Phase transition and ring-puckering motion in a metal-organic perovskite [(CH_2)_3NH_2][Zn(HCOO)_3]

Asaji T.; Ito Y.; Seliger J.; ?agar V.; Gradi?ek A.; Apih T.

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Phase transition and ring-puckering motion in a metal-organic perovskite [(CH_2)_3NH_2][Zn(HCOO)_3]

机译：金属有机钙钛矿[（CH_2）_3NH_2] [Zn（HCOO）_3]中的相变和起皱运动

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Phase transitions in a metal-organic perovskite with an azetidinium cation, which exhibits giant polarizability, were investigated using differential scanning calorimetry (DSC) and ~1H nuclear magnetic resonance (NMR) measurements. The DSC results indicated successive phase transitions at 254 and 299 K. The temperature dependence of the spin-lattice relaxation time T _1 determined by NMR indicated that the activation energy for cation ring-puckering motion was 25 kJ mol~(-1) in phase I (T > 299 K). The potential energy at the transition state of puckering is expected to decrease when the potential for the motion becomes asymmetric with decreasing temperature in phases II and III. A possible mechanism for the onset of an extraordinarily large dielectric anomaly is discussed.

机译：使用差示扫描量热法（DSC）和〜1H核磁共振（NMR）测量研究了具有氮杂环丁烷阳离子的金属有机钙钛矿中的相变，该相态转变具有极强的极化性。 DSC结果表明在254和299 K处有连续的相变。通过NMR测定自旋晶格弛豫时间T _1的温度依赖性表明，阳离子环起皱运动的活化能为25 kJ mol〜（-1）。我（T> 299 K）。当运动的电势随着阶段II和III中温度的降低而变得不对称时，预计在起皱过渡状态时势能会降低。讨论了发生异常大介电异常的可能机制。

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《The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory》 |2012年第51期|共7页
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Asaji T.; Ito Y.; Seliger J.; ?agar V.; Gradi?ek A.; Apih T.;
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1. Phase transition and ring-puckering motion in a metal-organic perovskite [(CH_2)_3NH_2][Zn(HCOO)_3] [J] . Asaji T., Ito Y., Seliger J., The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory . 2012,第51期

机译：金属有机钙钛矿[（CH_2）_3NH_2] [Zn（HCOO）_3]中的相变和起皱运动
2. Ring-Puckering Motion of Azetidinium Cations in a Metal-Organic Perovskite [(CH2)(3)NH2][M(HCOO)(3)] (M = Zn, Mg)-A Thermal and H-1 NMR Relaxation Study [J] . Asaji Tetsuo, Ito Yoshiharu, Fujimori Hiroki, The journal of physical chemistry, C. Nanomaterials and interfaces . 2019,第7期

机译：金属有机钙钛矿中氮杂萘铵阳离子的环 - 褶皱运动[（CH2）（3）NH 2] [M（HCOO）（3）]（M = Zn，Mg）-A热和H-1 NMR松弛研究
3. Phase Transition and Cationic Motion in a Metal-Organic Perovskite, Dimethylammonium Zinc Formate [(CH3)2NH2][Zn(HCOO)3] [J] . Tetsuo Asaji, Kayo Ashitomi The journal of physical chemistry, C. Nanomaterials and interfaces . 2013,第19期

机译：金属有机钙钛矿二甲铵锌格式[[CH3）2NH2] [Zn（HCOO）3]中的相变和阳离子运动
4. Phase transitions and dielectric properties in Bi(Zn1/2Ti1/2)O3-ABO3 perovskite solid solutions [C] . IEEE International Symposium on the Applications of Ferroelectrics . 2008

机译：Bi（Zn1 / 2Ti1 / 2）o3-abo3钙钛矿固体溶液中的相变和介电性能
5. In-situ TEM investigation of the phase transitions in perovskite ferroelectrics. [D] . Qu, Weiguo. 2008

机译：钙钛矿铁电体中相变的原位TEM研究。
6. Mechanism of the order–disorder phase transition and glassy behavior in the metal-organic framework (CH3)2NH2Zn(HCOO)3 [O] . Tiglet Besara, Prashant Jain, Naresh S. Dalal, 2011

机译：金属有机骨架（CH3）2NH2 Zn（HCOO）3中有序-无序相变的机制和玻璃态行为
7. Mechanism of the order–disorder phase transition, and glassy behavior in the metal-organic framework [(CH3)2NH2]Zn(HCOO)3 [O] . Besara, Tiglet, Jain, Prashant, Dalal, Naresh S., 2011

机译：金属有机骨架[（CH3）2NH2] Zn（HCOO）3中有序-无序相变的机制和玻璃态行为

Phase transition and ring-puckering motion in a metal-organic perovskite [(CH_2)_3NH_2][Zn(HCOO)_3]

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