Chemical Effects on Nuclear Induction Signals from Organic Compounds

Arnold, James T.; Dharmatti, S. S.; Packard, M. E.

doi:10.1063/1.1748264

Cited by 207 publications

(69 citation statements)

References 6 publications

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“…The predicted 6 resolution of the chemically nonequivalent sites of identical nuclei in a molecule, akin to the high-resolution conventional nuclear magnetic resonance spectrum of ethanol of 1951, 22 has not yet been experimentally observed in nuclear magneto-optic spectroscopy (NMOS). The antisymmetric polarizability underlying NSOR increases rapidly as the incident light frequency approaches optical excitations, [23][24][25] which has been proposed to facilitate a means of gaining chemical resolution of the nuclear magneto-optic rotation signals arising from the different chromophores of the molecule.…”

Section: Introductionmentioning

confidence: 99%

Nuclear spin circular dichroism

Vaara¹,

Rizzo²,

Kauczor³

et al. 2014

The Journal of Chemical Physics

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Articles you may be interested inMagnetic circular dichroism of symmetry and spin forbidden transitions of high-spin metal ions J. Chem. Phys. 113, 5003 (2000) Recent years have witnessed a growing interest in magneto-optic spectroscopy techniques that use nuclear magnetization as the source of the magnetic field. Here we present a formulation of magnetic circular dichroism (CD) due to magnetically polarized nuclei, nuclear spin-induced CD (NSCD), in molecules. The NSCD ellipticity and nuclear spin-induced optical rotation (NSOR) angle correspond to the real and imaginary parts, respectively, of (complex) quadratic response functions involving the dynamic second-order interaction of the electron system with the linearly polarized light beam, as well as the static magnetic hyperfine interaction. Using the complex polarization propagator framework, NSCD and NSOR signals are obtained at frequencies in the vicinity of optical excitations. Hartree-Fock and density-functional theory calculations on relatively small model systems, ethene, benzene, and 1,4-benzoquinone, demonstrate the feasibility of the method for obtaining relatively strong nuclear spin-induced ellipticity and optical rotation signals. Comparison of the proton and carbon-13 signals of ethanol reveals that these resonant phenomena facilitate chemical resolution between non-equivalent nuclei in magneto-optic spectra. © 2014 AIP Publishing LLC.

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Section: Introductionmentioning

confidence: 99%

Nuclear spin circular dichroism

Vaara¹,

Rizzo²,

Kauczor³

et al. 2014

The Journal of Chemical Physics

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“…The first 1 H NMR spectra of H 2 O were obtained in 1946 (Bloch et al 1946). The first 1 H NMR spectra of ethanol C 2 H 5 OH were developed in 1951 (Arnold et al 1951). At the first glance, it may seem that these are fairly simple organic molecules, at the same time NMR spectroscopy exhibits grate variety (Nose et al, 2005;Richards, Hollerton, 2011;Roberts, 2002;Hu et al, 2010) in such characteristics as chemical shift, spin-spin interactions and the effect of chemical exchange.…”

Section: Introductionmentioning

confidence: 99%

1H NMR Analysis of the Aqueous-Alcoholic Mixtures, Prepared in Demineralized by Reverse Osmosis Water

Kuzmin¹,

Topolnik²,

Fatiukha³

et al. 2014

Adv. Sci.

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Abstract:The aim of the publication is to study the mechanisms of transformation of ethanol protons (ethyl rectified spirit -ERS) and water (demineralized by reverse osmosis) in the process of creating aqueousalcoholic mixtures (AAM). The methods used in the work: 1 H nuclear magnetic resonance (NMR) spectroscopy of AAM; methods of evaluation of physicochemical and organoleptic characteristics of water, ethanol, AAM. In this paper, we have established fundamentally new features in the process of creating AAM that are directly dependent on the time of contact with demineralized water and ERS. We have experimentally established the dependence rate of achievement of thermodynamic equilibrium and its character, as well as obtaining optimal organoleptic characteristics of AAM prepared with demineralized water and ERS.

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“…The sensitivity of the nucleus to its electronic environment in a molecule (the "chemical shift") and spinspin interactions were seen at first in the nuclear physics community as annoying features, but the potential of NMR spectroscopy for analytical studies was soon revealed by the discovery of the 3 peaks of ethanol in Purcell's group [8]. Almost none of the early applications of NMR were medical, although a large amount of work was published on relaxation, diffusion, and exchange of water in cells and tissues, even in living human subjects [10] and whole animals [11].…”

Section: Historical Introductionmentioning

confidence: 99%

Magnetic Resonance Imaging: From Spin Physics to Medical Diagnosis

Nacher

2009

The Spin

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Abstract. Two rather similar historical evolutions are evoked, each one originating in fundamental spin studies by physicists, and ending as magnetic resonance imaging (MRI), a set of invaluable tools for clinical diagnosis in the hands of medical doctors. The first one starts with the early work on nuclear magnetic resonance, the founding stone of the usual proton-based MRI, of which the basic principles are described. The second one starts with the optical pumping developments made to study the effects of spin polarization in various fundamental problems. Its unexpected outcome is a unique imaging modality, also based on MRI, for the study of lung physiology and pathologies.

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Chemical Effects on Nuclear Induction Signals from Organic Compounds

Cited by 207 publications

References 6 publications

Nuclear spin circular dichroism

Nuclear spin circular dichroism

1H NMR Analysis of the Aqueous-Alcoholic Mixtures, Prepared in Demineralized by Reverse Osmosis Water

Magnetic Resonance Imaging: From Spin Physics to Medical Diagnosis

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