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Magnetic Sponge with Neutral-Ionic Phase Transitions
- Source :
- Advanced Science
- Publication Year :
- 2017
- Publisher :
- Wiley, 2017.
-
Abstract
- Phase transitions caused by the charge instability between the neutral and ionic phases of compounds, i.e., N–I phase transitions, provide avenues for switching the intrinsic properties of compounds related to electron/spin correlation and dipole generation as well as charge distribution. However, it is extremely difficult to control the transition temperature (T c) for the N–I phase transition, and only chemical modification based on the original material have been investigated. Here, a design overview of the tuning of N–I phase transition by interstitial guest molecules is presented. This study reports a new chain coordination‐polymer [Ru2(3,4‐Cl2PhCO2)4TCNQ(EtO)2]∙DCE (1‐DCE; 3,4‐Cl2PhCO2 − = 3,4‐dichlorobenzoate; TCNQ(EtO)2 2,5‐diethoxy‐7,7,8,8‐tetracyanoquinodimethane; and DCE = 1,2‐dichloroethane) that exhibits a one‐step N–I transition at 230 K (= T c) with the N‐ and I‐states possessing a simple paramagnetic state and a ferrimagnetically correlated state for the high‐ and low‐temperature phases, respectively. The T c continuously decreases depending on the content of DCE, which eventually disappears with the complete evacuation of DCE, affording solvent‐free compound 1 with the N‐state in the entire temperature range (this behavior is reversible). This is an example of tuning the in situ T c for the N–I phase transition via the control of the interstitial guest molecules.
- Subjects :
- Phase transition
Materials science
General Chemical Engineering
General Physics and Astronomy
Medicine (miscellaneous)
Ionic bonding
010402 general chemistry
01 natural sciences
Biochemistry, Genetics and Molecular Biology (miscellaneous)
Paramagnetism
Molecule
host–guest chemistry
General Materials Science
neutral–ionic phase transitions
donor–acceptor systems
Full Paper
010405 organic chemistry
Transition temperature
General Engineering
Charge density
Full Papers
Atmospheric temperature range
0104 chemical sciences
Dipole
Chemical physics
chain structures
magnetic properties
Subjects
Details
- ISSN :
- 21983844
- Volume :
- 5
- Database :
- OpenAIRE
- Journal :
- Advanced Science
- Accession number :
- edsair.doi.dedup.....b8f7195697382c0029a2dc0bdaeab4da