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Molecular motion of halogenated ethylammonium/[18]crown-6 supramolecular ions in nickel dithiolate magnetic crystals
| Title: | Molecular motion of halogenated ethylammonium/[18]crown-6 supramolecular ions in nickel dithiolate magnetic crystals |
| Authors: | Hasuo, Naohiro Browse this author | | Takahashi, Kiyonori Browse this author →KAKEN DB | | Hisaki, Ichiro Browse this author →KAKEN DB | | Kokado, Kenta Browse this author →KAKEN DB | | Nakamura, Takayoshi Browse this author →KAKEN DB |
| Issue Date: | 14-Apr-2021 |
| Publisher: | Royal Society of Chemistry |
| Journal Title: | CrystEngComm |
| Volume: | 14 |
| Start Page: | 2756 |
| End Page: | 2763 |
| Publisher DOI: | 10.1039/d1ce00253h |
| Abstract: | Supramolecular cations, consisting of ethylammonium derivatives (X-CH2CH2-NH3+) complexed with [18] crown-6, were incorporated into [Ni(dmit)(2)](-) crystals in order to promote molecular motion. Crystals of (X-CH2CH2-NH3+)([18]crown-6)[Ni(dmit)(2)](-) (1: X = H, 2: X = F, 3: X = Cl and 4: X = Br) were prepared for this purpose. Although large amplitude molecular motions do not occur in crystal 1, dynamic disorder of F-CH2 groups takes place between two sites in crystal 2. Similar disorder of Cl-CH2 groups along with rotation of [18]crown-6 molecules also exists in crystal 3. Crystal 4 exhibits dynamic disorder of Br-CH2-CH2 groups between four sites. This is especially the case for crystal 4 which undergoes a distinct dielectric response with relaxer-like behavior in the temperature dependence of the dielectric loss tangent. Interactions between [Ni(dmit)(2)](-) ions in all crystals are antiferromagnetic, and the magnitudes of the interactions are qualitatively consistent with the strength of intermolecular interactions estimated from transfer integrals, where interactions within [Ni(dmit)(2)](-) dimers are the larger than the others in all crystals. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/84850 |
| Appears in Collections: | 電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 高橋 仁徳
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