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.

Direct detection of circularly polarized light (CPL) is a challenging task due to limited materials and ambiguous structure-property relationships that lead low distinguishability the helicities. Perovskite ferroelectric semiconductors incorporating chirality provide new opportunities in dealing with this issue. Herein, pair 2D chiral perovskite ferroelectrics reported, which have enhanced CPL performance interplays among lattice, photon, charge, spin, orbit. The chirality-transfer-induced...

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...

A novel mononuclear metal-organic compound, [Cu(Hdabco)(H(2)O)Cl(3)] (1, dabco = 1,4-diazabicyclo[2.2.2]octane) in which the Cu(II) cation adopts a slightly distorted bipyramidal geometry where three Cl anions constitute equatorial plane and Hdabco H(2)O molecule occupy two axial positions, was synthesized. Its paraelectric-to-ferroelectric phase transition at 235 K (T(c)) dynamic behaviors were characterized by single crystal X-ray diffraction analysis, thermal dielectric ferroelectric...

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:...

Two inorganic–organic hybrid compounds with zero-dimensional crystal structures, tetramethylphosphonium tetrachloroferrate(III) (compound 1, [(CH3)4P][FeCl4]) and tetrabromoferrate(III) 2, [(CH3)4P][FeBr4]), are discovered as multifunctional materials exhibiting simultaneously switchable dielectric, magnetic, optical properties. Despite the analogue chemical formulas, 1 2 crystallize in different noncentrosymmetric space groups, that is, P63mc F4̅3m, exhibit distinct responses three...

The in situ hydrothermal reactions of ZnCl2 with benzonitrile, 2-amino-5-cyanopyridine, and trans-2,3-dihydro-2-(4' '-cyanophenyl)-benzo[e]indole the presence NaN3 water afford two 3D-diamond-like networks, (CN4−C6H5)2Zn (1) (NH2−C5H3N−CN4)2Zn (2), one 2D square grid network, [(CN4−C6H4−C12H7N−C5H4N)2Zn]·1.5H2O (3), which these ligands gradually involve a noncenter-A−D (acceptor−donor) system, one-center-A−D two-center-A−D respectively. All three compounds crystallize noncentrosymmetric...

The hydrothermal reaction of (l)-ethyl lactate (Lig-Et) with Tb(ClO4)3·6H2O gives colorless block (Lig)2Tb(H2O)2(ClO4) (1), in which 1 displays a laminar 2D framework. Ferroelectric and magnetic property measurements reveal that probably is the first example two “ferroic” metal−organic frameworks. Ferroelectricity its analogue, (Lig)2Tb(D2O)2(ClO4) (2), further confirms presence ferroelectric deuterium effect.

Optical‐electrical duple bistable switches are those that enable simultaneous conversion of both optical and electrical signals in one device to realize seamless integration. Herein, imidazolium‐FCrO 3 can be prepared into a large‐size single crystal ultraflexible thin film with ultrahigh unidirectionality (0 0 4) is characterized through scanning electron microscopy (SEM), atomic force (AFM), powder X‐ray diffraction, etc. Both the display synchronously eximious optoelectronic...

A new perovskite-like inorganic–organic hybrid compound [Et3(n-Pr)P][Cd(dca)3] (1) (where [Et3(n-Pr)P]+ is the propyltriethylphosphonium cation and dca a dicyanamide ligand) was discovered to undergo three reversible phase transitions at 270 K (T1), 386 (T2), 415 (T3), respectively. The variable-temperature single-crystal X-ray structural analyses reveal that these sequential originate from deformations of [Cd(dca)3]− frameworks concomitant reorientations guest cations. It found 1 possesses...

Abstract Sufficient integration of multiple active moieties and correlated heterostructure engineering are pivotal to optimize the reaction kinetics intrinsic activities heterogeneous electrocatalysts. Herein, an integrated biphasic nanoalloys constructed, encasing in situ grown interlaced nitrogen‐doped carbon nanoflake arrays (CoFe‐NiFe/NC). Well‐designed CoFe‐NiFe/NC owns more accessible sites interfacial conjugation effects, jointly accelerating electron transfer mass transport for...

Abstract The construction of mechanically responsive materials with reversible shape‐shifting, shape‐locking, and stretchability holds promise for a wide range applications in fields such as soft robotics flexible electronics. Here, we report novel thermoelastic one‐dimensional organic–inorganic hybrids ( R/S ‐Hmpy)PbI 3 (Hmpy=2‐hydroxymethyl‐pyrrolidinium) to show mechanical responses. single crystals undergo two phase transitions at 310 K 380 K. When heated K, they shape‐shifting expansion...

The reactions of (S)-3-cyanophenylalanine with NaN3 in the presence H2O and Lewis acids (ZnCl2 CdCl2) afford two unprecedented 3D homochiral networks, mono[(S)-5-(3-tetrazoyl)-phenylalaninato]zinc(II) (1) mono[(S)-5-(3-tetrazoyl)-phenylalaninato]cadmium(II) monoaqua(II) (2), respectively. compounds are isostructural noninterpenetrated SrAl2 topology. structure these coordination polymers gives new insight into Sharpless' reaction chiral 5-substituted 1H-tetrazole supramolecular array constructions.

Abstract The hydrothermal hydrolysis reactions of Cd(ClO 4 ) 2 ·(6H O) with 4‐[2‐(2‐pyridyl)ethenyl]benzonitrile (2‐PEBN) and 2‐[2‐(4‐cyanophenyl)ethenyl]‐8‐quinolinol (2‐CEQH) afforded two coordination polymers aquabis{4‐[2‐(2‐pyridyl)ethenyl]benzoate}cadmium( II ( 1 2‐[2‐(4‐carboxylatophenyl)ethenyl]‐8‐quinolinolate(pyridine)cadmium( ), respectively. Complexes display strong blue red fluorescent emission, Both have a 2‐D grid framework containing dimer as the corner unit. Crystal data for...

Two homochiral coordination polymers [Mn2(D-cam)2(2-Hpao)4]n (1) and [Co2(D-cam)2(3-abpt)2(H2O)3]n·5nH2O (2) were prepared with D-(+)-camphoric acid, 1-D complex 1 featured good temperature-independent piezoelectric (6.9 pC N−1) dielectric properties.

Organic–inorganic hybrid molecular ferroelastics have gained widespread attention as a promising candidate for data storage, sensor, and mechanical switch applications. However, it remains great challenge to construct new ferroelastic materials. Based on the "quasi-spherical theory", we designed synthesized quasi-spherical cation [DMIE]+ ([DMIE]+ is dimethyl-isopropyl-ethyl-ammonium cation) expect Unfortunately, [DMIE][Cd(SCN)3] (1) undergoes structural phase transition from space group P63...

A new optical–electrical switching material was synthesized, and it is much superior to the predominant multifunctional devices.