NDLI: Tuneable mechanical and dynamical properties in the ferroelectric perovskite solid solution [NH3NH2]1−x[NH3OH]xZn(HCOO)3

Content Provider	Royal Society of Chemistry (RSC)
Author	Sun, Shijing Henke, Sebastian Kieslich, Gregor Cheetham, Anthony K. Grey, Clare P. Kumagai, Shohei Yamashita, Masahiro Forse, Alexander C.
Copyright Year	2016
Abstract	We report how mechanical and dynamical properties in formate-based perovskites can be manipulated by the preparation of an A-site solid-solution. In the series [NH3NH2]1−x[NH3OH]xZn(HCOO)3 with xmax = 0.48, the substitution of [NH3NH2]+ by [NH3OH]+ is accompanied by a series of complex changes in crystal chemistry which are analysed using PXRD, SCXRD, 1H solid state NMR, DSC and nanoindentation. NMR shows increased motion of [NH3NH2]+ in [NH3NH2]0.52[NH3OH]0.48Zn(HCOO)3, which results in a shift of the ferroelectric-to-paraelectric phase transition temperature from Tc = 352 K (x = 0) to Tc = 324 K (x = 0.48). Additionally, the loss of hydrogen bonds directly influences the mechanical response of the framework; the elastic moduli and hardnesses decrease by around 25% from E110 = 24.6 GPa and H110 = 1.25 GPa for x = 0, to E110 = 19.0 GPa and H110 = 0.97 GPa for x = 0.48. Our results give an in-depth insight into the crystal chemistry of ABX3 formate perovskites and highlight the important role of hydrogen bonding and dynamics.
Starting Page	5108
Ending Page	5112
Page Count	5
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	7
Issue Number	8
Journal	Chemical Science
DOI	10.1039/c6sc01247g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Organic chemistry Elastic modulus XG Technology DSC Hydrogen Nanoindentation Formate Nuclear magnetic resonance Phase transition
Content Type	Text
Resource Type	Article
Subject	Chemistry

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