جستجوی مقالات مرتبط با کلیدواژه "ساختار بلوری" در نشریات گروه "زمین شناسی"

A supramolecular compound of vanadium (V) with [(CH3)2NH2]4[V16O42](SO4).2(O)[+solvent] formula (1) was crystallized in the tetragonal crystal system, space group P42/nnm with Z=2. The final R value of compound 1 is 0.048 for 2214 independent reflections. The asymmetric unit of 1 consists of a half of the dimethylammonium cation, a quarter of sulfate anion, a part of vanadium cluster, and water molecules. In the supramolecular structure of compound 1, each dimethyl ammonium cation is bridged between two polyoxovanadate clusters through hydrogen bonds and sulfate anions play a key role as the tetragonal supramolecular structure extends along these anions.

In this research, a new compound of tetramethyl-3,3ʹ,3ʺ,3ʺʹ-(propane-1,2-diylbis(azanetriyl))tetrapropionate (TPAT) was prepared from the reaction of propane-1,2-diamine and methyl acrylate in methanol solvent. The composition of TPAT in the base environment, simultaneously with the formation of the complex, was reaction to the ligand 3,3ʹ,3ʺ,3ʺʹ-(propane-1,2-diylbis(azanetriyl))tetrapropanoic acid (H4PAT). 3,3ʹ,3ʺ,3ʺʹ-(propane-1,2-diylbis(azanetriyl))tetrapropionate copper(II) complex [Cu(H2PAT)] was identified by FT-IR, 1H NMR spectroscopy, elemental analysis (CHN) and its structure was determined by X-ray single crystal. H4PAT ligand is coordinated to copper atom through two nitrogen atoms, two oxygen atoms from propionate ion and one carbonyl group from propanoic acid and has a distorted square pyramidal geometry. This complex is crystallized in orthorhombic crystal system with space group Pna21 and Z=4 with a=14.1429(8) Å, b=14.1429(8) Å and c=9.9781(3) Å. The catalytic application of this complex was investigated. 2 mmol of [Cu(H2PAT)] complex was used for the coupling of phenyl bromide, under reflux conditions, without solvent in 120 minutes, and the biphenyl product was formed with 80% efficiency.

N1-)3- Pyridine-2-yl-Methylene)Amino)propyl)ethane-1 and 2-diamine four-dentate ligand with molecular formula of C11H18N4 using the compression reaction of Pyridine-2-Carbaldehyde with 1,6-Diamino-3-Aza haxane with a molar ratio of 1: 1 was prepared having 65% yield and then the complex of this ligand with copper (II) bromide was synthesized and characterized. FT-IR and elemental analysis and single crystal X-ray diffraction techniques were used for characterization of the complex. The results show that this complex crystallizes in a triclinic system with a P  space group and has a deviated square pyramid structure. Furthermore, there are intermolecular hydrogen bonds in the crystal lattice of this complex. In these bonds, carbon and nitrogen atoms act as hydrogen bond donors, halide atoms act as hydrogen bond acceptors and oxygen atoms act as both donor and receiver.

A new azo-Schiff base"Ethyl 2-((E)-(4-((E)-(4-ethylphenyl)diazenyl)-2-hydroxybenzylidene)amino)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate" was prepared by the reaction of "Ethyl 2-amino-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate" and "(E)-5-((4-ethylphenyl)diazenyl)-2-hydroxybenz aldehyde" (1:1 molar ratio) in MeOH under reflux condition. The structure of compound was studied by elemental analysis, including IR and 1HNMR spectroscopy and single crystal X-ray diffraction method. The synthesized compound has been crystallized in triclinic system with Pī space group and a = 9.752 (2)Å, b = 10.349(2)Å, c = 13.263(3)Å, α = 87.72(3)˚, β = 75.80(3)˚, γ = 62.21(3)˚ cell parameters. The final R value is 0.098 for 4038 independent reflections. X-ray diffraction results confirm the planar geometric structure with a slight deviation and intermolecular hydrogen bond for the compound.

