A5079796770- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Perovskite Materials and Applications
- Solid-state spectroscopy and crystallography
- Ferroelectric and Piezoelectric Materials
- Crystallography and molecular interactions
- Conducting polymers and applications
- Acoustic Wave Resonator Technologies
- Nonlinear Optical Materials Research
- Metal-Organic Frameworks: Synthesis and Applications
- Crystal Structures and Properties
- Luminescence and Fluorescent Materials
- Organic and Molecular Conductors Research
- Crystal structures of chemical compounds
- Polyoxometalates: Synthesis and Applications
- Luminescence Properties of Advanced Materials
- Multiferroics and related materials
- Magnetism in coordination complexes
- Advanced Sensor and Energy Harvesting Materials
- Phase-change materials and chalcogenides
- Molecular Sensors and Ion Detection
- Metal complexes synthesis and properties
- Phytase and its Applications
- Microwave Dielectric Ceramics Synthesis
- Synthesis and Characterization of Heterocyclic Compounds
Southeast University
2016-2025
Zhejiang Normal University
2019-2025
Xinjiang Agricultural University
2025
Alibaba Group (China)
2024
China Academy of Space Technology
2019-2024
Southeast University
2024
China Aerospace Science and Industry Corporation (China)
2023
China National Offshore Oil Corporation (China)
2023
Jinhua Academy of Agricultural Sciences
2021
Wayne State University
2020
Molecular piezoelectrics are highly desirable for their easy and environment-friendly processing, light weight, low processing temperature, mechanical flexibility. However, although 136 years have passed since the discovery in 1880 of piezoelectric effect, molecular with a coefficient d33 comparable piezoceramics such as barium titanate (BTO; ~190 picocoulombs per newton) not been found. We show that trimethylchloromethyl ammonium trichloromanganese(II), an organic-inorganic perovskite...
Molecular ferroelectrics are highly desirable for their easy and environmentally friendly processing, light weight, mechanical flexibility. We found that diisopropylammonium bromide (DIPAB), a molecular crystal processed from aqueous solution, is ferroelectric with spontaneous polarization of 23 microcoulombs per square centimeter [close to barium titanate (BTO)], high Curie temperature 426 kelvin (above BTO), large dielectric constant, low loss. DIPAB exhibits good piezoelectric response...
Hydrothermal reaction of (l)-N-(4'-cyanobenzy)-(S)-proline with CdCl2 as a Lewis acid catalyst and NaN3 gives colorless block compound 1, in which 1 displays complicated 3D framework. Ferroelectric dielectric property measurements reveal that exhibits physical properties comparable to typical ferroelectric dipole relaxation process constant ca. 38.6 makes it, by definition, high material.
Luminescence of ferroelectric materials is one important property for technological applications, such as low-energy electron excitation. However, the vast majority doped inorganic have low luminescent efficiency. The past decade has envisaged much progress in design both and organic-inorganic hybrid complexes optoelectronic applications. combination ferroelectricity luminescence within hybrids would lead to a new type multifunctional materials. We herein report molecular ferroelectric,...
Vitamin "D": The perdeutero metal–organic framework [(CD3)2ND2][Co(DCOO)3] (see structure) undergoes two phase transitions, including one above room temperature, which is unprecedented for metal formates. Magnetic and dielectric hysteresis loops make it an example of a multiferroic MOF without coupling magnetic electric ordering. Detailed facts importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made...
A simple organic salt, diisopropylammonium chloride, shows the highest ferroelectric phase transition temperature among molecule-based ferroelectrics with a large spontaneous polarization, making it candidate for practical technological applications.
A hybrid organic-inorganic compound, (pyrrolidinium)MnBr3 , distinguished from rare earth (RE)-doped inorganic perovskites, is discovered as a new member of the ferroelectrics family, having excellent luminescent properties and relatively large spontaneous polarization 6 μC cm(-2) well weak ferromagnetism at about 2.4 K. With quantum yield >28% emission lifetime >0.1 ms, such multiferroic photoluminescence suitable candidate for future applications in luminescence materials, photovoltaics,...
Molecular motion is one of the structural foundations for development functional molecular materials such as artificial motors and ferroelectrics. Herein, we show that pendulum-like terminal group a molecule causes ferroelectric phase transition. Complex 4-methoxyanilinium tetrafluoroborate-18-crown-6 ([C7H10NO(18-crown-6)]+[BF4]−, 1) shows second-order transition at 127 K, together with an abrupt dielectric anomaly, Debye-type relaxation behavior, symmetry breaking confirmed by temperature...
Materials with circularly polarized luminescence (CPL) activity have immense potential applications in molecular switches, optical sensors, information storage, asymmetric photosynthesis, 3D displays, biological probe, and spintronic devices. However, the achiral architectures of most luminophores severely limit their practical needs. Within this context, ferroelectrics striking chemical variability structure-property flexibility bring light to assembly CPL-active ferroelectric materials....
Coupling of ferroelectricity and optical properties has become an interesting aspect material research. The switchable spontaneous polarization in ferroelectrics provides alternative way to manipulate the light-matter interaction. recent observation strong photoluminescence emission ferroelectric hybrid organic-inorganic compounds, (pyrrolidinium)MnX3 (X = Cl or Br), is attractive approach high efficiency luminescence with advantages ferroelectricity. However, only displays near below room...
