scholarly journals Five Dinuclear Lanthanide Complexes Based on 2,4-dimethylbenzoic Acid and 5,5′-dimethy-2,2′-bipyridine: Crystal Structures, Thermal Behaviour and Luminescent Property

2021 ◽  
Vol 9 ◽  
Author(s):  
Jia-Yuan Zhao ◽  
Ning Ren ◽  
Ying-Ying Zhang ◽  
Kun Tang ◽  
Jian-Jun Zhang
Keyword(s):  
Crystal Structures ◽  
Lanthanide Complexes ◽  
Hydrothermal Reaction ◽  
Luminescent Properties ◽  
Thermal Decomposition Mechanism ◽  
Binuclear Complexes ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
X Ray

A series of new complexes, [Ln (2,4-DMBA)3(5,5′-DM-2,2′-bipy)]2 (Ln = Sm(1), Eu (2)), [Pr (2,4-DMBA)3 (5,5′-DM-2,2′-bipy)]2·0.5(C2H5OH) (3), [Ln (2,4-DMBA)3 (5,5′-DM-2,2′-bipy)]2·0.5(2,4-DMBAH)·0.25(5,5′-DM-2,2′-bipy) (Ln = Tb (4), Dy (5)) (2,4-DMBA = 2,4-dimethylbenzoate, 5,5′-DM-2,2′-bipy = 5,5′-dimethy-2,2′-bipyridine) were synthesized via hydrothermal reaction conditions. The complexes were characterized through elemental analysis, Infrared spectra (IR), Raman (R) spectra, UV-Vis spectra, single X-ray diffraction. Single crystal data show that complexes 1–5 are binuclear complexes, but they can be divided into three different crystal structures. The thermal decomposition mechanism of complexes 1–5 were investigated by the technology of simultaneous TG/DSC-FTIR. What’s more, the luminescent properties of complexes 1–2 and 4 were discussed, and the luminescence lifetime (τ) of complexes 2 and 4 were calculated.

Lewis-Base Adducts of Group 1B Metal(I) Compounds. XXI The Crystal and Molecular Structures of the Unsolvated Forms of Dibromotris(triphenylphosphine)dicopper(I) and 'step' Tetrabromotetrakis(triphenyl-phosphine)tetracopper(I)

1985 ◽  
Vol 38 (8) ◽  
pp. 1243 ◽  
Author(s):  
JC Dyason ◽  
LM Engelhardt ◽  
C Pakawatchai ◽  
PC Healy ◽  
AH White
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
Molecular Structures ◽  
Lewis Base ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Triphenyl Phosphine ◽  
X Ray ◽  
Crystal And Molecular Structures

The crystal structures of the title compounds have been determined by single-crystal X-ray diffraction methods at 295 K. Crystal data for (PPh3)2CuBr2Cu(PPh3) (1) show that the crystals are iso-morphous with the previously studied chloro analogue, being monoclinic, P21/c, a 19.390(8), b 9.912(5), c 26.979(9) Ǻ, β 112,33(3)°; R 0.043 for No 3444. Cu( trigonal )- P;Br respectively are 2.191(3); 2.409(2), 2.364(2) Ǻ. Cu(tetrahedral)- P;Br respectively are 2.241(3), 2.249(3); 2.550(2), 2.571(2) Ǻ. Crystals of 'step' [PPh3CuBr]4 (2) are isomorphous with the solvated bromo and unsolvated iodo analogues, being monoclinic, C2/c, a 25.687(10), b 16.084(7), c 17.815(9) Ǻ, β 110.92(3)°; R 0.072 for No 3055. Cu( trigonal )- P;Br respectively are 2.206(5); 2.371(3), 2.427(2) Ǻ. Cu(tetrahedral)- P;Br are 2.207(4); 2.446(2), 2.676(3), 2.515(3) Ǻ.

Evolution of Crystalline Phase and Morphology of the Products Formed during the Hydrothermal Synthesis of Y2O3 Powders

2011 ◽  
Vol 189-193 ◽  
pp. 1275-1279
Author(s):  
Ying Wang ◽  
Gao Yang Zhao ◽  
Li Yuan
Keyword(s):  
Electron Microscopy ◽  
Hydrothermal Treatment ◽  
Crystalline Phase ◽  
Hydrothermal Reaction ◽  
Yttrium Nitrate ◽  
Temperature Reaction ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
X Ray ◽  
Transmission Electron

The crystalline phase and morphology of the products formed during the synthesis of yttrium oxide via the hydrothermal treatment yttrium nitrate were characterized by X-ray diffraction, transmission electron microscopy and scanning electron microscopy. Products with high OH/NO3ratios are formed with the increasing of hydrothermal treatment. The crystalline phases are evolved from Y2(OH)5.14(NO3)0.86•H2O toY4O(OH)9(NO3) and finally Y(OH)3. The hydrothermal reaction conditions play an important role in the synthesis of the microstructures. Results show the particle size and final morphology of samples could be controlled by reaction temperature, reaction time, and OH-concentration. Sheets, hexagonal and needle-like Y2O3powders are obtained with the hydrothermal treatment of yittrium nitrate at 180 oC to 200oC for 2-8 hours at pH 9-13.

