scholarly journals Pyroelectricity and field-induced spin-flop in (4-(Aminomethyl)pyridinium) 2 MnCl 4 · 2H 2 O

2020 ◽  
Vol 7 (5) ◽  
pp. 200271 ◽  
Author(s):  
Kaige Gao ◽  
Chunlin Liu ◽  
Wei Zhang ◽  
Kangni Wang ◽  
Wenlong Liu
Keyword(s):  
Crystal Structure ◽  
Symmetric Space ◽  
Single Crystals ◽  
Ferroelectric Properties ◽  
Ferroelectric Hysteresis Loop ◽  
Slow Evaporation ◽  
Temperature Dependent ◽  
Antiferromagnetic Ordering ◽  
Pyroelectric Current ◽  
Ferroelectric Hysteresis

Large single crystals of (4-(Aminomethyl)pyridinium) 2 MnCl 4 · 2H 2 O ( 1 ) were grown by slow evaporation of solution. The crystal structure was solved to be Pī, which belongs to the central symmetric space group. But small pyroelectric current was detected, as well as a ferroelectric hysteresis loop. The pyroelectric and the ferroelectric properties were attributed to the strain caused by defects. Temperature-dependent magnetic curves and the M – H curve show that 1 is antiferromagnetic ordering below 2.5 K. A field-induced spin-flop is observed in the antiferromagnetic ordering state.

scholarly journals Lamotrigine ethanol monosolvate

2018 ◽  
Vol 74 (5) ◽  
pp. 678-681 ◽  
Author(s):  
Charlie L. Hall ◽  
Jason Potticary ◽  
Hazel A. Sparkes ◽  
Natalie E. Pridmore ◽  
Simon R. Hall
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Psychiatric Disorders ◽  
Single Crystals ◽  
Active Pharmaceutical Ingredient ◽  
Saturated Solution ◽  
Anhydrous Ethanol ◽  
Slow Evaporation ◽  
Ethanol Molecule ◽  
Ethyl Group

Lamotrigine is an active pharmaceutical ingredient used as a treatment for epilepsy and psychiatric disorders. Single crystals of an ethanolate solvate, C9H7Cl2N5·C2H5OH, were produced by slow evaporation of a saturated solution from anhydrous ethanol. Within the crystal structure, the lamotrigine molecules form dimers through N—H...N hydrogen bonds involving the amine N atoms in the ortho position of the triazine group. These dimers are linked into a tape motif through hydrogen bonds involving the amine N atoms in the para position. The ethanol and lamotrigine are present in a 1:1 ratio in the lattice with the ethyl group of the ethanol molecule exhibiting disorder with an occupancy ratio of 0.516 (14):0.484 (14).

scholarly journals Synthesis and crystal structure of N,N′-bis(4-chlorophenyl)thiourea N,N-dimethylformamide

2021 ◽  
Vol 19 (1) ◽  
pp. 511-517
Author(s):  
Ayodele T. Odularu ◽  
Peter A. Ajibade ◽  
Opeoluwa O. Oyedeji ◽  
Johannes Z. Mbese ◽  
Horst Puschmann
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Mild Condition ◽  
Monoclinic Space Group ◽  
Slow Evaporation ◽  
Synthesis And Crystal Structure ◽  
Space Group ◽  
Cell Parameters

Abstract This study is about the synthesis of N,N′-bis(4-chlorophenyl)thiourea N,N-dimethylformamide (C16H17Cl2N3OS) compound. Single crystals of the compound were obtained by slow evaporation of N,N′-bis(4-chlorophenyl)thiourea (C13H10Cl2N2S) in N,N-dimethylformamide (C3H7NO; DMF) through recrystallization under mild condition. Important classical N–H⋯O links the two molecules together. Results revealed that C16H17Cl2N3OS crystallized in the monoclinic space group P21/c with the respective cell parameters of a = 92,360 (4) Å, b = 7.2232 (3) Å, 25.2555 (11) Å, β = 91.376 (3), α = γ = 90°, V = 1684.40 (12) Å3, T = 119.94 (13) K and Z = 4 and Z′ = 1.

Spectroscopic Investigations on New Organic NLO crystal – 2-amino-5-chloropyridinium-2,4-dinitrophenolate

2017 ◽  
Vol 232 (1) ◽  
Author(s):  
Pullithodi Mohamed Kutty ◽  
Joseph Chandrasekaran ◽  
Balraj Babu ◽  
Yoshitaka Matsushita
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Single Crystals ◽  
Room Temperature ◽  
Methanol Solution ◽  
Powder Xrd ◽  
Single Crystal Xrd ◽  
Slow Evaporation ◽  
Crystalline Phases ◽  
Evaporation Method

AbstractNew organic single crystals of 2-amino-5-chloropyridinium-2,4-dinitrophenolate were successfully grown by the slow evaporation method at room temperature from methanol solution. Crystal structure and crystalline phases were confirmed from the single crystal XRD and powder XRD, respectively.

