Hydrogen-bonded and supramolecular ferroelectricity in a new hybrid (C12H25NH3)2CoCl4

Abdel‐Kader, M. M.; Abdel-Mohsen, M. A.

doi:10.1088/2053-1591/aaf083

Cited by 6 publications

(5 citation statements)

References 58 publications

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“…1 H spin–lattice relaxation time in the studied compounds consists of two contributions: the first one, 1 H– 1 H, results from the dipole–dipole interactions between protons of the pyrrolidinium cations and the second one, the 1 H– 59 Co relaxation pathway, results from the dipole–dipole couplings of protons with the unpaired electron spin of 59 Co. 22,24,28,34,55–57 where the J ( ω ) are the spectral density functions being Fourier transforms of time correlation functions describing the stochastic fluctuations of the dipole–dipole interaction. The spectral densities taken at ω H and ω S are associated with different correlation times, τ eff,1 and τ eff,2 , respectively, defined as τ eff,1 −1 = τ c −1 + 1/ T 1,e and τ eff,2 −1 = τ c −1 + 1/ T 2,e , where T 1,e and T 2,e are electron spin–lattice and electron spin–spin relaxation rates, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The spectral densities taken at ω H and ω S are associated with different correlation times, τ eff,1 and τ eff,2 , respectively, defined as τ eff,1 −1 = τ c −1 + 1/ T 1,e and τ eff,2 −1 = τ c −1 + 1/ T 2,e , where T 1,e and T 2,e are electron spin–lattice and electron spin–spin relaxation rates, respectively. 22,24,28,34,55–57 C HH and C HCo are relaxation dipole–dipole constants. The C HCo relaxation constant is defined as:where r HCo is an effective inter atomic distance, γ H is the proton gyromagnetic ratio and γ s is the electron gyromagnetic ratio, and S is the electron spin quantum number for Co( ii ) S = 3/2.…”

Section: Resultsmentioning

confidence: 99%

“…1 H spin-lattice relaxation time in the studied compounds consists of two contributions: the first one, 1 H-1 H, results from the dipole-dipole interactions between protons of the pyrrolidinium cations and the second one, the 1 H- 59 Co relaxation pathway, results from the dipole-dipole couplings of protons with the unpaired electron spin of 59 Co. 22,24,28,34,55-57…”

Section: H Nmr Spin-lattice Relaxation Time Studiesmentioning

confidence: 99%

Section: H Nmr Spin-lattice Relaxation Time Studiesmentioning

confidence: 99%

“…To the best of our knowledge, only three ferroelectrics have been synthesized so far; the dimethylammonium analog – [NH 2 (CH 3 ) 2 ] 2 CoCl 4 , 21 PT ( P 2 1 / n → polar) and n -dodecylammonium – (C 12 H 25 NH 3 ) 2 CoCl 4 . 22 The most interesting appears to be an organic–inorganic hybrid (diisobutylammonium) 3 ClCoCl 4 , with a high Curie temperature of 372.5 K and significant spontaneous polarization of 4.6 μC cm −2 . This is the first example of a hybrid photosensitive ferroelectric that is strongly sensitive to specific wave band illumination.…”

Section: Introductionmentioning

confidence: 99%

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Symmetry-breaking phase transitions, dielectric and magnetic properties of pyrrolidinium-tetrahalidocobaltates

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et al. 2022

Inorg. Chem. Front.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: H Nmr Spin-lattice Relaxation Time Studiesmentioning

confidence: 99%

Section: H Nmr Spin-lattice Relaxation Time Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Symmetry-breaking phase transitions, dielectric and magnetic properties of pyrrolidinium-tetrahalidocobaltates

Ksiądzyna¹,

Kinzhybalo²,

Bieńko³

et al. 2022

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Soft Ferroelectrics Enabling High‐Performance Intelligent Photo Electronics

2020

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There has been a significant success in the synthesis of materials based on novel ferroelectric switching principles [10,11] and crystal engineering [12] (maximizing the ferroelectric properties for interface engineering to optimize contacts in devices). One evidence is that soft ferroelectrics have become crucial, particularly with the recent advancements in humanconnected electronics owing to extensive research success in human-machine interactive information, human safety, and human sustainability. [13] For instance, soft ferroelectrics with nonvolatile information storage capacity have been used in neuromorphic synaptic devices that can mimic the human neuronal system. [14][15][16][17][18][19][20][21] Relying on the piezoelectric properties possess by all soft ferroelectrics, a variety of tactile sensing memories that can simultaneously detect and store various tactile stimuli, such as pressure and friction, have been developed. [22,23] Specifically, soft ferroelectric domains embedded in semiconducting mediums are electrically programmable in remnant polarization, and the resulting programmed electric field successfully modulates the carrier transport of the semiconducting layer, leading to the development of not only high-performance photoelectronic devices but also those with new functionalities. [24,25] To design soft ferroelectrics materials for human-connected electronics properly, a comprehensive understanding of ferroelectric molecular switching mechanisms is necessary. It is also critical for understanding the intrinsic properties (such as working temperature, power consumption, amount of internal field related to Curie temperature, coercive field, and remnant polarization) of soft ferroelectrics that are technologically appropriate for device operation. This will make them suitable for developing human-connected electronics. Thus, proper screening of soft ferroelectrics by targeting complementary electronic devices is also necessary. Efforts should be made to control the crystallization during the preparation of thin, uniform, and pinhole-free soft ferroelectric films by controlling the solute-solvent chemistry of composition. The recent development of these micro-and nanostructured approaches suggests that multiscale, multidimension, and periodic microor nanopatterned soft ferroelectrics will not only significantly enhance the efficiency of various photoelectronic devices, but it will also result in new novel functionalities (such as anisotropic and directional photoelectronic properties) and thus Soft ferroelectrics based on organic and organic-inorganic hybrid materials have gained much interest among researchers owing to their electrically programmable and remnant polarization. This allows for the development of numerous flexible, foldable, and stretchable nonvolatile memories, when combined with various crystal engineering approaches to optimize their performance. Soft ferroelectrics have been recently considered to have an important role in the emerging human-connected electronics that involve...

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Palladium-induced transformation of nematic liquid crystals to robust metallogel comprising self-assembled nanowires

2019

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Hydrogen-bonded and supramolecular ferroelectricity in a new hybrid (C₁₂H₂₅NH₃)₂CoCl₄

Cited by 6 publications

References 58 publications

Symmetry-breaking phase transitions, dielectric and magnetic properties of pyrrolidinium-tetrahalidocobaltates

Symmetry-breaking phase transitions, dielectric and magnetic properties of pyrrolidinium-tetrahalidocobaltates

Soft Ferroelectrics Enabling High‐Performance Intelligent Photo Electronics

Palladium-induced transformation of nematic liquid crystals to robust metallogel comprising self-assembled nanowires

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