Research output: Contribution to journal › Article › peer-review
Proton mobility in Ruddlesden−Popper phase H2La2Ti3O10 studied by 1H NMR. / Shelyapina, Marina; Nefedov, Denis; Kostromin, Artem; Silyukov, Oleg; Zvereva, Irina.
In: Ceramics International, Vol. 45, No. 5, 2019, p. 5788-5795.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Proton mobility in Ruddlesden−Popper phase H2La2Ti3O10 studied by 1H NMR
AU - Shelyapina, Marina
AU - Nefedov, Denis
AU - Kostromin, Artem
AU - Silyukov, Oleg
AU - Zvereva, Irina
PY - 2019
Y1 - 2019
N2 - To study protons localization in H 1.83 K 0.17 La 2 Ti 3 O 10 ·0.17H 2 O and their motional characteristics, complementary Nuclear Magnetic Resonance (NMR) techniques have been applied. 1 H Magic Angle Spinning NMR evidences the presence of different proton containing species. By analyzing the temperature dependence of the 1 H MAS NMR spectrum we attribute the observed lines to interlayer H + in regular sites (isolated and in water rich environment), water protons and protons from various defects. The temperature behaviors of the spectral lines intensities and widths point out that intercalated water molecules are involved in translational motion that is confirmed by spin lattice relaxation rate (R 1 ) and spin-lattice relaxation rate in rotating frame (R 1ρ ) measurements. It has been shown that for a correct determination of the proton motional parameters the Kohlrausch-Williams-Watts correlation function must be used. Its application results in the following parameters of proton motion in the interlayer space of H 1.83 K 0.17 La 2 Ti 3 O 10 ·0.17H 2 O: E a = 0.194(2) eV, β = 0.28(1), τ 0 =6.2(1)×10 −10 s.
AB - To study protons localization in H 1.83 K 0.17 La 2 Ti 3 O 10 ·0.17H 2 O and their motional characteristics, complementary Nuclear Magnetic Resonance (NMR) techniques have been applied. 1 H Magic Angle Spinning NMR evidences the presence of different proton containing species. By analyzing the temperature dependence of the 1 H MAS NMR spectrum we attribute the observed lines to interlayer H + in regular sites (isolated and in water rich environment), water protons and protons from various defects. The temperature behaviors of the spectral lines intensities and widths point out that intercalated water molecules are involved in translational motion that is confirmed by spin lattice relaxation rate (R 1 ) and spin-lattice relaxation rate in rotating frame (R 1ρ ) measurements. It has been shown that for a correct determination of the proton motional parameters the Kohlrausch-Williams-Watts correlation function must be used. Its application results in the following parameters of proton motion in the interlayer space of H 1.83 K 0.17 La 2 Ti 3 O 10 ·0.17H 2 O: E a = 0.194(2) eV, β = 0.28(1), τ 0 =6.2(1)×10 −10 s.
KW - Layered perovskite-like titanate
KW - MAS NMR
KW - Ruddlesden–Popper phase
KW - Spin-lattice relaxation
KW - LN
KW - SELF-DIFFUSION
KW - PEROVSKITE-LIKE OXIDES
KW - IONIC-CONDUCTIVITY
KW - HYDRATION
KW - HYDROGEN
KW - NMR
KW - Ruddlesden-Popper phase
KW - LA
KW - DYNAMICS
KW - DIELECTRIC-RELAXATION BEHAVIOR
UR - http://www.scopus.com/inward/record.url?scp=85058145935&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2018.12.045
DO - 10.1016/j.ceramint.2018.12.045
M3 - Article
VL - 45
SP - 5788
EP - 5795
JO - Ceramics International
JF - Ceramics International
SN - 0272-8842
IS - 5
ER -
ID: 36488150