Crystal Structures and Stability of Two Bipyridyl Complexes of Metal Chloroacetates

2007 ◽  
Vol 62 (10) ◽  
pp. 1271-1276 ◽  
Author(s):  
Liang Chen ◽  
Xian-Wen Wanga ◽  
Jing-Zhong Chen ◽  
Jian-Hong Liu
Keyword(s):  
Binuclear Complexes ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Reaction Conditions ◽  
Triclinic Space Group ◽  
Space Group ◽  
X Ray ◽  
Cell Parameters ◽  
Dimensional Network

The complexes Mn(Cl3CCOO)2(4,4′-bpy) (1) and [Cu2(ClCH2COO)(2,2′-bpy)2(OH)(H2O)]-(NO3)2(2) (bpy = bipyridine) were generated under mild reaction conditions and characterized by IR spectra, thermogravimetric analysis (TGA), X-ray powder diffraction (XRD), and single crystal X-ray diffraction. Compound 1 exhibits a two-dimensional network with octahedrally coordinated Mn(II) atoms linked by 4,4′-bpy ligands and Cl3COO− ligands. Compound 2 features a supramolecular structure of binuclear complexes, with edge-sharing five-coordinated square-pyramidal units bridged by the ClCH2COO− ligand, an OH− group and a water molecule. Complex 1 crystallizes in the orthorhombic space group Pbcn with cell parameters: a = 16.5390(17), b = 11.6396(17), c = 9.9181(12) Å, V = 1909.3(4) Å3, Z = 4, wR2 = 0.1576. Complex 2 crystallizes in the triclinic space group P1̅ with cell parameters: a = 7.6190(15), b = 11.151(2), c = 16.640(3) Å , α = 73.13(3), β = 80.89(3), γ = 74.51(3)°, V = 1298.73(4) Å3, Z = 2, wR2 = 0.1265.

Synthesis and Luminescent Properties of Y2O3:Eu3+ Nanocrystal by the Ultrasonic Method

2011 ◽  
Vol 399-401 ◽  
pp. 921-925
Author(s):  
Hong Quan Yu ◽  
Hong Dan Wang ◽  
Tao Li ◽  
Bao Jiu Chen
Keyword(s):  
Ultrasonic Method ◽  
Luminescent Properties ◽  
Close Relation ◽  
Research Progress ◽  
Good Prospect ◽  
Ultrasonic Power ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
X Ray ◽  
Annealing Conditions

Rare-earth luminescence materials in lighting the tube and the field emission fields has been widely applied.In the leds, special security lights and energy-saving lighting are in the areas of infinite good prospect, this paper the research progress of preparation and a concrete discussion . The ultrasonic method for Y2O3:Eu3+ nanocrystal, annealing conditions on the Y2O3:Eu3+ nanocrystal particles size, crystal condition and the influence of the luminescence properties.The properties of the Y2O3:Eu3+ complexes were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Reaction conditions, such as ultrasonic power and the temperature were found to have close relation with the morphologies of final products.

Sn94– Zintl Ions as Reactive Precursor for Neat Solids: Syntheses and Crystal Structures of Rb4[SnTe4], KxCs4–x[SnTe4], and KxCs10–x[Sn4Te12]

2009 ◽  
Vol 64 (11-12) ◽  
pp. 1319-1324 ◽  
Author(s):  
Jian-Qiang Wang ◽  
Viktor Hlukhyy ◽  
Thomas F. Fässler
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
X Ray Diffraction ◽  
Compound K ◽  
Reaction Conditions ◽  
Elemental Tellurium ◽  
X Ray ◽  
Zintl Ions ◽  
Tetrahedral Anion

