Spin-crossover materials

Previous and Current Research

·       New spin-crossover compounds

A rational choice of ligands and design of complexes allows to obtain new compounds that are able to undergo transition between the low-spin and the high-spin states under the influence of various external factors such as temperature or pressure, effect of guest molecules, light irradiation or magnetic field. 

·       Chiral SCO complexes

Introduction of a chiral fragment to complexes allows to obtain chiral spin-crossover materials that are characterized by switchable circular dichroism and can be potentially integrated into various photonic devices operating in UV and visible regions. 

·       Microwave switches

Along with electronic reconfiguration spin transition is accompanied by a drastic change of all physical properties including the ability to absorb microwave radiation. This allows to develop efficient microwave switches that are based on spin-crossover materials.

·       Switchable catalysts

The spin state of the Fe(II) centres plays a crucial role in determining redox catalytic activity. We have already found that low-spin species are characterized by higher reaction rates and smaller activation energies compared to high-spin analogues.

·       SCO nanomaterials

Spin-crossover materials are perspective for a huge variety of applications, such as molecular switching, sensing, thermal control etc. Additionally, the size effect on spin-crossover characteristics is intensively studied. 

·       Enantioselective recognition

Spin-crossover complexes are very sensitive to the inclusion of guest molecules. Upon absorption of different optical isomers of chiral guest molecules, the stereoselective shift of the spin transition temperature is observed.

International grants:

Horizon 2020 Marie Skłodowska-Curie Individual Fellowship, Johannes Gutenberg University Mainz, Germany

Methodological and Technical Expertise

• Synthesis of organic and coordination compounds, nanomaterials and composites

• X-ray crystallography

• Magnetic, calorimetric, mechanical, optical, Mossbauer, IR and Raman, UV-vis, DLS, CD measurements

• Optical microscopy, TEM

Selected Publications

Room temperature hysteretic spin crossover in a new cyanoheterometallic framework

V. M. Hiiuk, S. Shova, A. Rotaru, V. Ksenofontov, I. O. Fritsky and I. A. Gural'skiy

Chem. Commun., 2019, 55, 3359–3362, DOI: 10.1039/C8CC10260K

Multiple spin phases in a switchable Fe(II) complex: polymorphism and symmetry breaking effects

H. Hang, B. Fei, X. Q. Chen, M. L. Tong, V. Ksenofontov, I. A. Gural'skiy, X. Bao

J. Mater. Chem. C 2018, 6, 3352-3361, DOI: 10.1039/C7TC05111E

Spin-State Dependent Redox Catalytic Activity of a Switchable Iron(II) Complex

I.A. Gural'skiy, S.I. Shylin, V. Ksenofontov, W. Tremel

Eur. J. Inorg. Chem. 2017, 2017, 3125-3131. DOI: 10.1002/ejic.201700454

Synthesis, crystal structures and spectral characterization of chiral 4-R-1,2,4-triazoles

Il'ya A. Gural'skiy, Viktor A. Reshetnikov, Irina V. Omelchenko, Agnieszka Szebesczyk, Elzbieta Gumienna-Kontecka, Igor O. Fritsky

Journal of Molecular Structure 2017, 1127, 164–168, DOI: 10.1016/j.molstruc.2016.07.094

Co–Co and Co–Fe cyano-bridged pentanuclear clusters based on a methylpyrazinyl-diamine tetradentate ligand: spin crossover and metal substitution effects

B. Fei, J. Zhou, Z. Yan, S. I. Shylin, V. Ksenofontov, I. A. Gural’skiy and X. Bao

CrystEngComm, 2017, 19, 7079–7082, DOI: 10.1039/C7CE01826F

Spin-Crossover Materials towards Microwave Radiation Switches

O. I. Kucheriv, V. V. Oliynyk, V. V. Zagorodnii, V. L. Launets, I. A. Gural’skiy

Scientific Reports, 2016, 6, 38334 DOI:10.1038/srep38334

Cooperative High-Temperature Spin Crossover Accompanied by a Highly Anisotropic Structural Distortion

I. A. Gural’skiy, B. O. Golub, S. I. Shylin, V. Ksenofontov, H. J. Shepherd, P. R. Raithby, W. Tremel and I. O. Fritsky

Eur. J. Inorg. Chem., 2016, 2016, 3191–3195, DOI: 10.1002/ejic.201600406

High temperature spin crossover in [Fe(pyrazine){Ag(CN)2}2] and its solvate

I. A. Gural’skiy, S. I. Shylin, B. O. Golub, V. Ksenofontov, I. O. Fritsky and W. Tremel

New J. Chem., 2016, 40, 9012–9016, DOI: 10.1039/C6NJ01472K

Spin Crossover in Fe(II)–M(II) Cyanoheterobimetallic Frameworks (M = Ni, Pd, Pt) with 2-Substituted Pyrazines

O. I. Kucheriv, S. I. Shylin, V. Ksenofontov, S. Dechert, M. Haukka, I. O. Fritsky and I. A. Gural’skiy

Inorg. Chem., 2016, 55, 4906–4914, DOI: 10.1021/acs.inorgchem.6b00446

Enantioselective Guest Effect on the Spin State of a Chiral Coordination Framework

I. A. Gural’skiy, O. I. Kucheriv, S. I. Shylin, V. Ksenofontov, R. A. Polunin and I. O. Fritsky

Chem. Eur. J., 2015, 21, 18076–18079, DOI: 10.1002/chem.201503365

Chiral spin crossover nanoparticles and gels with switchable circular dichroism

I. A. Gural’skiy, V. A. Reshetnikov, A. Szebesczyk, E. Gumienna-Kontecka, A. I. Marynin, S. I. Shylin, V. Ksenofontov, I. O. Fritsky

J. Mater. Chem. C 2015, 3, 4737–4741, DOI: 10.1039/C5TC00161G

Iron (II) isothiocyanate complexes with substituted pyrazines: Experimental and theoretical views on their electronic structure

S. I. Shylin, I. A. Gural’skiy, D. Bykov, S. Demeshko, S. Dechert, F. Meyer, M. Hauka, I. O. Fritsky

Polyhedron 2015, 87, 147–155, DOI: 10.1016/j.poly.2014.11.016

Scopus AuthorID: 15076774000

Contacts

illia.guralskyi@univ.kiev.ua