Journal of the Korean Magnetic Resonance Society (한국자기공명학회논문지)

Korean Magnetic Resonance Society (한국자기공명학회)
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Role of NH4 and H2O in Tutton Salt (NH4)2M(SO4)2·6H2O (M=Fe and Zn) Single Crystals Studied by 1H and 14N NMR at High Temperatures

  • Park, Sung Soo (Analytical Laboratory of Advanced Ferroelectric Crystals, Jeonju University) ;
  • Lim, Ae Ran (Analytical Laboratory of Advanced Ferroelectric Crystals, Jeonju University)
  • Received : 2017.05.02
  • Accepted : 2017.05.29
  • Published : 2017.06.20
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Abstract

At high temperature, the roles of $NH_4$ and $H_2O$ in $(NH_4)_2Fe(SO_4)_2{\cdot}6H_2O$ and $(NH_4)_2Zn(SO_4)_2{\cdot}6H_2O$ single crystals were investigated using a pulse NMR spectrometer. Temperature was shown to have a significant influence, causing changes in the deformation of $NH_4$ and $H_2O$. From the $^1H$ NMR and $^{14}N$ NMR spectrum, the forms of environment surrounding $^{14}N$ in $NH_4$ groups is more important than the loss of $H_2O$ groups. NMR studies indicate that $NH_4{^+}$ ions in Tutton salts play an important role in the changes of the crystal structure at high temperatures.

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References

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