A5074985937- Solid-state spectroscopy and crystallography
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Crystallography and molecular interactions
- Nonlinear Optical Materials Research
- Crystal Structures and Properties
- Perovskite Materials and Applications
- Crystal structures of chemical compounds
- Organic and Molecular Conductors Research
- Chemical Thermodynamics and Molecular Structure
- Molecular spectroscopy and chirality
- Optical and Acousto-Optic Technologies
- Acoustic Wave Resonator Technologies
- Molecular Spectroscopy and Structure
- Thermodynamic properties of mixtures
- Organometallic Compounds Synthesis and Characterization
- Luminescence Properties of Advanced Materials
- Liquid Crystal Research Advancements
- Spectroscopy and Quantum Chemical Studies
- Ferroelectric and Piezoelectric Materials
- Glass properties and applications
- Structural and Chemical Analysis of Organic and Inorganic Compounds
- Material Dynamics and Properties
- Inorganic Chemistry and Materials
- Synthesis and characterization of novel inorganic/organometallic compounds
University of Wrocław
2014-2024
Faculty (United Kingdom)
2017-2021
Polish Academy of Sciences
2001
Abstract The crystals of (CH3NH3)3Bi2Br9 have been grown which at room temperature are isomorphous with Cs3Bi2Br9 and (CH3NH3)3Sb2Br9. space group is P3m1, a = 0.807, c 1.008 nm, V 0.5685 nm3, Z 1. reveal, when cooling, three phase transitions 188 ± 0.5, 140 1, 101.5 0.5 K. high (I) behaves as plastic one respect to freedom rotation methylammonium cations. two I II III can be related, similarly (CH3NH3)3Sb2Br9, freezing reorientation those At K transition the improper ferroelectric IV was...
A ferroelectric inorganic–organic hybrid based on in situ substituted stilbazolium cation (TAMS2+ = trimethylamino-N-methyl stilbazolium) has been obtained. Single-crystal X-ray structure analysis demonstrates that the NLO-phore organic component of complex is embedded into inorganic polymeric [Bi2Cl8]2− framework and shows a polar arrangement with cooperation nonsymmetric component. The measurement nonlinear optical properties show typical ferroelectricity second harmonic generation (SHG)...
Pentakis (imidazolium) undecachlorodibismuthate(III), ${({\mathrm{C}}_{3}{\mathrm{N}}_{2}{\mathrm{H}}_{5})}_{5}{\mathrm{Bi}}_{2}{\mathrm{Cl}}_{11}$, has been synthesized and studied by means of the x-ray, differential scanning calorimetry (DSC), dielectric methods over a wide temperature range. The room crystal structure determined as monoclinic, space group $P{2}_{1}∕n$ with $a=13.616\phantom{\rule{0.3em}{0ex}}\mathrm{\AA{}}$, $b=14.684\phantom{\rule{0.3em}{0ex}}\mathrm{\AA{}}$,...
A ferroelectric crystal $[4\ensuremath{-}{\mathrm{NH}}_{2}{\mathrm{C}}_{5}{\mathrm{H}}_{4}\mathrm{NH}][{\mathrm{SbCl}}_{4}]$ has been synthesized. The x-ray diffraction studies indicate that it is made of polyanionic chains $({\mathrm{SbCl}}_{4}^{\ensuremath{-}}{)}_{n}$ forming a tunnel-like structure and the 4-aminopyridinium cations connected via weak hydrogen bonds to chlorine atoms. differential scanning calorimetry show undergoes complex sequence phase transitions:...
Novel room-temperature ferroelectric crystals with complex sequences of phase transitions.
Halogenoantimonates(<sc>iii</sc>) and halogenobismuthates(<sc>iii</sc>) are a highly versatile class of organic–inorganic hybrid materials, applicable in optoelectronics switchable dielectric devices.
