Observation of MnP magnetic clusters in room-temperature ferromagnetic semiconductor Zn1−xMnxGeP2 using nuclear magnetic resonance

2003 ◽  
Vol 83 (9) ◽  
pp. 1809-1811 ◽  
Author(s):  
Taesoon Hwang ◽  
Jeong Hyun Shim ◽  
Soonchil Lee
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Room Temperature ◽  
Ferromagnetic Semiconductor ◽  
Magnetic Clusters ◽  
Nuclear Magnetic

ChemInform Abstract: Quantum Discord in Nuclear Magnetic Resonance Systems at Room Temperature

ChemInform ◽  
2013 ◽  
Vol 44 (9) ◽  
pp. no-no
Author(s):  
J. Maziero ◽  
R. Auccaise ◽  
L. C. Celeri ◽  
D. O. Soares-Pinto ◽  
E. R. deAzevedo ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Quantum Discord ◽  
Room Temperature ◽  
Nuclear Magnetic

scholarly journals The Chemical Shift of the 29Si Nuclear Magnetic Resonance in a Synthetic Single Crystal of Mg2SiO4

1985 ◽  
Vol 40 (2) ◽  
pp. 126-130 ◽  
Author(s):  
N. Weiden ◽  
H. Rager
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Chemical Shift ◽  
Single Crystal ◽  
Angular Dependence ◽  
Room Temperature ◽  
Bond Distance ◽  
Chemical Shift Tensor ◽  
The Individual ◽  
Nuclear Magnetic

The angular dependence of the chemical shift of the 29Si nuclear magnetic resonance has been measured in a synthetic single crystal of Mg2SiO4 (space group Pbnm, Z = 4). The measurements were performed at room temperature at a frequency of 39.758 MHz using the FT-NMR technique. The eigenvalues of the shift tensor with respect to 29Si in TMS are δx = - 38.8 ppm, δv = -55.3 ppm and δz = - 95.4 ppm, with the eigenvector y parallel to c and the eigenvector z forming an angle of 7.5° with a. The results show clearly the influence of the individual S i - O bonds on the chemical shift tensor. The chemical shift along the S i -O bond depends in good approximation exponentially on the S i - O bond distance.

Mobility of Phosphorescent Solutes in Polymethylmethacrylate

1971 ◽  
Vol 49 (3) ◽  
pp. 515-519 ◽  
Author(s):  
R. J. Woods ◽  
J. F. Manville
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Methyl Methacrylate ◽  
Room Temperature ◽  
Polymer Solutions ◽  
Significant Proportion ◽  
Nuclear Magnetic

Nuclear magnetic resonance measurements upon polymerizing methyl methacrylate solutions show that a significant proportion of the solute molecules (naphthalene, phenanthrene) remain untrapped when the material becomes solid (60–30% residual unsaturation), complete rigid trapping of the solute occurring only as the unsaturation present is reduced to near zero.Phosphorescence measurements show increasing phosphorescence from solid polymethylmethacrylate containing phenanthrene as the residual unsaturation in the polymer is reduced from about 4% to zero, which is attributed to the gradual immobilization of an increasing fraction of the solute molecules as the unsaturation is reduced. Methyl isobutyrate reduces the phosphorescence from solutions of phenanthrene in polymethylmethacrylate at room temperature, but polymer solutions containing methyl isobutyrate and those containing residual unsaturation phosphoresce strongly at 77 °K.

scholarly journals Структурная эволюция молекулярного сегнетоэлектрика хлорида диизопропиламмония (DIPAC)

2020 ◽  
Vol 62 (7) ◽  
pp. 1055
Author(s):  
Н.И. Ускова ◽  
Е.В. Чарная ◽  
Д.Ю. Подорожкин ◽  
C.B. Барышников ◽  
И.В. Егорова ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Thermal Treatment ◽  
Room Temperature ◽  
Orthorhombic Structure ◽  
X Ray ◽  
Nuclear Magnetic

Changes in structure of a new molecular ferroelectric diisopropylammonium chloride (C6H16ClN, DIPAC) at room temperature were studied by high-resolution (CP-MAS) nuclear magnetic resonance (NMR) and X-ray analysis. NMR measurements were carried out for ^{13}С nuclei. Monoclinic ferroelectric and orthorhombic nonpolar phases as well as their coexistence were observed depending on time and thermal treatment. It was shown that the polar modification of DIPAC at room temperature transforms with time to the nonpolar orthorhombic structure. N. I. Uskova, E. V. Charnaya, L. Yu. Podorozhkin, S. V. Baryshnikov, I. V. Egorova, A. Yu. Milinskii

Titanium tetrachloride promoted conversion of carboxylic acids to carboxamides

1970 ◽  
Vol 48 (6) ◽  
pp. 983-986 ◽  
Author(s):  
James D. Wilson ◽  
Harold Weingarten
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Carboxylic Acids ◽  
Atmospheric Pressure ◽  
Room Temperature ◽  
Titanium Tetrachloride ◽  
Nuclear Magnetic Resonance Spectra ◽  
Derivatives Of ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

In the presence of approximately stoichiometric amounts of TiCl4, carboxylic acids and amines react at room temperature and atmospheric pressure to form carboxamides in good yields. The mono- and diformyl derivatives of 1,2-dimethylhydrazine exhibit unusual nuclear magnetic resonance spectra which are briefly discussed.

Reductions with sulfurated borohydrides. I. Preparation of sulfurated borohydrides

1968 ◽  
Vol 46 (16) ◽  
pp. 2754-2757 ◽  
Author(s):  
J. M. Lalancette ◽  
A. Frêche ◽  
R. Monteux
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Thermal Decomposition ◽  
Magnetic Resonance ◽  
Organic Solvents ◽  
Sodium Borohydride ◽  
Room Temperature ◽  
Preparative Method ◽  
Elementary Analysis ◽  
Nuclear Magnetic

Sodium borohydride reacts with sulfur at room temperature in the presence of appropriate organic solvents to give a sulfurated borohydride: NaBH2S3. The formulation of this hydride has been established by infrared, nuclear magnetic resonance, and elementary analysis. Thermal decomposition and hydrolysis are reported. The reaction observed with NaBH4 appears to be general between borohydrides and the lower elements of Group VIA: Se and Te. A facile preparative method of NaBH2S3 is presented.

Complex formation between cuprous iodide and phenyl phosphine: a nuclear magnetic resonance and X-ray crystallographic study

1985 ◽  
Vol 63 (4) ◽  
pp. 928-934 ◽  
Author(s):  
Raymond J. Batchelor ◽  
Thomas Birchall ◽  
Romolo Faggiani
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Room Temperature ◽  
Monoclinic Space Group ◽  
X Ray ◽  
Magnetic Resonance Data ◽  
Crystallographic Study ◽  
Rapid Exchange ◽  
Resonance Data ◽  
Nuclear Magnetic

The X-ray crystal structure of di-μ-iodobis[bis(phenylphosphine)copper(I)] has been determined: R1 = 0.0460. The crystals were monoclinic, space group Cc, a = 10.625(2) Å, b = 25.115(8) Å, c = 11.361(2) Å, β = 105.929(15)°, fw = 821.28, and Z = 4. The molecular structure consists of two CuI(C6H5PH2)2 units bridged via the iodines so that each copper achieves tetrahedral coordination. Nuclear magnetic resonance data provides evidence that the phenylphosphines remain coordinated in solution but undergo rapid exchange at room temperature.

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