Tunable and Switchable Dielectric Constant in an Amphidynamic Crystal
The inclusion compound [(CH3)2NH2]2[KCo(CN)6] exhibits a marked temperature-dependent dielectric constant and can be considered as a model of tunable and switchable dielectric materials. Crystal structure and solid-state NMR studies reveal a switchable property between low and high dielectric sta...
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| Veröffentlicht in: | Journal of the American Chemical Society 2013-04, Vol.135 (14), p.5230-5233 |
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| container_issue | 14 |
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| container_title | Journal of the American Chemical Society |
| container_volume | 135 |
| creator | Zhang, Wen Ye, Heng-Yun Graf, Robert Spiess, Hans W Yao, Ye-Feng Zhu, Run-Qiang Xiong, Ren-Gen |
| description | The inclusion compound [(CH3)2NH2]2[KCo(CN)6] exhibits a marked temperature-dependent dielectric constant and can be considered as a model of tunable and switchable dielectric materials. Crystal structure and solid-state NMR studies reveal a switchable property between low and high dielectric states around 245 K. This originates from an order–disorder phase transition of the system, changing the dynamics of the polar dimethylammonium (DMA) cation. Furthermore, the tuning of the dielectric constant at temperatures below the phase transition point is related to increasing angular pretransitional fluctuations of the dipole moment of DMA. |
| doi_str_mv | 10.1021/ja3110335 |
| format | Article |
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Crystal structure and solid-state NMR studies reveal a switchable property between low and high dielectric states around 245 K. This originates from an order–disorder phase transition of the system, changing the dynamics of the polar dimethylammonium (DMA) cation. 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Am. Chem. Soc</addtitle><date>2013-04-10</date><risdate>2013</risdate><volume>135</volume><issue>14</issue><spage>5230</spage><epage>5233</epage><pages>5230-5233</pages><issn>0002-7863</issn><eissn>1520-5126</eissn><abstract>The inclusion compound [(CH3)2NH2]2[KCo(CN)6] exhibits a marked temperature-dependent dielectric constant and can be considered as a model of tunable and switchable dielectric materials. Crystal structure and solid-state NMR studies reveal a switchable property between low and high dielectric states around 245 K. This originates from an order–disorder phase transition of the system, changing the dynamics of the polar dimethylammonium (DMA) cation. Furthermore, the tuning of the dielectric constant at temperatures below the phase transition point is related to increasing angular pretransitional fluctuations of the dipole moment of DMA.</abstract><cop>United States</cop><pub>American Chemical Society</pub><pmid>23517129</pmid><doi>10.1021/ja3110335</doi><tpages>4</tpages></addata></record> |
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| title | Tunable and Switchable Dielectric Constant in an Amphidynamic Crystal |
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