Eco‐Friendly and Highly Efficient Light‐Emission Ferroelectric Scintillators by Precise Molecular Design

Li, Junyi; Wang, Changfeng; Wu, Haodi; Liü, Lang; Xu, Qiu-Ling; Ye, Siyu; Tong, Lewei; Chen, Xiang; Gao, Qiang; Hou, Yun-Long; Wang, Fang‐Ming; Tang, Jiang; Chen, Lizhuang; Zhang, Wan-Ying

doi:10.1002/adfm.202102848

Cited by 60 publications

(40 citation statements)

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“…The introduction of halogen atoms into organic cations can also increase the potential energy for cationic dynamic motions, which is an effective method to enhance the transition temperature of switching materials. 42–45 However, achieving one with a multi-channel response feature, suitable transition temperature, outstanding SHG signal, and excellent luminescence is still a challenge. 18,46–48…”

Section: Introductionmentioning

confidence: 99%

Multi-functional hybrid perovskites with triple-channel switches and optical properties

Lun

Zhou

et al. 2022

J. Mater. Chem. C

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Section: Introductionmentioning

confidence: 99%

Multi-functional hybrid perovskites with triple-channel switches and optical properties

Lun

Zhou

et al. 2022

J. Mater. Chem. C

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“…The “fluorination effect” has been certified to be an effective molecular design strategy, which can accurately adjust the physical and chemical properties through a modification of the molecular structure. , For example, it has been found that the phase transition temperature can be effectively increased by substituting hydrogen atoms with fluorine . This is because a fluorine atom has the characteristics of strong electronegativity and small atomic radius, when a fluorine atom is introduced to the organic cation of an OIHP, increasing the secondary bonding interaction between inorganic and organic components.…”

Section: Introductionmentioning

confidence: 99%

The Role of Fluorine-Substituted Positions on the Phase Transition in Organic–Inorganic Hybrid Perovskite Compounds

Rao

You

et al. 2021

Inorg. Chem.

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Although research on organic–inorganic hybrid perovskites (OIHPs) has grown exponentially in the past two decades, the high phase transition temperature of OIHP materials is still one of the insurmountable difficulties. Herein, a series of A2BX4 type OIHP materials [(2,n-DFBA)2PbCl4] (n = 3, for 1; n = 4, for 2; n = 5, for 3; n = 6, for 4) have been prepared by reactions of double-substituted difluorobenzylamine (difluorobenzylamine = DFBA) with lead chloride in concentrated HCl aqueous solution. It was found the OIHP compounds 1–3 proceed a switchable phase transition with phase transition temperatures (T c) at 449 K (1), 462 K (2) and 500 K (3), higher than that of the parent compound [(BA)2PbCl4] (BA = benzylammonium) at 438 K, but compound 4 exhibits no phase transition. A crystal structure analysis elucidated that the organic template ligands DFBA lead in the inorganic part in compounds 1–3 to a two-dimensional (2D) perovskite structure, while that in compound 4 leads to a one-dimensional (1D) chain structure. The different double-substituted positions of fluorine atoms on benzylamine have important influences on the phase transition in compounds 1–4.

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“…Moreover, 2 shows excellent thermo‐stability (Figure S3, SI). The Curie temperature reaches 393 K, which exceeds those of many molecular ferroelectrics such as (pyrrolidinium)MnBr 3 (219 K), [ 36 ] [C 4 H 10 N] CdCl 3 (241 K) [ 37 ] and [FEtQ] 2 MnBr 4 (FEtQ = 1‐fluoroethyl‐quinuclidine) (378 K) [ 38 ] and is comparable to that of the commercial ferroelectric BaTiO 3 (393 K). This work provides a new molecular ferroelectrics design method based on anions and enriches the high T c ferroelectric materials family.…”

Section: Background and Originality Contentmentioning

confidence: 99%

Anions Distorting Triggering Ferroelectricity in a Molecular Crystal^†

Liu

Liang‐Tong

et al. 2022

Chin. J. Chem.

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Comprehensive Summary Recently, molecular ferroelectrics have attracted more and more attention due to their structural diversity, low cost of manufacture, and environmental‐friendly processing. However, most of the design strategies for molecular ferroelectrics have focused on the selection and modification of cations, and the use of anions has been rarely reported. Here, introducing distorted [CuBr4]2– tetrahedra, we obtained a high curie temperature (Tc) ferroelectric, [cyclopentylammonium]2CuBr4, with a Tc as high as 393 K, and exceeding commercial and most of reported molecular ferroelectric BaTiO3 (393 K). Variable‐temperature hysteresis loop shows the nonlinear P‐E loop of the crystal under a wide temperature range. Variable‐temperature single‐crystal X‐ray diffraction revealed that the Aizu expression can be written as mmmFmm2. In short, this work will inspire more creative strategies by exploiting the tunability of the anion module.

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Eco‐Friendly and Highly Efficient Light‐Emission Ferroelectric Scintillators by Precise Molecular Design

Abstract: Since the first ferroelectric, Rochelle salt, was discovered in 1920, large amounts of organic, inorganic, and hybrid ferroelectrics with fascinating physical properties have been widely

Cited by 60 publications

References 57 publications

Multi-functional hybrid perovskites with triple-channel switches and optical properties

Multi-functional hybrid perovskites with triple-channel switches and optical properties

The Role of Fluorine-Substituted Positions on the Phase Transition in Organic–Inorganic Hybrid Perovskite Compounds

Anions Distorting Triggering Ferroelectricity in a Molecular Crystal^†

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Eco‐Friendly and Highly Efficient Light‐Emission Ferroelectric Scintillators by Precise Molecular Design

Abstract: Since the first ferroelectric, Rochelle salt, was discovered in 1920, large amounts of organic, inorganic, and hybrid ferroelectrics with fascinating physical properties have been widely

Cited by 60 publications

References 57 publications

Multi-functional hybrid perovskites with triple-channel switches and optical properties

Multi-functional hybrid perovskites with triple-channel switches and optical properties

The Role of Fluorine-Substituted Positions on the Phase Transition in Organic–Inorganic Hybrid Perovskite Compounds

Anions Distorting Triggering Ferroelectricity in a Molecular Crystal†

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Product

Resources

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Anions Distorting Triggering Ferroelectricity in a Molecular Crystal^†