In this paper, the bismuth vanadate (BiVO4) nanoparticles were synthesized at 600 °C calcination temperature by co-precipitation method. To study the crystal structure, morphology, optical and photocatalytic properties of the samples, the X-ray diffraction analysis, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy and ultraviolet– visible spectroscopy were used. The X-ray diffraction patterns were indicated that the BiVO4 samples have a monoclinic structure. The ultraviolet-visible analysis was revealed the BiVO4 samples have an optical band gap in the visible light range. The photocatalytic activities of the synthesized BiVO4 were evaluated by photodegradation of Congo red under visible light irradiation. According to the results of the analysis, the synthesized nanoparticles is a good choice for the degradation of organic matter into the sunlight.

1-Phenyl-1,2-ethanediol was synthesized from the hydrolysis of epoxy styrene in water medium. The compound was characterized by FT-IR and NMR spectroscopic methods and structure was characterized by single crystal X-ray diffraction method. The crystallographic information was collected at 293 K. This compound is crystallized in the triclinic  space group with unit cell parameters of a = 6.0274(10) Å, b = 16.204(2) Å, c = 17.345(2) Å; α = 117.584(14)°, β = 99.322(13)°, γ = 90.047 (14)°, V = 1476.1 (4) Å3 and Z = 8. The asymmetric unit of the crystal structure consists of four molecules of 1-phenyl-1,2-ethanediol which are connected to each other by strong hydrogen bond and C-H∙∙∙π interactions. A supramolecular network is generated by intermolecular O-H∙∙∙O and C-H∙∙∙O hydrogen bond interactions.

A new tetraorganotin(IV) complex, {bis(µ3-oxo)-bis(µ-isopropoxo)-dichloro-octakis(4-methyl)-tetra-tin, has been synthesized by dimethyltin dichloride in the presence of potassium iso peroxide. This Complex with a general formula of {(CH3)8Sn4Cl2(C3H7O)2O2} is classified in the category of tetraorganodistannoxanes. Solid state crystal structure of this compound  was determined  by single crystal X-ray diffraction. The titled complex is centerosymmetric and exists as a tetranuclear molecule which involves three staircase rings with a Sn4O4 core. The asymmetric unit of the complex contains two atoms of tin (IV) and an infinite two-dimensional structure is formed by CH...Cl interactions between tetranuclear units. Two types of bridged oxygen are present in this compound. One of them has an alkoxide nature and the other one is a bridge between three tin centers. The results of studies on tin multi-core systems have shown that in addition to the bulk effect, the size and the nature of different attached organic groups, the nature of the participating ligands in coordination environment influence the physical and chemical properties of these compounds.

N'-(2-hydroxy-3-methoxybenzylidene)-4-methylbenzenesulfonohydrazide (1) was prepared by the reaction of p-Toluenesulfonyl hydrazide and 2-hydroxy-3-methoxy benzaldehyde (1:1 molar ratio) in ethanol under reflux condition. The crystal structure of the compound was determined by X-ray crystallography. Crystal data for 1 at -100 K: space group C/2c with: a = 15.807(1) Å, b = 10.457(1) Å, c = 20.779(1) Å, β = 109.68º (1). The final R value is 0.0574 for 3155 independent reflection. The N -H …O hydrogen bond converts the molecules into an infinite chain along [010].

9-aminoacridinum acridine-9-carboxylate (1) as a proton transfer ion pair was obtained by the reaction of 9-aminoacridine, acridine-9-carboxylic acid and zinc nitrate (1:1:1 molar ratio) in solvents mixture H2O/MeOH under reflux condition. The crystal structure of this compound was determined by elemental analysis, IR spectroscopy and single crystal X-ray diffraction method. Crystallographic data for 1 was collected at 100 K.  The synthesized compound has been crystallized in monoclinic system with C2/c space group and a = 15.336 (9), b = 14.342(8), c = 19.481(1), β= 109.057(1) cell parameters. The final R value is 0.044 for 4425 independent reflections. There are various types of ionic and non-covalent interactions including N–H∙∙∙O hydrogen bonding, π-π stacking, and cationic-anionic interactions in the crystal structure of (1). This interactions play important role in the expansion of 3D network of (1).