A5010710643- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Magnetism in coordination complexes
- Metal complexes synthesis and properties
- Perovskite Materials and Applications
- Lanthanide and Transition Metal Complexes
- Metal-Organic Frameworks: Synthesis and Applications
- Crystal structures of chemical compounds
- Crystallography and molecular interactions
- Solid-state spectroscopy and crystallography
- Conducting polymers and applications
- Organic and Molecular Conductors Research
- 2D Materials and Applications
- Luminescence and Fluorescent Materials
- Electromagnetic wave absorption materials
- Luminescence Properties of Advanced Materials
- Covalent Organic Framework Applications
- Crystal Structures and Properties
- Metamaterials and Metasurfaces Applications
- Nanotechnology research and applications
- Advanced Antenna and Metasurface Technologies
- Electron Spin Resonance Studies
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Inorganic Chemistry and Materials
- Microwave Dielectric Ceramics Synthesis
Taras Shevchenko National University of Kyiv
2016-2025
University of Wrocław
2022
Energostal (Ukraine)
2018-2021
Kyiv City Clinical Oncology Center
2020-2021
University of Zurich
2021
This study describes the synthesis of first aziridinium-based compounds, namely hybrid perovskites (AzrH)PbHal3 (where AzrH = aziridinium, Hal Cl, Br or I). highly reactive species was stabilized in 3D lead halide frameworks and found to be a small enough organic cation promote formation semiconducting organo-inorganic materials.
Hybrid organic-inorganic lead halide perovskites are promising candidates for next-generation solar cells, light-emitting diodes, photodetectors, and lasers. The structural, dynamic, phase-transition properties play a key role in the performance of these materials. In this work, we use multitechnique experimental (thermal, X-ray diffraction, Raman scattering, dielectric, nonlinear optical) theoretical (machine-learning force field) approach to map phase diagrams obtain information on...
Discovery of spin-crossover (SCO) behavior in the family Fe(II)-based Hofmann clathrates has led to a "new rush" field bistable molecular materials. To date this class SCO complexes is represented by several dozens individual compounds, and areas their potential application steadily increase. Starting from Fe(2+), square planar tetracyanometalates M(II)(CN)4(2-) (M(II) = Ni, Pd, Pt) 2-substituted pyrazines Xpz (X Cl, Me, I) as coligands we obtained series nine new clathrate-like coordination...
3D hybrid perovskites based upon small organic cations gave start to a new intensively growing class of semiconducting materials. Here we report on the elaboration quantum dots recently emerged perovskite (AzrH)PbBr3 (AzrH = aziridinium cation). By employing antisolvent precipitation technique and stabilization with cationic surfactant succeeded in obtaining that display tunable luminescence. This piece work shows perspective aziridinium-based materials for advanced photonic nanostructures.
The asymmetric unit of the title organic–inorganic salt, (IC 2 H 4 NH 3 ) [BiI 6 ], consists a ] 3− octahedron and three 2-iodoethylammonium cations. octahedra do not interact with each other, supramolecular arrangement is ensured by an intricate network N—H...I hydrogen bonds between cations anions. In addition, weak I...I interaction organic cation coordination present in crystal structure. Hirshfeld surface analysis revealed that most important contributions to packing are from H...I...
Ion-mixing is a highly effective strategy for tuning the performance and stability of photovoltaic devices based on hybrid perovskites. Despite many works concentrating A- X-site mixing effects, comprehensive study effects B-site structural dynamic properties MA-based perovskites still absent. In this work, we investigate mixed lead–tin halide MAPb1–xSnxBr3 using multitechnique experimental approach including differential scanning calorimetry, dielectric spectroscopy, nuclear quadrupole...
Abstract Microwave electromagnetic radiation that ranges from one meter to millimetre wavelengths is finding numerous applications for wireless communication, navigation and detection, which makes materials able tune microwave getting widespread interest. Here we offer a new way GHz frequency by using spin-crossover complexes are known change their various physical properties under the influence of diverse external stimuli. As result electronic re-configuration process, absorption differ...
The diversity of spin crossover (SCO) complexes that, on the one hand, display variable temperature, abruptness and hysteresis transition, other are spin-sensitive to various guest molecules, makes these materials unique for detection different organic inorganic compounds. We have developed a homochiral SCO coordination polymer with transition sensitive inclusion 2-butanol, solvates (R)- (S)-alcohols demonstrate behaviours depending chirality analyte. A stereoselective response is detected...
