scholarly journals Long-lived nuclear spin states in monodeuterated methyl groups

2016 ◽  
Vol 18 (27) ◽  
pp. 17965-17972 ◽  
Author(s):  
Stuart J. Elliott ◽  
Lynda J. Brown ◽  
Jean-Nicolas Dumez ◽  
Malcolm H. Levitt
Keyword(s):  
Chemical Shift ◽  
Nuclear Spin ◽  
Methyl Groups ◽  
Spin States ◽  
Chemical Shift Difference ◽  
Significant Chemical

It is possible to access long-lived nuclear singlet order in monodeuterated methyl groups, in the case that a significant chemical shift difference exists between the CH2D protons.

scholarly journals An Examination of Factors Influencing Small Proton Chemical Shift Differences in Nitrogen-Substituted Monodeuterated Methyl Groups

Symmetry ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1610
Author(s):  
Stuart Elliott ◽  
O. Ogba ◽  
Lynda Brown ◽  
Daniel O’Leary
Keyword(s):  
Chemical Shift ◽  
Local Environment ◽  
Computational Approach ◽  
Methyl Groups ◽  
Proton Chemical Shift ◽  
Isotropic Chemical Shift ◽  
Spin States ◽  
Chemical Shift Difference ◽  
Factors Influencing ◽  
Different Populations

Monodeuterated methyl groups have previously been demonstrated to provide access to long-lived nuclear spin states. This is possible when the CH2D rotamers have sufficiently different populations and the local environment is chiral, which foments a non-negligible isotropic chemical shift difference between the two CH2D protons. In this article, the focus is on the N-CH2D group of N-CH2D-2-methylpiperidine and other suitable CH2D-piperidine derivatives. We used a combined experimental and computational approach to investigate how rotameric symmetry breaking leads to a 1H CH2D chemical shift difference that can subsequently be tuned by a variety of factors such as temperature, acidity and 2-substituted molecular groups.

Theory of long-lived nuclear spin states in methyl groups and quantum-rotor induced polarisation

2015 ◽  
Vol 142 (4) ◽  
pp. 044506 ◽  
Author(s):  
Jean-Nicolas Dumez ◽  
Pär Håkansson ◽  
Salvatore Mamone ◽  
Benno Meier ◽  
Gabriele Stevanato ◽  
...  
Keyword(s):  
Nuclear Spin ◽  
Methyl Groups ◽  
Spin States ◽  
Induced Polarisation

scholarly journals Dynamic Nuclear Polarization of Long-Lived Nuclear Spin States in Methyl Groups

2017 ◽  
Vol 8 (15) ◽  
pp. 3549-3555 ◽  
Author(s):  
Jean-Nicolas Dumez ◽  
Basile Vuichoud ◽  
Daniele Mammoli ◽  
Aurélien Bornet ◽  
Arthur C. Pinon ◽  
...  
Keyword(s):  
Dynamic Nuclear Polarization ◽  
Nuclear Spin ◽  
Nuclear Polarization ◽  
Methyl Groups ◽  
Spin States

Long-Lived Nuclear Spin States in Methyl Groups and Quantum-Rotor-Induced Polarization

2013 ◽  
Vol 135 (50) ◽  
pp. 18746-18749 ◽  
Author(s):  
Benno Meier ◽  
Jean-Nicolas Dumez ◽  
Gabriele Stevanato ◽  
Joseph T. Hill-Cousins ◽  
Soumya Singha Roy ◽  
...  
Keyword(s):  
Nuclear Spin ◽  
Induced Polarization ◽  
Methyl Groups ◽  
Spin States

scholarly journals Hyperpolarized long-lived nuclear spin states in monodeuterated methyl groups

2018 ◽  
Vol 20 (15) ◽  
pp. 9755-9759 ◽  
Author(s):  
Stuart J. Elliott ◽  
Benno Meier ◽  
Basile Vuichoud ◽  
Gabriele Stevanato ◽  
Lynda J. Brown ◽  
...  
Keyword(s):  
Dynamic Nuclear Polarization ◽  
Nuclear Spin ◽  
Nuclear Polarization ◽  
Methyl Groups ◽  
Spin States ◽  
Dissolution Dynamic Nuclear Polarization

Dissolution-dynamic nuclear polarization is implemented to hyperpolarize long-lived nuclear spin states in monodeuterated methyl groups.

Initializing 214 Pure 14-Qubit Entangled Nuclear Spin States in a Hyperpolarized Molecular Solid

2021 ◽  
pp. 3647-3654
Author(s):  
Gerd Kothe ◽  
Michail Lukaschek ◽  
Tomoaki Yago ◽  
Gerhard Link ◽  
Konstantin L. Ivanov ◽  
...  
Keyword(s):  
Nuclear Spin ◽  
Spin States ◽  
Molecular Solid

Circular dichroism spectra of tetraamminecobalt(III) complexes of amino alcohols

1978 ◽  
Vol 31 (11) ◽  
pp. 2399 ◽  
Author(s):  
CJ Hawkins ◽  
GA Lawrance ◽  
JA Palmer
Keyword(s):  
Circular Dichroism ◽  
Chemical Shift ◽  
Chemical Shifts ◽  
Amino Alcohols ◽  
Circular Dichroism Spectra ◽  
Chemical Shift Difference ◽  
Solvent Dependence ◽  
Cotton Effects ◽  
Circular Dichroïsm ◽  
Chiral Amino Alcohols

The circular dichroism spectra are reported for tetraamminecobalt(III) complexes with the chiral amino alcohols 2-aminopropan-1-ol, 2- aminobutan-1-ol, 1-aminopropan-2-ol, 2-amino-1-phenyl-ethanol, ψ- ephedrine and ephedrine with the alcohol groups protonated (OH) and deprotonated (O-). The solvent dependence of the chemical shifts of the NH protons was investigated to determine the effects of stereoselective solvation on the circular dichroism, but, in contrast to some other related systems, the chemical shift difference between the two NH2 protons was relatively insensitive to solvent. Consistent with this, the circular dichroism spectra of the tetraphenylborate salts of the deprotonated complexes were found not to be markedly dependent on solvent. Tetraammine-{(-)-ψ-ephedrine)cobalt(III) and tetraammine{(-)- ephedrine}cobalt(III) were found to have the same signs of Cotton effects for the various d-d transitions, whereas bis{(-)-ψ- ephedrine}copper(II) and bis{(-)-ephedrine}copper(II) had opposite signs. This has been explained in terms of different conformer populations in the cobalt(III) and copper(II) systems.

Sign in / Sign up

Export Citation Format

Share Document