The reactions of Zintl ions Sn94− formed in ethylenediamine solutions of K2Cs2Sn9 and Rb4Sn9 with elemental tellurium have been investigated. Addition of elemental tellurium to the filtrates of these solutions leads - depending on the reaction conditions - to four different products: Compounds K0.36(1)Cs3.64(1)[SnTe4] (1) and Rb4[SnTe4] (2) contain the tetrahedral anion [SnTe4]4−, and Cs4[Sn2Te7] (3) features the anion [Te2Sn(μ-Te)(μ-Te2)SnTe2]4−, whereas a novel Zintl anion [Sn4Te12]10− is present in compound K0.44(1)Cs9.56(1)[Sn4Te12] (4). Compounds 1, 2 and 4 have been structurally characterized by single-crystal X-ray diffraction

scholarly journals Garcinia Mangostana Peel Extract as Sustainable Fuel Source on Ceria Synthesis under Hydrothermal Condition

2019 ◽  
Vol 8 (3) ◽  
pp. 255-261
Author(s):  
Salprima Yudha S ◽  
◽  
Morina Adfa ◽  
Aswin Falahudin ◽  
Deni Agus Triawan ◽  
...  
Keyword(s):  
Crystal Size ◽  
Hydrothermal Reaction ◽  
Hydrothermal Condition ◽  
Fluorite Structure ◽  
X Ray Diffraction ◽  
Garcinia Mangostana ◽  
Reaction Conditions ◽  
Xrd Pattern ◽  
X Ray ◽  
Fuel Source

Cerium (IV) oxide or ceria (CeO2) was fabricated by heating an aqueous extract of Garcinia mangostana and cerium (III) nitrate in hydrothermal autoclave reactor at 200 °C for 3 hours, followed by calcination at 600 °C for 5 hours. The powder X-ray diffraction (XRD) pattern of the precipitate from cerium(III) nitrate under hydrothermal reaction conditions shows no clear XRD peaks, indicating its amorphous nature. In contrast, the products from the calcinated samples exhibit XRD peaks, which correspond to cubic fluorite structure with an average crystal size of 7.55 nm. The elemental mapping using the energy-dispersive X-ray (EDX) analysis reveals the main elements present were cerium and oxygen, with minor impurities in low amounts. The presence of Garcinia mangostana extract is predicted to be the key component and fuel source to obtain CeO2 particles with narrow crystal size.

Crystal structure of Sc3Co1.64In4 and Sc10Co9In20 from single-crystal data

2019 ◽  
Vol 74 (3) ◽  
pp. 289-295 ◽  
Author(s):  
Nataliya Gulay ◽  
Yuriy Tyvanchuk ◽  
Marek Daszkiewicz ◽  
Bohdan Stel’makhovych ◽  
Yaroslav Kalychak
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Crystal Structures ◽  
Diffraction Data ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Arc Melting ◽  
Pure Metals

AbstractTwo compounds in the Sc-Co-In system were obtained by arc-melting of the pure metals and their crystal structures have been determined using single crystal X-ray diffraction data. The structure of Sc3Co1.64In4 (space group P6̅, а=7.6702(5), c=3.3595(2) Å, Z=1, R1=0.0160, wR2=0.0301) belongs to the Lu3Co2−xIn4 type structure, which is closely related to the ZrNiAl and Lu3CoGa5 types. The structure of Sc10Co9In20 (space group P4/nmm, а=12.8331(1), c=9.0226(1) Å, Z=2, R1=0.0203, wR2=0.0465) belongs to the Ho10Ni9In20 type, which is closely related to HfNiGa2.

scholarly journals Crystal structure of salts luminol with Li, Na and K

2014 ◽  
Vol 70 (a1) ◽  
pp. C1021-C1021
Author(s):  
Victor Rybakov ◽  
Vladimir Chernyshev ◽  
Ksenia Paseshnichenko ◽  
Victor Sheludyakov
Keyword(s):  
Crystal Structures ◽  
New Drugs ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Monoclinic System ◽  
Orthorhombic System ◽  
X Ray ◽  
Anti Oxidant ◽  
Molecular And Crystal Structures ◽  
Dsc Method