A new organic-inorganic hybrid, AZEMnBr, has been synthesized and characterized. The thermal differential scanning calorimetry, analysis, thermogravimetric analyses indicate one structural phase transition (PT) at 346 349 K, on cooling heating, respectively. AZEMnBr crystallizes 365 K in the orthorhombic, Pnma, structure, which transforms to monoclinic P21/n 200 K. Due X-ray diffraction studies, anionic MnBr42- moiety is discrete. azetidinium cations show dynamical disorder high-temperature...
A new pyridinium compound, (C5H5NH)5Bi2Br11, has been synthesized. The x-ray diffraction studies indicate that its structure is built up of four independent cations and isolated Bi2Br115− groups. At room temperature it crystallizes in the monoclinic space group P21/n. Two phase transitions second- first-order type are detected by differential scanning calorimetry measurements at 118 405/403 K (on heating–cooling), respectively. corresponding anomalies linear thermal expansion 405 observed...
Ferroelastic phase transition in novel HOIP crystal with dielectric switchable properties.
Highly stable ferroelectrics with reversible high-temperature phase transitions and switchable nonlinear optical behaviour.
Herein, we have synthesised and characterised a novel organic-inorganic hybrid crystal, [CH3NH3]2KCr(CN)6 (MACr). Thermal analysis (DSC, TGA-DTA) indicates one structural phase transition (PT) at 450 K. The modified equation of the tolerance factor, t, was used to estimate theoretical PT temperature for crystal with Mn(iii). According X-ray diffraction experiment, in low-temperature (LT) phase, solid-to-solid is described by monoclinic space group C2/c. creation ferroelastic domain structure...
A novel room-temperature ferroelectric crystal with the complex sequence of phase transitions.
The dielectric dispersion in glycine phosphite crystal over the frequency range 30 - 1000 MHz is presented. Ferroelectric of Debye type along b-axis occurs microwave-frequency region and caused by a single relaxational soft mode. powder IR (at low temperatures between 300 14 K) FT Raman spectra 4000 are measured. DSC measurements for GPI deuterated crystals performed. results confirm order disorder nature proper ferroelectric phase transition second order.
Two novel guanidinium iodoantimonate(III) and iodobismuthate(III) crystals, [C(NH2)3]3[Sb2I9] [C(NH2)3]3[Bi2I9], have been synthesized their structures determined by means of single-crystal x-ray diffraction studies at three temperatures (293, 348 362 K). Both compounds appeared to be isomorphous in corresponding phases. The crystal structure the title is composed discrete M2I93− (M = Sb, Bi) anions C(NH2)3+ cations. A non-equivalence two cations has found. analogs exhibit a rich sequence...
The preparation of materials featuring more than one ferroelectric phase represents a promising strategy for controlling electrical properties arising from spontaneous polarization, since it offers an added advantage temperature-dependent toggling between two different states. Here, we report on the discovery unique ferroelectric-ferroelectric transition in diisopropylammonium tetrabromocadmate (DPAC, (C6H16N)2[CdBr4]) with Tc value 244 K, which is continuous nature. Both phases crystallize...
We have synthesised and characterised novel organic-inorganic hybrid crystals: (C3N2H5)3Sb2I9 (C3N2H5)3Bi2I9 (PSI PBI). The thermal DSC TG analyses indicate four structural phase transitions (PTs) at 366.2/366.8, 274.6/275.4, 233.3/233.3 142.8/143.1 K (on cooling/heating) for PSI two reversible PTs 365.2/370.8 252.6/257.9 PBI. Both analogues crystallize room temperature in the orthorhombic Cmcm structure, which transforms, case of PBI, to monoclinic P21/n low temperature. According X-ray...
The crystal structure has been determined for (CH<sub>3</sub>NH<sub>3</sub>)<sub>2</sub>[KCo(CN)<sub>6</sub>] at temperatures 100 and 443 K.
A description of the thermal, structural, <sup>1</sup>H NMR, electric and optical properties novel organic–inorganic hybrids.
Here we report the dynamics of organic cations as guest molecules in a perovskite host-framework.