TY - JOUR
T1 - A Small Lattice Change Induces Significant Dynamic Changes of CH3NH3+ Caged in Hybrid Perovskite Crystals
T2 - Toward Understanding the Interplay between Host Lattices and Guest Molecules
AU - Wang, Jiachen
AU - Zhang, Xi
AU - Graf, Robert
AU - Li, Yi
AU - Yang, Guang
AU - Fu, Xiao Bin
AU - Ma, Jia Qi
AU - Yao, Ye Feng
N1 - Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/6/3
Y1 - 2019/6/3
N2 - Two perovskite-type compounds, (MA)2[B′Co(CN)6] (MA = methylammonium, B′ = K(I) and Na(I)), have very similar structures, but exhibit marked differences in the phase and dielectric transitions. Solid state 2H NMR studies reveal the detailed dynamic changes of the caged methylammonium (MA) cations before and after the phase transitions, which are correlated with the different dielectric states of the compounds. Using solid state 59Co NMR, the dynamic changes of the host lattices before and after the transitions, which accompany the changes in the dynamics of the caged MA cations, are unveiled, demonstrating the intriguing interplay between the MA cations and the host lattices. On the basis of these observations, the molecular origins of the dielectric transitions are discussed in detail.
AB - Two perovskite-type compounds, (MA)2[B′Co(CN)6] (MA = methylammonium, B′ = K(I) and Na(I)), have very similar structures, but exhibit marked differences in the phase and dielectric transitions. Solid state 2H NMR studies reveal the detailed dynamic changes of the caged methylammonium (MA) cations before and after the phase transitions, which are correlated with the different dielectric states of the compounds. Using solid state 59Co NMR, the dynamic changes of the host lattices before and after the transitions, which accompany the changes in the dynamics of the caged MA cations, are unveiled, demonstrating the intriguing interplay between the MA cations and the host lattices. On the basis of these observations, the molecular origins of the dielectric transitions are discussed in detail.
UR - https://www.scopus.com/pages/publications/85066120804
U2 - 10.1021/acs.inorgchem.9b00497
DO - 10.1021/acs.inorgchem.9b00497
M3 - 文章
C2 - 31091094
AN - SCOPUS:85066120804
SN - 0020-1669
VL - 58
SP - 7426
EP - 7432
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 11
ER -