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Song N, Ying TT, Tan YH, Tang YZ, Liao J, Wang LJ, Wang FX, Wan MY. 2-Chloroethylamine·trifluoromethanesulfonate combined with 18-crown-6: a ferroelectric with excellent dielectric switching properties. Dalton Trans 2023; 52:11196-11202. [PMID: 37522327 DOI: 10.1039/d3dt01426f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/01/2023]
Abstract
Ferroelectric materials are not only important electronic functional materials, but also considered as the most promising intelligent basic materials, because they show good application prospects. Therefore, it is an urgent task to develop and explore new ferroelectric material systems. In addition, the most important feature of crown ethers is their ability to complex with positive ions, which is extremely useful in synthesis. We report that [NH3C2H4Cl(18-crown-6)](CF3SO3) (1) has a phase transition temperature Tc = 255 K, and there is an obvious SHG switch below Tc. At the same time, the saturation polarization value Ps = 1.25 μC cm-2 is obtained from the hysteresis loop, which directly proves the ferroelectric nature of compound 1. It is noteworthy that the second harmonic response test of compound 1 shows a symmetric transition from a non-centrosymmetric to a centrosymmetric point group, that is a symmetry break from the paraelectric phase to the ferroelectric phase. This work is expected to promote the further exploration of organic crown ether ferroelectrics and provide a way to design and synthesize organic crown ether ferroelectrics.
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Affiliation(s)
- Ning Song
- Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Faculty of Materials, Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China.
| | - Ting-Ting Ying
- Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Faculty of Materials, Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China.
| | - Yu-Hui Tan
- Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Faculty of Materials, Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China.
| | - Yun-Zhi Tang
- Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Faculty of Materials, Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China.
| | - Juan Liao
- Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Faculty of Materials, Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China.
| | - Li-Juan Wang
- Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Faculty of Materials, Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China.
| | - Fang-Xin Wang
- Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Faculty of Materials, Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China.
| | - Ming-Yang Wan
- Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Faculty of Materials, Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China.
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Xu Q, Zhao MM. 4-Bromo-3-methyl-anilinium perchlorate 18-crown-6 clathrate. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o579. [PMID: 21522341 PMCID: PMC3052115 DOI: 10.1107/s1600536811003540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2011] [Accepted: 01/27/2011] [Indexed: 11/11/2022]
Abstract
The reaction of 4-bromo-3-methyl-anilinium perchlorate and 18-crown-6 in methanol solution yielded the title compound, C(7)H(9)BrN(+)·ClO(4) (-)·C(12)H(24)O(6). The protonated 4-bromo-3-methyl-amine unit contains one -NH(3) (+) substituent, resulting in a 1:1 supra-molecular rotator-stator structure, (C(7)H(9)Br-NH(3) (+))(18-crown-6), through three bifurcated N-H⋯(O,O) hydrogen bonds between the ammonium group of the cation and the O atoms of the crown ether mol-ecule.
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Affiliation(s)
- Qian Xu
- Ordered Matter Science Research Center, College of Chemistry and Chemical, Engineering, Southeast University, Nanjing 211189, People's Republic of China
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