Influence of the Nature of the Ligands on the Electronic Ground State of Organouranium(V) Compounds, Studied by Electron Paramagnetic Resonance

1997 ◽  
Vol 36 (25) ◽  
pp. 5931-5936 ◽  
Author(s):  
Didier Gourier ◽  
Daniel Caurant ◽  
Jean Claude Berthet ◽  
Christophe Boisson ◽  
Michel Ephritikhine
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Ground State ◽  
Electronic Ground State ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic ◽  
Electronic Ground

Quand la résonance paramagnétique électronique de l'uranium(IV) est-elle observable?

1980 ◽  
Vol 58 (22) ◽  
pp. 2377-2379 ◽  
Author(s):  
Edgar Soulié ◽  
Gérard Folcher ◽  
Basil Kanellakopulos
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Magnetic Susceptibility ◽  
Ground State ◽  
Excited Level ◽  
Electronic Ground State ◽  
Epr Spectra ◽  
Paramagnetic Resonance ◽  
X Band ◽  
Electron Paramagnetic ◽  
Electronic Ground

For non-Kramers ions, the electronic ground state may be nondegenerate. Then, if the first electronic excited level lies more than 0.3 cm−1 above the ground state, no electron paramagnetic resonance can occur between them in the X band. This is the case whenever a temperature-independent paramagnetism is observed in the magnetic susceptibility of the powder. An example of this situation, conflicting with published epr spectra, is provided by U(cupferron)4.

The electron paramagnetic resonance of methylene

1984 ◽  
Vol 62 (12) ◽  
pp. 1724-1730 ◽  
Author(s):  
R. A. Bernheim
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Bond Angle ◽  
Structural Information ◽  
Zero Field ◽  
Paramagnetic Resonance ◽  
Structure Splitting ◽  
Parameters Measurement ◽  
Laser Magnetic Resonance ◽  
Electron Paramagnetic ◽  
Electronic Ground

The electron paramagnetic resonance studies of methylene arc reviewed. The structural information that resulted include verification of the triplet multiplicity of the electronic ground state, the discovery of a bent geometry for the molecule with a bond angle of 134°, measurement of the zero-field or fine-structure splitting parameters, measurement of the g-factor tensor, and measurement of the isotropic and anisotropic 13C hyperfine interaction. The results are compared with recent measurements obtained with laser magnetic resonance techniques and theoretical treatments.

scholarly journals Distinguishing electron paramagnetic resonance signature of molecular hydrino

2021 ◽  
Author(s):  
Wilfred Hagen ◽  
Randell Mills
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Quantum Mechanics ◽  
Ground State ◽  
Experimental Testing ◽  
Power Level ◽  
Green Energy ◽  
Average Error ◽  
Paramagnetic Resonance ◽  
Continuous Power ◽  
Electron Paramagnetic

Abstract Quantum mechanics postulates that the hydrogen atom has a stable ground state from which it can be promoted to excited states by capture of electromagnetic radiation, with the energy of all possible states given by En = -13.598/n2 eV, in which n ≥ 1 is a positive integer. By contrast, it has been proposed that the n = 1 state is not the true ground state, and that so-called ‘hydrino’ states of lower energy can exist, which are characterized by fractional quantum numbers n = 1/p, in which 1 < p ≤ 137 is a limited integer1,2. Electron transition to a hydrino state, H(1/p) is non-radiative and requires a quantized amount of energy, 2mE1 (m is an integer), to be transferred to a catalyst3,4. Since its inception5 the hydrino hypothesis has remained highly controversial6-17 and laboratory verification studies by its proponents have been criticised18,19. Remarkably, no experimental testing by independent researchers has been described in the literature over the past 31 years. Here, we give an account of an independent electron paramagnetic resonance (EPR) study of molecular hydrino H2(1/4) that was produced by a plasma reaction of atomic hydrogen with non-hydrogen bonded water as the catalyst. A sharp, complex, multi-line EPR spectrum is found, whose detailed properties prove to be semi-quantitatively consistent with predictions20 from hydrino theory with an average error less than 0.09 G (0.2%) over a 39 G span of 37 lines. We have sought but failed to find reasonable alternative, ‘conventional’ interpretations for the detected paramagnetism. Fundamental relevance of the hydrino hypothesis lies in its challenging some of the foundations of the theory of quantum mechanics1. Very high net energy release during hydrino formation signifies technological relevance as a novel method of green energy production with recent validation at the 100 kW continuous power level by measurement of steam production20-27.

scholarly journals Broadband electron paramagnetic resonance of a molecular spin triangle

2021 ◽  
Vol 23 (36) ◽  
pp. 20268-20274
Author(s):  
Jérôme Robert ◽  
Philippe Turek ◽  
Matthieu Bailleul ◽  
Athanassios K. Boudalis
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Ground State ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Sweep ◽  
Paramagnetic Resonance ◽  
Field Splitting ◽  
Molecular Spin ◽  
Electron Paramagnetic

A new broadband EPR spectrometer capable of measuring in frequency- and field-sweep modes is described and its functionality is demonstrated on a ferromagnetic Cu3II triangle demonstrating a moderate zero-field splitting of its quartet ground state.

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