A5081835077- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Magnetism in coordination complexes
- Lanthanide and Transition Metal Complexes
- Metal-Catalyzed Oxygenation Mechanisms
- Metal complexes synthesis and properties
- Crystallography and molecular interactions
- Porphyrin and Phthalocyanine Chemistry
- Electron Spin Resonance Studies
- Molecular Junctions and Nanostructures
- Metal-Organic Frameworks: Synthesis and Applications
- Magnetic properties of thin films
- Advanced NMR Techniques and Applications
- Quantum and electron transport phenomena
- Oxidative Organic Chemistry Reactions
- Radical Photochemical Reactions
- Crystal structures of chemical compounds
- Graphene research and applications
- Silicone and Siloxane Chemistry
- Organometallic Compounds Synthesis and Characterization
- Synthesis and properties of polymers
- Nanocluster Synthesis and Applications
- Semiconductor materials and devices
- Organic and Molecular Conductors Research
- Organometallic Complex Synthesis and Catalysis
Central European Institute of Technology
2018-2024
Brno University of Technology
2018-2024
Slovak University of Technology in Bratislava
2014-2024
Palacký University Olomouc
2019-2022
Central European Institute of Technology
2021
Institute of Food Science and Technology
2015-2020
CGB Laboratory
2020
Institute of Inorganic Chemistry of the Slovak Academy of Sciences
2009-2018
Karlsruhe Institute of Technology
2009-2017
Changing stripes: The spin-transition compound 1 can be nanopatterned by unconventional and soft lithography to give crystalline, well-oriented, μm-scale structures arranged in stripes on a silica surface. These findings have potential applications electronic devices information storage.
We present a study on thin deposits and patterning of 1-D spin-crossover compounds Fe(II)-(L)(2)H](ClO(4))(3)·MeOH [L = 4'-(4'''-pyridyl)-1,2':6'1''-bis- (pyrazolyl) pyridine] (1) that exhibit reversible, thermally driven spin transition at room temperature. Micrometric rodlike crystals 1 silicon surfaces are achieved by drop casting solvent annealing. observed the crystallinity spin-transition properties critically depends deposition procedure. Furthermore, we proved processability using...
We investigate if the functionality of spin crossover molecules is preserved when they are assembled into an interfacial device structure. Specifically, we prepare and gold nanoparticle arrays, which room-temperature introduced, more precisely, [Fe(AcS-BPP)2](ClO4)2, where AcS-BPP = (S)-(4-{[2,6-(dipyrazol-1-yl)pyrid-4-yl]ethynyl}phenyl)ethanethioate (in short, Fe(S-BPP)2). combine three complementary experiments to characterize molecule-nanoparticle structure in detail....
Abrupt room temperature switching (Tc = 295 K with a 5 hysteresis) was achieved in neutral FeII complex based on 2-(1H-pyrazol-1-yl)-6-(1H-tetrazol-5-yl)pyridine ligand. Structural characterization and spin crossover study (via SQUID magnetometry, photoexcitation X-ray absorption spectroscopy) the solid state are described.
Four pentacoordinate Co( ii ) based single ion magnets were prepared and their structural, spectral, static dynamic magnetic properties analysed in detail.
Abstract The coordination of iron(II) ions by a homoditopic ligand L with two tridentate chelates leads to the tautomerism‐driven emergence complexity, isomeric tetramers and trimers as products. structures dominant [Fe II 4 ] 8+ complexes were determined X‐ray diffraction, distinctness products was confirmed ion‐mobility mass spectrometry. Moreover, these isomers display contrasting magnetic properties (Fe spin crossover vs. blocked Fe high‐spin state). These results demonstrate how metal...
The complex [FeII{(CN)FeIIIL5}6]Cl2 consists of a mixed-valence heptanuclear cyanide-bridged unit formed Schiff-base pentadentate ligand L5 and it shows spin crossover the peripheral FeIII centres.
The mononuclear compound (1) [Fe(II)(L)(2)](BF(4))(2) (L = 4-ethynyl-2,6-bis(pyrazol-1-yl)pyridine) was prepared and structurally as well magnetically characterised. crystallisation revealed the formation of two polymorphs--the orthorhombic 1A tetragonal form 1B. A third, intermediate phase 1C found exhibiting a different space group. Reversibility transition between studied by variable-temperature single-crystal powder X-ray diffraction studies, while an irreversible observed for 1B→1C....
