Castillo ◽  
Felicia Manciu ◽  
J.G. Parsons ◽  
Russell R. Chianelli
Keyword(s):  
Fine Structure ◽  
Infrared Spectroscopy ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Coordination Numbers ◽  
Absorption Fine ◽  
Diffraction Patterns ◽  
X Ray Absorption

Two different morphologies of MoS2 (short and long sheets) were utilized to elucidate the intercalation mechanism of 1,2,3,4 tetrahydroquinoline (THQ). MoS2 (short sheets) and molybdenite (MB) (long sheets) were exfoliated and restacked in the presence of THQ. The x-ray diffraction patterns of both samples show a new reflection in the 001 plane, which implies a lowering of symmetry and corresponds to an expansion of the layers by approximately 12.3 Å. In the MoS2-THQ sample, 80% of the MoS2 was intercalated and 20% remained stacked. In the MB-THQ sample, 30% of MB was intercalated while 70% remained stacked. X-ray absorption structure (XAS) studies showed changes in atomic geometry and coordination. The x-ray absorption near-edge spectra showed shifts in the geometry of the intercalated MoS2 and MB sample compared to the unintercalated samples. Extended x-ray absorption fine structure studies showed lower coordination numbers compared to the untreated samples. Infrared spectroscopy characterization of these same samples suggests intercalation and partial dehydrogenation of the THQ.

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