Piezoelectric sensors that can work under various conditions with superior performance are highly desirable the arrival of Internet Things. For practical applications, a large piezoelectric voltage coefficient g and high Curie temperature Tc critical to sensors. Here, we report two-dimensional perovskite ferroelectric (4-aminotetrahydropyran)2PbBr4 [(ATHP)2PbBr4] saturated polarization 5.6 μC cm–2, 503 K [above BaTiO3 (BTO, 393 K)], extremely g33 660.3 × 10–3 V m N–1 [much beyond Pb(Zr,Ti)O3...
With the flourishing development of (CH3NH3)PbI3, three-dimensional (3D) organic-inorganic perovskites with unique structure-property flexibility have become a worldwide focus. However, they still face great challenges in effectively inducing ferroelectricity. Despite typical 3D perovskite structure and ability dabco (1,4-diazabicyclo[2.2.2]octane) to trigger phase transition, unfortunately [H2dabco]RbCl3 adopts nonpolar crystal without Within larger RbI3 framework, we assemble...
Abstract Abundant chemical diversity and structural tunability make organic–inorganic hybrid perovskites (OIHPs) a rich ore for ferroelectrics. However, compared with their inorganic counterparts such as BaTiO 3 , ferroelectric key properties, including large spontaneous polarization ( P s ), low coercive field E c strong second harmonic generation (SHG) response, have long been great challenges, which hinder commercial applications. Here, quasi-one-dimensional OIHP DMAGeI (DMA =...
A bifunctional electrolyte additive enabling stable Zn metal anodes.
Abstract Luminescent ferroelectrics are holding exciting prospect for integrated photoelectronic devices due to potential light‐polarization interactions at electron scale. Integrating ferroelectricity and long‐lived afterglow emission in a single material would offer new possibilities fundamental research applications, however, related reports have been blank date. For the first time, we here achieved combination of notable an organic‐inorganic hybrid material. Remarkably, presented...
Since the concept of "multiferroic" was first proposed in 1968, coupling effect between different ferroic orders has attracted great interest energy, information, and biomedical fields. However, fully ferroelectric-fully ferroelastic never been experimentally observed hybrid perovskites, even though this predicted to exist half a century ago. Realizing such cross-linking effects polarization vectors strain tensors always huge challenge because complex difference these two origins. Here, we...
Metal−organic coordination (MOC)-type ferroelectrics, cobalt(II) (R)-2-methylpiperazine (MPPA) trichloride [CoIICl3(H-MPPA)], was constructed through hydrogen bonds. It is a good ferroelectric candidate with Ps = 6.8 μC·cm−2 as high almost twice that of triglycine sulfate (Ps 3.5 μC·cm−2) and significantly larger than KH2PO4 at the low-temperature phase Fdd2. [CoIICl3(H-MPPA)] first example MOC can really reach spontaneous polarization status opens up new avenue to explore novel MOC-based...
Hydrothermal reaction of (S)-1,1'1' '-2,4,6-trimethylbenzene-1,3,5-triyl-tris(methylene)-tris-pyrrolidine-2-carboxylic acid (TBPLA) with Ni(ClO4)2·6H2O gave pale green block crystals 1. X-ray crystal structure analysis showed the complex to be a trinuclear descrete homochiral molecule each Ni center sitting in distorted octahedron geometries. Anisotropic permittivity measurements reveal that 1 exhibits huge dielectric anisotropy along its three different axes is ca. 3.5 times εr (E//c)/εr...
Hybrid organo-metal halide perovskite materials, such as CH3NH3PbI3, have been shown to be some of the most competitive candidates for absorber materials in photovoltaic (PV) applications. However, their potential has not completely developed, because a effect with an anomalously large voltage can achieved only ferroelectric phase, while these are probably at temperatures below 180 K. A new hexagonal stacking perovskite-type complex (3-pyrrolinium)(CdCl3) exhibits above-room-temperature...
Imidazolium periodate (IPI) is found to be an improper ferroelectric. It shows bistable properties simultaneously in three channels of dielectricity, piezoelectricity, and second-harmonic generation within the temperature window 300–310 K.
A supramolecular adduct 4-methoxyanilinium perrhenate 18-crown-6 was synthesized, which undergoes a disorder-order structural phase transition at about 153 K (${T}_{c}$) due to slowing down of pendulumlike motion the group upon cooling. Ferroelectric hysteresis loop measurements give spontaneous polarization $1.2\text{ }\text{ }\ensuremath{\mu}\mathrm{C}/{\mathrm{cm}}^{2}$. Temperature-dependent solid-state nuclear magnetic resonance reveal three kinds molecular motions existing in compound:...
Abstract The host–guest complex [(DIPA)([18]crown‐6)](ClO 4 ) ( 1 ; DIPA=2,6‐diisopropylanilinium) was constructed and found to undergo a sequence of phase transitions Ibam – Pbcn Pna 2 at T =278 K =132 K, respectively. Systematic characterizations, such as differential scanning calorimetry, heat capacity, temperature‐dependent dielectric constant, P–E hysteresis loop, reveal that the centrosymmetric‐to‐polar transition is paraelectric‐to‐ferroelectric transition. symmetry breaking also...
A possible above-room-temperature molecular multiferroic, triethylmethylammonium tetrabromoferrate(III) (1), has been discovered. Its ferroelectric and magnetic phase transitions take place at almost the same temperature (∼360 K), resulting in strong magnetodielectric (MD) coupling, with a MD ratio of 18% 0.6 MHz. Interestingly, 1 also undergoes low-temperature ferroelectric–ferroelectric transition an Aizu notation 6mmF6 small dielectric anomalies 171 K.