2011 Fiscal Year Final Research Report
Dielectric Anomaly and Structural Transition of Guest Molecules Incorporated in Nanoporous Crystals
| Project/Area Number |
21750153
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Functional materials chemistry
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| Research Institution | Nihon University |
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Principal Investigator |
ZHOU Biao 日本大学, 文理学部, 助教 (80434067)
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| Project Period (FY) |
2009 – 2011
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| Keywords | ポーラス結晶 / 誘電性物質 / ゲスト分子 / 分子運動の自由度 |
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| Research Abstract |
Guest water molecules confined in channels of porous crystals [Cu_3La_2(IDA)_6](H_2O)_n exhibited antiferroelectric behaviors at high temperatures, and dielectric constants(ε) became very small at around 170 K. These puzzling temperature dependences ofεare consistent with the results of molecular dynamics simulations. And, metal-organic perovskite with four-membered ring azetidinium cations, [(CH_2)_3NH_2][Cu(HCOO)_3] exhibited a very broad and unprecedentedly large dielectric peak(～7×10^5 at 1 kHz) near 280 K. It is highly possible related to the ring-puckering instability of the four-membered ring ammonium cation.
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