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Grantová agentura
Czech Republic 1 Department of Inorganic Chemistry 1 Grant Agency of the Slovak Republic VEGA 1 HPC centre at the Slovak University o... 1 KEGA 1 Ministry of Education 1 Ministry of Education, Science, Resea... 1 Palacký University Olomouc 1 Slovak Research and Development agency 1 Youth and Sports of the Czech Republic 1
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- Pracoviště
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Grantová agentura
Czech Republic 1 Department of Inorganic Chemistry 1 Grant Agency of the Slovak Republic VEGA 1 HPC centre at the Slovak University o... 1 KEGA 1 Ministry of Education 1 Ministry of Education, Science, Resea... 1 Palacký University Olomouc 1 Slovak Research and Development agency 1 Youth and Sports of the Czech Republic 1
- Gurská, Mária
- Brezová, Vlasta
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Šalitroš, Ivan
Autor Šalitroš, Ivan Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 771 46, Olomouc, Czech Republic Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 61200, Brno, Czech Republic
- Švorc, Ľubomír
- Špánik, Ivan
- Moncoľ, Ján
- Pavlik, Ján
- Szolcsányi, Peter
PubMed
33645915
DOI
10.1002/cplu.202000803
Knihovny.cz E-zdroje
A series of di-/trinitroxide esters and amides featuring PROXYL and/or TEMPO radicals connected with alicyclic bridges were prepared in 61-92 % yields and their properties were analysed by using multiple experimental techniques. The examination of EPR spectra of radicals in organic solvents augmented with DFT calculations brought valuable information on the conformational dynamics and spin exchange mechanisms. Cyclic voltammetry investigations revealed (quasi)reversible electrochemical behaviour of studied nitroxides with their half-wave potentials ranging from -51 to -17 mV. SQUID measurements of selected radicals revealed that the magnetism of di- and trinitroxides is significantly different, since antiferromagnetic coupling in biradicals is notably larger than in triradicals. The single-crystal X-ray analysis of selected biradicals revealed the existence of 3D supramolecular networks of molecules linked through hydrogen-bonding interactions. These polynitroxide radicals can serve as promising bridging or chelating ligands in the synthesis of transition-metal-based molecular magnets.
- Klíčová slova
- electrochemistry, magnetism, nitroxides, radicals, spectroscopy,
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Po ukončení testovacího provozu bude odkaz přesměrován adresu produkční verze portálu Medvik.