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Zhang H, Guo W, Du W, Peng Z, Wei Z, Cai H. A Metal-Free Molecular Ferroelectric [4-Me-cyclohexylamine]ClO 4 Introduced by Boat and Chair Conformations of Cyclohexylamine. Chemistry 2024; 30:e202302671. [PMID: 37920946 DOI: 10.1002/chem.202302671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/24/2023] [Accepted: 11/02/2023] [Indexed: 11/04/2023]
Abstract
Organic ferroelectrics have received a great deal of interest due to their exclusive properties. However, organic ferroelectrics have not been fully explored, which hinders their practical application. Here, we presented a novel metal-free organic molecular ferroelectric [4-MCHA][ClO4 ] (1) (4-MCHA=trans-4-methylcyclohexylamine), which exhibits an above-room-temperature of 328 K. Strikingly, the single crystal structure analysis of 1 shows that the driving force of phase transition is related to the interesting chair-boat conformation change of 4-MCHA cation, in addition to the order-disorder transition of ClO4 - anion. Using piezoelectric response force microscopy (PFM), the presence of domains and the implemented polarization switching were clearly observed, which explicitly determined the presence of room-temperature ferroelectricity of 1. As far as we know, the ferroelectric phase transition mechanism attributed to the conformational change in a trans isomeric cation is very rare. This research enriched the path of designing ferroelectric materials and smart materials.
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Affiliation(s)
- Haina Zhang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang City, 330031, Jiangxi Province, P. R. China
| | - Wenjing Guo
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang City, 330031, Jiangxi Province, P. R. China
| | - Wenqing Du
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang City, 330031, Jiangxi Province, P. R. China
| | - Ziqin Peng
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang City, 330031, Jiangxi Province, P. R. China
| | - Zhenhong Wei
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang City, 330031, Jiangxi Province, P. R. China
| | - Hu Cai
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang City, 330031, Jiangxi Province, P. R. China
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2
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Zhang H, Wang L, Guo W, Cai H, Wei Z. An organic-inorganic hybrid material [Me 3NCH 2CH 2F]FeBr 4 exhibits three-step SHG on/off. Chem Commun (Camb) 2023; 59:13442-13445. [PMID: 37881000 DOI: 10.1039/d3cc04700h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
A novel solid-state second harmonic generation (SHG) organic-inorganic hybrid switch [Me3NCH2CH2F]FeBr4 (1) exhibits genuine three-step "on-off-on-off" SHG-switching above-room temperature, which has potential applications in multi-step optical devices.
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Affiliation(s)
- Haina Zhang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, P. R. China.
| | - Lingyu Wang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, P. R. China.
| | - Wenjing Guo
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, P. R. China.
| | - Hu Cai
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, P. R. China.
| | - Zhenhong Wei
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, P. R. China.
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3
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Wang ZJ, Wu LK, Wang N, Hu QQ, Li JR, Ye HY. Tuning the luminescent properties of a three-dimensional perovskite ferroelectric (Me-Hdabco)CsI 3via Sn(II) doping. Dalton Trans 2023; 52:2799-2803. [PMID: 36752146 DOI: 10.1039/d2dt03939g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
As promising functional materials, organic-inorganic hybrid metal halide perovskites have attracted significant interest because of their excellent photovoltaic performance. However, although considerable efforts have been made, three-dimensional (3D) metal halide perovskites beyond lead halides have been rarely reported. Herein, a new 3D organic-inorganic hybrid ferroelectric material (Me-Hdabco)CsI3 (1, Me-Hdabco = N-methyl-1,4-diazoniabicyclo[2.2.2]octane) was synthesized and characterized. 1 underwent a ferroelectric to paraelectric phase transition at Tc = 441 K, which was investigated by differential scanning calorimetry (DSC), dielectric measurements, and variable temperature structural analyses. Moreover, 1 shows a clear ferroelectric domain switching recorded by piezoelectric force microscopy. More interestingly, the pristine colorless crystal of 1 has no photoluminescence properties, while 10% Sn(II):(Me-Hdabco)CsI3 shows intense photoluminescence with a quantum yield of 8.90% under UV excitation. This finding will open up a new avenue to probe organic-inorganic hybrid multifunctional materials integrated ferroelectric and photoluminescence.
