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Synthesis, Experimental and Theoretically Study of Bistable Magnetic Materials Based on 3d and 3d-4f Exchange Coupled Clusters: Prospects for Practical Applications

English title Synthesis, Experimental and Theoretically Study of Bistable Magnetic Materials Based on 3d and 3d-4f Exchange Coupled Clusters: Prospects for Practical Applications
Applicant Decurtins Silvio
Number 152404
Funding scheme SCOPES
Research institution Departement für Chemie und Biochemie Universität Bern
Institution of higher education University of Berne - BE
Main discipline Inorganic Chemistry
Start/End 01.05.2014 - 30.04.2017
Approved amount 195'000.00
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All Disciplines (2)

Discipline
Inorganic Chemistry
Condensed Matter Physics

Keywords (5)

magnetic properties; theoretical modeling; coordination compounds; bistability; transition metal clusters

Lay Summary (German)

Lead
Die Synergie von chemischer Synthese, chemisch-physikalischen Messungen und der Expertise in der Theorie von komplexen molekularen Systemen wird das Verständnis des Phänomens des molekularen Magnetismus weiterbringen. Diese Forschungsthematik ist im Kontext der „Molekularen Elektronik“ zu verstehen.
Lay summary

Das SCOPES Projekt mit dem Titel “Synthesis, Experimental and Theoretical Study of Bistable Magnetic Materials Based on 3d and 3d-4f Exchange Coupled Clusters: Prospects for Practical Applications” vereint zwei chemisch synthetisch arbeitende Forschungsgruppen welche auch experimentelle magnetische Daten eruiert, mit einer theoretisch fokussierten Forschungsgruppe. Auf diese Weise ist das Ziel gesetzt, die magnetischen Eigenschaften von Cluster Einheiten und Koordinationspolymeren zu untersuchen und zu verstehen. Es werden auch verschiedenste physikalische Messmethoden zur Anwendung kommen, wobei z. T. auf bestehende erfolgreiche Zusammenarbeiten mit mehreren Forschungsgruppen basiert werden kann. Diese geplante Forschungsthematik kann auch mit den Begriffen wie „Molekularer Magnetismus“ oder „Spin-Crossover Materialien“ umschrieben werden.

Direct link to Lay Summary Last update: 06.05.2014

Responsible applicant and co-applicants

Publications

Publication
From pink to blue and back to pink again: changing the Co( ii ) ligation in a two-dimensional coordination network upon desolvation
Chisca Diana, Croitor Lilia, Coropceanu Eduard B., Petuhov Oleg, Baca Svetlana G., Krämer Karl, Liu Shi-Xia, Decurtins Silvio, Rivera-Jacquez Hector J., Masunov Artëm E., Fonari Marina S. (2016), From pink to blue and back to pink again: changing the Co( ii ) ligation in a two-dimensional coordination network upon desolvation, in CrystEngComm, 18(3), 384-389.
Synthesis, Characterization, and Modeling of Magnetic Properties of a Hexanuclear Amino Alcohol-Supported {Co II2 Co III2 Dy III2 } Pivalate Cluster
Radu Ioana, Kravtsov Victor Ch., Krämer Karl, Decurtins Silvio, Liu Shi-Xia, Reu Oleg S., Ostrovsky Serghei M., Klokishner Sophia I., Baca Svetlana G. (2016), Synthesis, Characterization, and Modeling of Magnetic Properties of a Hexanuclear Amino Alcohol-Supported {Co II2 Co III2 Dy III2 } Pivalate Cluster, in The Journal of Physical Chemistry C, 120(13), 7435-7443.
Synthesis, crystal structure, and properties of a μ 3 -oxo-trichromium(III) propionate cluster with pyrazole
Botezat Olga, Filippova Irina G., Hauser Jürg, Krämer Karl, Decurtins Silvio, Liu Shi-Xia, Baca Svetlana G. (2016), Synthesis, crystal structure, and properties of a μ 3 -oxo-trichromium(III) propionate cluster with pyrazole, in Journal of Coordination Chemistry, 69(1), 72-80.
Microscopic theory of cooperative spin crossover: Interaction of molecular modes with phonons
Palii Andrew, Ostrovsky Serghei, Reu Oleg, Tsukerblat Boris, Decurtins Silvio, Liu Shi-Xia, Klokishner Sophia (2015), Microscopic theory of cooperative spin crossover: Interaction of molecular modes with phonons, in The Journal of Chemical Physics, 143(8), 084502-084502.

Collaboration

Group / person Country
Types of collaboration
Assoc. Prof. Svetlana G. Baca, Institute of Chemistry, Academy of Sciences of Moldova Moldova (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Prof. Sophia I. Klokishner, Institute of Applied Physics, Academy of Sciences of Moldova Moldova (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Prof. B. Tsukerblat, Ben-Gurion University of the Negev Israel (Asia)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Prof. M. Ward, University of Sheffield Great Britain and Northern Ireland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication

Abstract

This project is aimed at the synthesis, experimental study and theoretical modeling of new transition metal clusters, mixed transition metal-lanthanoid clusters and 1D, 2D and 3D coordination polymers (CPs) which include these clusters as repeating units. The project is focued on systems exhibiting properties promissing for practical applications such as single molecule magnet (SMM) and single chain magnet (SCM) behavior, 2D and 3D magnetic ordering, thermally driven spin-crossover (SCO) and light-induced excited spin state trapping (LIESST) effect. The synthesis and comprehensive characterization of these families of compounds with the aid of complementary magnetic and spectroscopic techniques (primarily the measurements of direct/alternating current (DC/AC) susceptibility, magnetization, heat capacity, X-ray diffractions methods, UV/Vis/NIR, IR, NMR, Mass, Raman, Mössbauer and Inelastic Neutron Scattering (INS) spectroscopies, High-Field Multi-Frequency EPR (HFMF EPR), polarized neutron diffraction, etc) will be complemented by the comprehensive theoretical description of their magnetic, relaxation and optical characteristics. The main objective is to reveal the key mechanisms governing those properties of the named compounds which are useful for nanotechnological applications. On this basis we plan to obtain new SMMs and SCMs with unprecedentedly high blocking temperatures, and new SCO materials exhibiting hysteresis at room temperatures. The proposed project is based on a tight cooperation of the following three world-recognized groups of researchers of complementary expertise who are congregated into a consortium: Swiss team headed by Prof. S. Decurtins/Dr. Karl Krämer and two Moldovan teams (experimental team headed by Assoc. Prof. S. Baca, and theoretical team headed by Prof. S. Klokishner).
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