We report on the synthesis of spin transition compounds 1, 2 formula [Fe(L)2](A)2 (where L = 2′,6′-bis(pyrazol-1-yl)-3,4′-bipyridine, A ClO4−—compound 1; BF4−—compound 2) and compound 3 [Fe(L)(LH)](BF4)3·H2O·CH3CN LH 3-(2,6-bis(pyrazol-1-yl) pyridine-4-yl)-pyridinium(+)). Compounds were characterized by single-crystal X-ray diffraction, ESI-ToF mass spectrometry, 1H NMR elemental analysis. The diffraction study counter anion analogues 1 reveals almost identical molecular structures without...
Spin crossover (SCO) molecules are promising bistable magnetic switches with applications in molecular spintronics. However, little is known about the switching effects of a single SCO molecule when it confined between two metal electrodes. Here, we examine properties [Fe(III)(EtOSalPet)(NCS)] that specifically tailored for surface deposition and binding to only one gold electrode nanogap device. Temperature-dependent conductivity measurements on an containing electromigrated break junctions...
An anticancer azo bond-containing half-sandwich Ir( iii ) complex oxidizes ascorbate to dehydroascorbate, and recovers in the presence of reduced glutathione.
The novel tridentate ligand L (2,6-bis(1-(n-decyl)-1H-benzimidazol-2-yl)pyridine) was used for the synthesis of mononuclear Co(II) complex 1 with general formula [Co(L)Br2]. A single-crystal X-ray structural investigation confirmed expected molecular structure, and noncovalent contacts were inspected by a Hirschfeld surface analysis. electronic structure square-pyramidal contains an orbitally degenerate ground state which predetermines use Griffith–Figgis Hamiltonian analysis magnetic...
A series of spin crossover iron(III) complexes with the general composition [Fe(4OH-L6)]X (H2-4OH-L6 = 1,8-bis(4-hydroxysalicylaldiminato)-3,6-diazaoctane; X Cl, 1a; Br, 1b; I, 1c) was prepared. combination results following single crystal X-ray analysis, infrared and EPR spectroscopy, temperature dependent magnetic experiments revealed that Fe(III) atoms occur in low-spin state below room structures involve rich networks non-covalent intermolecular contacts resulting two-dimensional...
A luminescent charge neutral Fe(<sc>ii</sc>) complex [<bold>Fe(L1)2</bold>] with above room temperature hysteretic spin crossover (SCO) is reported; a phase transition associated SCO as inferred from thermal and SAXS studies.
Six new Schiff-base complexes (<bold>1–6</bold>) with pseudohalido terminal ligands exhibits spin crossover or high state behaviour.
A tridentate ligand L (2,6-bis(1-(3,5-di-tert-butylbenzyl)-1H-benzimidazol-2-yl)pyridine) was synthesized and used for the preparation of three pentacoordinated Co(ii) complexes formula [Co(L)X2] (where X = NCS- 1, Cl- 2 Br- 3) one ionic compound 4 ([Co(L)2]Br2·2CH3OH·H2O) containing a hexacoordinated centre. Static magnetic data were analysed with respect to spin (1-3) or Griffith-Figgis (4) Hamiltonian. Ab initio calculations enable us identify positive axial anisotropy parameter D...
A graphene-spin crossover (SCO) complex hybrid (Gr-SCO-A), prepared by non-covalently anchoring a pyrene tethered iron(<sc>ii</sc>)-SCO <bold>1</bold> with single/few layer graphene sheets, shows persistent thermal and light induced SCO.
A photomagnetic study of orthorhombic and tetragonal low spin polymorphs compound [Fe(L)2](BF4)2 revealed different properties thermal stability their metastable high states. Furthermore, the reversible thermally induced phase/spin transition between phases was studied by variable temperature UV/VIS spectroscopy.
Two bis-tridentate ligands L1 and L2 that contain 2,6-bis(pyrazol-1-yl) pyridine N-donor embraces introduced on a anthracene-acetylene backbone were used for the synthesis of tetranuclear compound [Fe4(L1)4](CF3SO3)8·7CH3CN (1) hexanuclear [Fe6(L2)6](CF3SO3)12·18CH3NO2·9H2O (2). The polynuclear structures both complexes confirmed by X-ray diffraction studies, which revealed [2 + 2] grid-like complex cation 1 closed-ring hexagonal molecular architecture in 2. Although compounds anthracene...
The introduction of photoactive guest molecules into a spin crossover 3D metal organic framework alters the switchable properties both host and guest.