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Affiliation(s)
- Ze-Jie Wang
- Chaotic Matter Science Research Center, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, P. R. China.
| | - Ling-Kun Wu
- Chaotic Matter Science Research Center, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, P. R. China.
| | - Na Wang
- Chaotic Matter Science Research Center, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, P. R. China.
| | - Qian-Qian Hu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P.R. China
| | - Jian-Rong Li
- Chaotic Matter Science Research Center, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, P. R. China. .,State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P.R. China
| | - Heng-Yun Ye
- Chaotic Matter Science Research Center, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, P. R. China.
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Li B, Rao W, You X, Wang P, Wei J, Wei Z, Zhang H, Cai H. Three-Dimensional Perovskite Phase Transition Materials with Switchable Second Harmonic Generation Properties Introduced by Homochiral (1 S,4 S)-2,5-Diazabicyclo[2.2.1]-heptane. Inorg Chem 2023; 62:942-949. [PMID: 36602537 DOI: 10.1021/acs.inorgchem.2c03740] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Switchable second harmonic generation (SHG) materials have potential applications in information storage, signal processing, and so on because they can switch between SHG-on and SHG-off states. In this work, we designed and synthesized three organic-inorganic hybrid Rb halide three-dimensional (3D) perovskite materials [1S,4S 2,5-2.2.1-H2dabch]RbX3·0.5H2O (X = Cl, 1; Br, 2; I, 3) based on the chiral 1S,4S-2,5-diazabicyclo[2.2.1]heptane (1S,4S-2,5-2.2.1-dabch). The selection of homochiral organic cations ensures that the compounds 1∼3 crystallize in the noncentrosymmetric and chiral space group P212121, which further leads to reversible SHG responses of the three compounds. Through differential scanning calorimetry (DSC) and dielectric measurements, it revealed that the phase transition point of the compounds 1∼3 increased with RbCl, RbBr, and RbI. This is because the hydrogen interaction H···X between the inorganic framework [RbX3]n and the organic cation [1S,4S-2,5-2.2.1-H2dabch]2+ is increased with the order of I > Br > Cl. This study can provide an effective molecular design strategy for the exploration and construction of temperature-tunable SHG switching materials.
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Affiliation(s)
- Bo Li
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Wenjun Rao
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Xiuli You
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, Jiangxi Province, People's Republic of China
| | - Pan Wang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Jing Wei
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Zhenhong Wei
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Haina Zhang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Hu Cai
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
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5
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Wang P, Zhang M, Wei Z, Du W, Peng Z, Cai H. 3D Perovskite (1,5-3.2.2-H 2dabcn)CsBr 3 with Reverse Symmetry Breaking. Inorg Chem 2022; 61:16414-16420. [PMID: 36197835 DOI: 10.1021/acs.inorgchem.2c02497] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Even though hybrid organic-inorganic perovskites (HOIPs) have been studied by many scholars in recent years, there are not many reports on three-dimensional (3D) alkali metal cesium halide perovskites. Here, we report an unprecedented 3D HOIP molecule (1,5-3.2.2-H2dabcn)CsBr3 (1), in which the 3D anionic framework is constructed by corner-sharing CsBr6 octahedra and organic cations [1,5-3.2.2-H2dabcn]2+ are located in the cavities formed by the octahedra. Organic cations interact with an inorganic metal frame via two N-H···Br hydrogen bonds. Compound 1 undergoes a reversible order-disorder phase transition and exhibits switchable dielectric and second-harmonic generation (SHG) properties. Interestingly, product 1 crystallizes in a non-centrosymmetric space group Pmn21 at the low-temperature phase (LTP) and transforms into a centrosymmetric space group P2/m at the high-temperature phase (HTP). The space group Pmn21 in the LTP has a higher symmetry than P2/m in the HTP. This inverted symmetry breaking is very unusual.
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Affiliation(s)
- Pan Wang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Mengxia Zhang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Zhenhong Wei
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Wenqing Du
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Ziqin Peng
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Hu Cai
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
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