Dielectric and Ferroelectric Properties of (Pb0.9Ba0.1) ZrO3 Ceramics

2011 ◽  
Vol 687 ◽  
pp. 247-250
Author(s):  
Jun Bo Wu ◽  
Xin Gui Tang ◽  
Qiu Xiang Liu ◽  
Yan Ping Jiang
Keyword(s):  
Phase Transition ◽  
Room Temperature ◽  
Ferroelectric Properties ◽  
Solid State Reaction Method ◽  
Ferroelectric Hysteresis Loop ◽  
Dielectric Measurements ◽  
Reaction Method ◽  
Maximum Value ◽  
Ferroelectric Hysteresis ◽  
Maximum Permittivity

(Pb1-xBax)ZrO3(PBZ) ceramics forx= 0.10 were synthesized by the mixed oxide solid state reaction method. Phase transition was investigated by dielectric measurements in the temperature range from 27 to 350 °C at various frequencies. The permittivity of the solids corresponding to (Pb1-xBax) ZrO3showed the maximum value of 10220 atx= 0.10 at the phase transition temperature. The maximum permittivity gradually increasing concentration up tox= 0.10. The ferroelectric hysteresis loop of the PBZ ceramics forx= 0.10 is displayed at room temperature and 0.2 Hz.

Crystal Structure and Thermal Behaviour of Er2(SeO4)3 · 8H2O

2004 ◽  
Vol 59 (9) ◽  
pp. 958-962 ◽  
Author(s):  
Ina Krügermann ◽  
Mathias S. Wickleder
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
Single Crystals ◽  
Thermal Behaviour ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Monoclinic Space Group ◽  
Powder Diffraction Data ◽  
Temperature Dependent ◽  
Selenic Acid

Single crystals of Er2(SeO4)3 ・ 8H2O were obtained by dissolving Er2O3 in selenic acid. The selenate crystallizes in the monoclinic space group C2/c (Z = 4, a = 1372.8(2), b = 687.51(7), c = 1860.2(3) pm, β = 101.85(2)◦, Rall = 0.0518) and contains the Er3+ ions in eightfold coordination of oxygen atoms that belong to two crystallographically different SeO42− ions and to four H2O molecules. According to DTA/TG measurements and temperature dependent powder diffraction data, Er2(SeO4)3 ・8H2O decomposes in several steps yielding finally Er2O3. Er2(SeO4)3 and Er2(SeO3)3 could be identified as intermediates, and for Er2(SeO4)3 a phase transition was detected.

PrBa2Cu3Ox Superconducting Powders

1998 ◽  
Vol 12 (29n31) ◽  
pp. 3254-3258 ◽  
Author(s):  
J. C. Cooley ◽  
W, L. Hults ◽  
E. J. Peterson ◽  
J. L. Smith
Keyword(s):  
Crystal Structure ◽  
Thin Films ◽  
Magnetic Properties ◽  
Sample Preparation ◽  
Single Crystals ◽  
Single Phase ◽  
Antiferromagnetic Ordering

We have been preparing polycrystalline PrBa2Cu3O x (PBCO) to look for superconductivity at 89 K as has been reported in single crystals and thin films. We have found two transitions one at ≈ 90 K and another one at ≈ 12 K in samples, which we are still unable to make single phase. Additional phases include PrBaO 3 and BaCuO 2. The PBCO samples all appear to have the usual YBCO crystal structure and this is the phase that we believe contains the ≈ 90 K transition. The ≈ 12 K transition is most likely antiferromagnetic ordering of the PrBaO 3 phase. We are continuing to investigate sample preparation. Here we present and discuss the superconducting and magnetic properties of our samples.

Effect of Mn3+ doping on crystal structure, point defects, and optical properties in green Ca3(VO4)2 single crystals

2021 ◽  
pp. 111300
Author(s):  
Galina M. Kuz’micheva ◽  
Liudmila. I. Ivleva ◽  
Irina A. Kaurova ◽  
Evgeny V. Khramov ◽  
Victor B. Rybakov ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Optical Properties ◽  
Single Crystals ◽  
Point Defects

scholarly journals Some Novel Cobalt Diphenylphosphine Complexes: Synthesis, Characterization, and Behavior in the Polymerization of 1,3-Butadiene

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 4067
Author(s):  
Giovanni Ricci ◽  
Giuseppe Leone ◽  
Giorgia Zanchin ◽  
Benedetta Palucci ◽  
Alessandra Forni ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
The Novel ◽  
X Ray Diffraction ◽  
X Ray ◽  
And Behavior

Some novel cobalt diphenylphosphine complexes were synthesized by reacting cobalt(II) chloride with (2-methoxyethyl)diphenylphosphine, (2-methoxyphenyl)diphenylphosphine, and 2-(1,1-dimethylpropyl)-6-(diphenylphosphino)pyridine. Single crystals suitable for X-ray diffraction studies were obtained for the first two complexes, and their crystal structure was determined. The novel compounds were then used in association with methylaluminoxane (MAO) for the polymerization of 1,3-butadiene, and their behavior was compared with that exhibited in the polymerization of the same monomer by the systems CoCl2(PnPrPh2)2/MAO and CoCl2(PPh3)2/MAO. Some significant differences were observed depending on the MAO/Co ratio used, and a plausible interpretation for such a different behavior is proposed.

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