2D coordination cyanometallic frameworks supported by the 1,2,3-triazole ligand display thermally induced cooperative spin crossover.
Novel hybrid organic–inorganic perovskites AlaH<sup>+</sup>PbHal<sub>3</sub><sup>−</sup>·H<sub>2</sub>O incorporating chiral α-alanine were synthesized.
A small cyclic cation supports the formation of new 3D hybrid semiconducting materials – halostannate perovskites (AzrH)SnX 3 (AzrH = aziridinium, X Cl, Br and I).
Spin‐crossover complexes form one of the biggest families switchable compounds. Here we show a new way to obtain spin‐crossover materials by direct synthesis from metallic iron. Four Fe II with 4‐R‐1,2,4‐triazoles have been synthesized metal oxidation: [Fe(NH 2 trz) 3 ]SO 4 , ](BF ) and two polymorphs [Fe(Htrz) (trz)]BF . Surprisingly high quality PXRD pattern allowed perform Rietveld refinement reliable crystal structure latter. All compounds studied magnetic susceptibility measurements,...
Hofmann-like cyanometalates constitute a large class of spin-crossover iron(II) complexes with variable switching properties. However, it is not yet clearly understood how the temperature and cooperativity spin transition are influenced by their structure. In this paper, we report synthesis crystal structures metal–organic coordination polymers {FeII(Mepz)[AuI(CN)2]2} ([Au]) {FeII(Mepz)2[AgI(CN)2]2} ([Ag]), where Mepz = 2-methylpyrazine, along characterization spin-state behavior...
Hybrid halide perovskites form a promising class of light-absorbing materials. Among the numerous 3D semiconducting perovskites, there is group emerging aziridinium-based hybrids that are considered to be prospective materials for optoelectronic applications. In this work, we report mixed aziridinium (AzrH)PbBrxI3-x series (AzrH = aziridinium). Small changes in composition shown have defining impact on properties reported Halogen substitution allowed variation band gap values these...
Lead halide hybrid perovskites incorporating chiral organic cations attract considerable attention due to their promising application in multifarious optoelectronic devices. However, the examples of are still limited, which greatly impedes further studies various fields. Herein, we report on new low-dimensional lead-halide enantiopure α-amino acid L-proline. Two (L-proH)PbBr3·H2O (Pro-PbBr3) and (L-proH)4Pb3Br10·4H2O (Pro-Pb3Br10) have been synthesized by employing different ratios inorganic...
Chemical composition is leading among the numerous factors that determine spin transition properties of coordination compounds.
Spin-crossover complexes with multistep transitions attract much attention due to their potential applications as multi-switches and for data storage. A four-step spin crossover is observed in the new iron(II)-based cyanometallic guest-free framework compound Fe(2-ethoxypyrazine)2 {Ag(CN)2 }2 during transition from low-spin high-spin state. reverse process occurs three steps. Crystallographic studies reveal an associated stepwise evolution of crystal structures. Multiple reported complex...
Materials that are able to switch microwave radiation strongly desired for their potential applications in electronic devices. In this paper, we show the spin-dependant interaction of spin-crossover materials with radiation, namely, ability coordination compounds [Fe(NH2trz)3]Br2 and [Fe(NH2trz)3](NO3)2 undergo a cooperative spin transition between low-spin high-spin states operate as thermoswitchable absorbers. The characteristics reflection transmission these complexes were investigated at...
Novel chiral hybrid perovskites are highly demanded for various advanced applications such as spintronics, optoelectronics, photovoltaics etc. However, the scope of these new materials is still limited. Herein, we present 2D based upon α-amino acid L-histidine. The generalized formula compounds can be denoted (L-HisH)2PbBrxI4-x (where L-His = L-histidine; x 4, 3, 2, 1, 0.4 and 0). All characterized by a very similar structural motif that consists corner-sharing lead halide octahedra arranged...
We studied the spin-state dependence of electrical conductivity two nanocrystalline powder samples spin crossover complex [Fe(pyrazine){Au(CN)2}2]. By applying an external pressure (up to 3 kbar), we were able tune charge transport properties material from a more conductive low state point toward high state. rationalize these results by taking into account activation parameters conductivity.