The molecular and crystal structures of new drugs Tamerit® (A) and Galavit® (B) which possess high effective immunomodulator, anti-inflammatory and anti-oxidant properties, were studied by single crystal and powder X-ray diffraction methods. As shown, A and B are aminodihydrophtalazindion (luminol) sodium salts, but A - is a dihydrate form and B anhydrous one, moreover it is a mixture two different crystal phases B1 and B2. The phase transition B1 <---> B2 is not registered by DSC method [1]. Crystal data for A: monoclinic system with a = 8.3429(4), b = 22.0562(11), c =5.2825(2) Å, β = 99.893(3)o, V = 957.59(8) Å3, Z = 4, sp.gr. R21/s. Crystal data for B1: monoclinic system with a = 14.7157(18), b = 3.7029(19), c = 16.0233(15) Å, β = 116.682(13)o, V = 780.1(4) Å3, Z = 4, sp.gr. R21/s. Crystal data for B2: orthorhombic system with a = 27.7765(15), b = 3.3980(19), c = 8.1692(19) Å, V = 771.0(5) Å3, Z = 4, sp.gr. Pna21. As a continuation of this work, we studied by the same methods other luminol salts: with Li - monohydrate (C1) and anhydrous (C2) and with K - trihydrate (D1) and anhydrous (D2). Crystal data for C1: monoclinic system with a = 13.0311(15), b = 9.6002(7), c = 7.3227(7) Å, β = 101.320(9)o, V = 898.26(15) Å3, Z = 4, sp.gr. R21/s. Crystal data for C2: monoclinic system with a = 13.0979(14), b = 8.7537(12), c = 14.5358(17) Å, β = 107.061(16)o, V = 1593.3(4) Å3, Z = 8, sp.gr. C2/c. Crystal data for D1: monoclinic system with a = 10.6760(6), b = 14.2905(8), c = 7.4902(5) Å, β = 99.246(5)o, V = 1127.90(12) Å3, Z = 4, sp.gr. R21/s. Crystal data for D2: orthorhombic system with a = 27.3961(19), b = 3.6811(14), c = 8.6672(12) Å, V = 874.1(4) Å3, Z = 4, sp.gr. Pna21 [2]. All X-ray experiments were made at T = 295 K. The features of molecular and crystal structures are discussed.

Research on Preparation of Nanocomposite Antibacterial Agent

2012 ◽  
Vol 535-537 ◽  
pp. 398-401
Author(s):  
Yang Zheng ◽  
Jian Fei Zhang
Keyword(s):  
Fourier Transform ◽  
Surface Modification ◽  
Antibacterial Agent ◽  
Anionic Surfactants ◽  
Hydrothermal Reaction ◽  
Alkali Concentration ◽  
Reaction Function ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
X Ray

The chitosan/modified nano-TiO2composited antibacterial was prepared by hydrothermal method in this paper. The effects of reaction time and temperature, different kinds of alkali concentration on the reaction function of chitosan and nano-TiO2were studied. Anionic surfactants were used for surface modification of nano-TiO2and the composite reaction conditions of chitosan/modified nano-TiO2were studied preliminarily. The chitosan/modified nano-TiO2composite antibacterial was characterized by Fourier transform infrared spectroscopy (FTIR). The results showed that: under the conditions of the hydrothermal reaction (2mol/L NaOH, 120°C, 8h), the hydrogen bonds were formed between nano-TiO2modified by SDBS and the chitosan molecules The different reaction conditions of nano-TiO2were characterized by X-ray diffraction (XRD). The results showed that: nano-TiO2can be fairly good activated under the conditions of the hydrothermal reaction: 1mol/L NaOH, 120°C, 14h.

scholarly journals A comparative study of the crystal structures of 2-(4-(2-(4-(3-chlorophenyl)pipera -zinyl)ethyl) benzyl)isoindoline-1,3-dione by synchrotron radiation X-ray powder diffraction and single-crystal X-ray diffraction

2019 ◽  
Vol 17 (1) ◽  
pp. 1116-1123
Author(s):  
Jin-Hui Zhou ◽  
Mao-Jian Shi ◽  
Lin Ding ◽  
Guo-Qiang ShangGuan ◽  
Jun Xu
Keyword(s):  
Synchrotron Radiation ◽  
Single Crystal ◽  
Cell Volume ◽  
Crystal Structures ◽  
Powder Diffraction ◽  
Title Compound ◽  
Unit Cell Volume ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
X Ray

AbstractThe crystal structures of the title compound, C27H26ClN3O2, were established by single-crystal X-ray diffraction and synchrotron radiation X-ray powder diffraction. The simulated annealing approach and rigid-body Rietveld refinement were applied to the structure solution from powder data. Direct methods and full-matrix least-squares techniques were used to solve and refine the crystal structure from single-crystal data. The title compound crystallized in space group P $\bar{1}$ with lattice parameters a=17.396(7) Å, b= 10.010(4) Å, c=6.833(3) Å, α=77.345(12) °, β= 93.534(6) °, γ=97.210(9) °, unit-cell volume V= 1151.0(2) Å3, Z=2 from powder data, and in space group P $\bar{1}$with lattice parameters α=82.485(2) °, β= 86.5110(10) °, γ=77.518(2) °, a=6.8159(6) Å, b= 10.0003(9) Å, c=17.4140(15) Å, unit-cell volume V =1148.3(2) Å3, Z=2 from single-crystal data. No detectable impurities were observed.

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