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Studies of 6Li-NMR properties in different salt solutions in low magnetic fields.

MPG-Autoren
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Glöggler,  S.
Research Group of NMR Signal Enhancement, MPI for Biophysical Chemistry, Max Planck Society;

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Zitation

Gordji-Nejad, A., Colell, J., Glöggler, S., Blümich, B., & Appelt, S. (2014). Studies of 6Li-NMR properties in different salt solutions in low magnetic fields. Journal of Magnetic Resonance, 214, 10-14. doi:10.1016/j.jmr.2011.09.040.


Zitierlink: https://hdl.handle.net/21.11116/0000-0000-2EA2-6
Zusammenfassung
In this article we report the longitudinal relaxation times (T1) of various 6Li salts (6LiI, 6LiCl and 6LiNO3) in D2O and H2O, measured in low magnetic fields (B0 = 3.5 mT). This investigation serves the purpose of clarifying the relaxation behavior of different 6Li solutions and different concentrations. The measurement were undertaken to establish a framework for future applications of hyperpolarized 6Li in medical imaging, biological studies and investigations of lithium ion batteries. Time will pass during the transport of hyperpolarized lithium ions to the sample, which leads to a polarization loss. In order to store polarization as long as possible, it is necessary to examine which 6Li salt solution has the longest relaxation time T1. Longitudinal relaxation times of 6Li salts in D2O and H2O were investigated as a function of concentration and the most extended T1 was found for 6LiI in D2O and H2O. In agreement with the theory the relaxation time T1 of all 6Li salts increase with decreasing concentration. In the case of 6LiI in H2O an inverse behavior was observed. We assume that the prolonged T1 times occur due to formation of 6LiOH upon the solution of 6LiI in H2O, which settles as a precipitate. By diluting the solution, the precipitate continuously dissolves and approaches T1 of 6LiOH (T1 ∼ 28 s), leading to a shorter T1 relaxation time.