NDLI: Switchable dielectric phase transition induced by a twisting transformation in diglycine methanesulfonate.

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Switchable dielectric phase transition induced by a twisting transformation in diglycine methanesulfonate.

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Switchable dielectric phase transition induced by a twisting transformation in diglycine methanesulfonate.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Zhou, Pan Sun, Zhihua Zhang, Shuquan Chen, Tianliang Ji, Chengmin Zhao, Sangen Luo, Junhua
Description	Author Affiliation: Zhou P ( Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002 (China))
Abstract	A new glycine-based reversible phase transition compound diglycine methanesulfonate (1) has been successfully synthesized. Differential scanning calorimetry (DSC) measurements of 1 showed a pair of broad peaks around 134âK (T(c)=phase transition temperature) with a slight thermal hysteresis during the heating/cooling cycle, thereby indicating that this compound undergoes a reversible second-order phase transition. Dielectric measurements further confirmed the phase transition and revealed a switchable response to the ambient temperature change for the dielectric constants of 1, namely, the dielectric constants have a distinctive step-like anomaly switching between a high dielectric state in the room temperature phase (RTP) and a low state in the low temperature phase (LTP). Variable-temperature single-crystal X-ray diffraction analyses show that 1 undergoes an atypical transition from the space group P21/m in the RTP to P21/c in the LTP. The origin of the switchable dielectric phase transition is ascribed to the movement of the moieties in 1 from the equilibrium position, and this stems from the twisting of the molecules in the compound. We believe that these findings will be useful in exploring switchable dielectric phase transition materials.
File Format	HTM / HTML
ISSN	18614728
Issue Number	4
Volume Number	9
e-ISSN	1861471X
Journal	Chemistry - An Asian Journal
Language	English
Publisher	Wiley-VCH
Publisher Date	2014-04-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Research Support, Non-u.s. Gov't Chemistry Temperature Molecular Conformation Crystallography, X-ray Discipline Chemistry Calorimetry, Differential Scanning Glycylglycine Mesylates Phase Transition Journal Article
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry

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