Simple device for dissolution and sample transfer for applications in spin-hyperpolarization

Dietrich, Corinna; Wissel, Julia; Knoche, Jannik; Lorenz, Oliver; Matysik, Jörg

doi:10.1080/00268976.2018.1550224

Cited by 4 publications

(10 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Long-lived spin operators in rapidly rotating methyl groups are of great practical relevance, due to their connection to quantum rotor induced polarisation (QRIP) effects, for example [31][32][33][34][35][36][37]52,54,79,80 . Extensive discussions of long-lived spin operators in rotating methyl groups have been given in references 52-54.…”

Section: B Methyl Rotormentioning

confidence: 99%

Centralizer theory for long-lived spin states

Bengs

2021

The Journal of Chemical Physics

View full text Add to dashboard Cite

Nuclear long-lived spin states represent spin density operator configurations that are exceptionally well protected against spin relaxation phenomena. Their long-lived character is exploited in a variety of Nuclear Magnetic Resonance (NMR) techniques. Despite growing importance of long-lived spin states in modern NMR strategies for their identification have changed little over the last decade. The standard approach heavily relies on a chain of group theoretical arguments. In this paper we present a more streamlined method for the calculation of such configurations. Instead of focusing on the symmetry properties of the relaxation superoperator, we focus on its corresponding relaxation algebra. This enables us to analyse long-lived spin states with Lie algebraic methods rather than group theoretical arguments. We show that the centralizer of the relaxation algebra forms a basis for the set of long-lived spin states. The characterisation of the centralizer on the other hand does not rely on any special symmetry arguments and its calculation is straightforward. We outline a basic algorithm and illustrate advantages by considering long-lived spin states for some spin-1/2 pairs and rapidly rotating methyl groups.

show abstract

Section: B Methyl Rotormentioning

confidence: 99%

Centralizer theory for long-lived spin states

Bengs

2021

The Journal of Chemical Physics

View full text Add to dashboard Cite

show abstract

“…The mixture was transferred to the magnet and measured immediately. This procedure was carried out manually or with the self-built transfer system where the mixing and the transfer of the solution into the magnet is carried out in one step during 35 s (Dietrich et al, 2018). If suitable, the transfer system has been preferred, due to faster sample transfer into the magnet.…”

Section: Liquid-state Nmrmentioning

confidence: 99%

“…(S/N)QRIP is the signal to noise ratio of the QRIP-enhanced signal and (S/N)ref is the signal to noise ratio of the reference spectrum with multiple scans. The number of scans is given as nref (Dietrich et al, 2018). S/N ratios were obtained from the Topspin 3.1 software.…”

Section: Signal Enhancement Factormentioning

confidence: 99%

“…It is also possible to access the signal enhancement in liquid state, by freezing 1 at helium temperature and then rapidly dissolving it in deuterated solvents at room temperature and measuring it immediately (Icker and Berger, 2012). With a custom-made setup, we were able to improve the safety and speed of the dissolution and transfer process, resulting in a higher signal enhancement factor of 530 (Dietrich et al, 2018). An example of a QRIP enhanced spectrum is given in Figure 2.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The relation between crystal structure and the occurrence of quantum-rotor induced polarization

Dietrich¹,

Wissel²,

Lorenz³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Abstract. Among hyperpolarization techniques, quantum-rotor induced polarization (QRIP), also known as Haupt effect, is a peculiar one. It is on one hand rather simple to apply by cooling and heating of a sample. On the other hand, only the methyl groups of a few substances seem to allow for the effect, which strongly limits the applicability of QRIP. While it is known, that a high tunnel frequency is favorable, the structural requirements for the effect to occur are not exhaustively studied yet. Here we report on our efforts to heuristically recognize structural motifs in molecular crystals able to allow to produce QRIP.

show abstract

“…With a custom-made setup, we were able to improve the safety and speed of the dissolution and transfer process, result-Published by Copernicus Publications on behalf of the Groupement AMPERE. ing in a higher signal enhancement factor of 530 (Dietrich et al, 2019). An example of a QRIP-enhanced spectrum is given in Fig.…”

Section: Introductionmentioning

confidence: 99%

The relation between crystal structure and the occurrence of quantum-rotor-induced polarization

et al. 2021

Self Cite

View full text Add to dashboard Cite

Abstract. Among hyperpolarization techniques, quantum-rotor-induced polarization (QRIP), also known as the Haupt effect, is a peculiar one. It is, on the one hand, rather simple to apply by cooling and heating a sample. On the other hand, only the methyl groups of a few substances seem to allow for the effect, which strongly limits the applicability of QRIP. While it is known that a high tunnel frequency is required, the structural conditions for the effect to occur have not been exhaustively studied yet. Here we report on our efforts to heuristically recognize structural motifs in molecular crystals able to allow to produce QRIP.

show abstract

Simple device for dissolution and sample transfer for applications in spin-hyperpolarization

Cited by 4 publications

References 27 publications

Centralizer theory for long-lived spin states

Centralizer theory for long-lived spin states

The relation between crystal structure and the occurrence of quantum-rotor induced polarization

The relation between crystal structure and the occurrence of quantum-rotor-induced polarization

Contact Info

Product

Resources

About